Details of the Researcher

PHOTO

Nozomu Ishiguro
Section
International Center for Synchrotron Radiation Innovation Smart
Job title
Associate Professor
Degree

  • 博士（理学）（東京大学）

  • 修士（理学）（東京大学）

Profile
東北大学多元物質科学研究所、無機材料部門放射光可視化情報計測研究分野、助教の石黒です。宜しくお願い致します。

Research History 5

  • 2020/10 - Present
    Tohoku University　International Center for Synchrotron Radiation Innovation Smart　Assistant Professor

  • 2019/04 - Present
    Tohoku University　Institute of Multidisciplinary Research for Advanced Materials (IMRAM)　Assistant Professor

  • 2014/12 - 2019/03
    RIKEN　SPring-8 Center　Postdoctoral Researcher

  • 2014/04 - 2014/11
    Nagoya University　Research Center for Materials Science　Reasearcher

  • 2013/04 - 2014/03
    Institute for Molecular Science　Department of Materials Molecular Science　Postdoctoral Reasearcher

Education 3

  • The University of Tokyo　Graduate School of Science　Department of Chemistry

    2008/04 - 2013/03

  • The University of Tokyo　School of Science　Department of Chemistry

    2006/04 - 2008/03

  • The University of Tokyo　College of Arts and Sciences　Natural Sciences I

    2004/04 - 2006/03

Professional Memberships 4

  • The American Chemical Society

  • CATALYSIS SOCIETY OF JAPAN

  • THE JAPANESE SOCIETY FOR SYNCHROTRON RADIATION RESEARCH

  • THE CHEMICAL SOCIETY OF JAPAN

Research Interests 5

  • electrochemistry

  • X-ray imaging

  • X-ray absorption fine structure (XAFS)

  • Synchrotron Radiation Science

  • Catalysis

Research Areas 3

  • Nanotechnology/Materials / Green/sustainable/environmental chemistry /

  • Energy / Quantum beam science /

  • Nanotechnology/Materials / Basic physical chemistry /

Awards 2

  1. Poster Award for The 4th Symposium for The Core Research Cluster for Materials Science and the 3rd Symposium on International Joint Graduate Program in Materials Science

    2020/11　The Core Research Cluster for Materials Science, International Joint Graduate Program in Materials Science, Tohoku University　Nano/Meso-scale Chemical State Visualization of Functional Materials Using Ptychography-XAFS

  2. 第14回XAFS討論会学生奨励賞

    2011/09　日本XAFS研究会

Papers 85

  1. Visualization of Structural Heterogeneities in Particles of Lithium Nickel Manganese Oxide Cathode Materials by Ptychographic X-ray Absorption Fine Structure. International-journal

    Hideshi Uematsu, Nozomu Ishiguro, Masaki Abe, Shuntaro Takazawa, Jungmin Kang, Eiji Hosono, Nguyen Duong Nguyen, Hieu Chi Dam, Masashi Okubo, Yukio Takahashi

    The journal of physical chemistry letters　12　(24)　5781-5788　2021/06/24

    Publisher: American Chemical Society ({ACS})

    DOI： 10.1021/acs.jpclett.1c01445 　

    ISSN： 1948-7185

    eISSN： 1948-7185

  2. Nanoscale Visualization of Phase Transition in Melting of Sn-Bi Particles by In situ Hard X-ray Ptychographic Coherent Diffraction Imaging. International-journal

    Nozomu Ishiguro, Takaya Higashino, Makoto Hirose, Yukio Takahashi

    Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada　26　(5)　878-885　2020/10/28

    Publisher: Cambridge University Press ({CUP})

    DOI： 10.1017/S1431927620024332 　

    ISSN： 1431-9276

    eISSN： 1435-8115

  3. Oxygen-diffusion-driven oxidation behavior and tracking areas visualized by X-ray spectro-ptychography with unsupervised learning Peer-reviewed

    Makoto Hirose, Nozomu Ishiguro, Kei Shimomura, Duong-Nguyen Nguyen, Hirosuke Matsui, Hieu Chi Dam, Mizuki Tada, Yukio Takahashi

    COMMUNICATIONS CHEMISTRY　2　(50)　2019/04

    DOI： 10.1038/s42004-019-0147-y 　

    ISSN： 2399-3669

  4. Nanoscale Chemical Imaging of Three-Way Catalyst Pt/Ce2Zr2Ox particles by Ptychographic-XAFS Peer-reviewed

    Makoto Hirose, Nozomu Ishiguro, Kei Shimomura, Hirosuke Matsui, Mizuki Tada, Yukio Takahashi

    Microscopy and Microanalysis　24　12-13　2018/08

    DOI： 10.1017/S1431927618012497 　

  5. Operando Time-Resolved X-ray Absorption Fine Structure Study for Pt Oxidation Kinetics on Pt/C and Pt3Co/C Cathode Catalysts by Polymer Electrolyte Fuel Cell Voltage Operation Synchronized with Rapid O-2 Exposure Peer-reviewed

    Ozawa Saki, Matsui Hirosuke, Ishiguro Nozomu, Tan Yuanyuan, Maejima Naoyuki, Taguchi Masahiro, Uruga Tomoya, Sekizawa Oki, Sakata Tomohiro, Nagasawa Kensaku, Higashi Kotaro, Tada Mizuki

    JOURNAL OF PHYSICAL CHEMISTRY C　122　(26)　14511-14517　2018/07/05

    DOI： 10.1021/acs.jpcc.8b02541 　

    ISSN： 1932-7447

  6. Structural Kinetics of Cathode Events on Polymer Electrolyte Fuel Cell Catalysts Studied by Operando Time-Resolved XAFS Peer-reviewed

    Nozomu Ishiguro, Mizuki Tada

    Catalysis Letters　148　(6)　1597-1609　2018/06

    DOI： 10.1007/s10562-018-2383-7 　

    ISSN： 1572-879X 1011-372X

  7. Visualization of Heterogeneous Oxygen Storage Behavior in Platinum-Supported Cerium-Zirconium Oxide Three-Way Catalyst Particles by Hard X-ray Spectro-Ptychography. International-journal Peer-reviewed

    Makoto Hirose, Nozomu Ishiguro, Kei Shimomura, Nicolas Burdet, Hirosuke Matsui, Mizuki Tada, Yukio Takahashi

    Angewandte Chemie (International ed. in English)　57　(6)　1474-1479　2018/02/05

    DOI： 10.1002/anie.201710798 　

    ISSN： 1433-7851

  8. Visualization of Heterogeneous Oxygen Storage Behavior in Platinum-Supported Cerium-Zirconium Oxide Three-Way Catalyst Particles by Hard X-ray Spectro-Ptychography Peer-reviewed

    Makoto Hirose, Nozomu Ishiguro, Kei Shimomura, Nicolas Burdet, Hirosuke Matsui, Mizuki Tada, Yukio Takahashi

    Angewandte Chemie　130　(6)　1490-1495　2018/01/02

    Publisher: Wiley-Blackwell

    DOI： 10.1002/ange.201710798 　

    ISSN： 0044-8249

  9. Frontispiz: Visualization of Heterogeneous Oxygen Storage Behavior in Platinum-Supported Cerium-Zirconium Oxide Three-Way Catalyst Particles by Hard X-ray Spectro-Ptychography Peer-reviewed

    Makoto Hirose, Nozomu Ishiguro, Kei Shimomura, Nicolas Burdet, Hirosuke Matsui, Mizuki Tada, Yukio Takahashi

    Angewandte Chemie　130　(6)　2018/01

    Publisher: Wiley-Blackwell

    DOI： 10.1002/ange.201880661 　

    ISSN： 0044-8249

  10. Frontispiece: Visualization of Heterogeneous Oxygen Storage Behavior in Platinum-Supported Cerium-Zirconium Oxide Three-Way Catalyst Particles by Hard X-ray Spectro-Ptychography Peer-reviewed

    Makoto Hirose, Nozomu Ishiguro, Kei Shimomura, Nicolas Burdet, Hirosuke Matsui, Mizuki Tada, Yukio Takahashi

    Angewandte Chemie International Edition　57　(6)　1474-1479　2018/01

    Publisher: Wiley-Blackwell

    DOI： 10.1002/anie.201880661 　

    ISSN： 1433-7851

  11. Structural kinetics study of redox processes of Pt/C and Pt3Co/C cathode electrocatalysts in a polymer electrolyte fuel cell during an accelerated durability test by in situ time-resolved XAFS Peer-reviewed

    Ishiguro Nozomu, Kityakarn Sutasinee, Sekizawa Oki, Uruga Tomoya, Matsui Hirosuke, Nagasawa Kensaku, Yokoyama Toshihiko, Tada Mizuki

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　253　2017/04/02

    ISSN： 0065-7727

  12. In situ時間分解能XAFS方によると固体高分子形燃料電池電極触媒の構造速度論解析 Invited Peer-reviewed

    石黒 志, 唯 美津木

    応用物理　86　(3)　209-213　2017/03

  13. Kinetics and Mechanism of Redox Processes of Pt/C and Pt3Co/C Cathode Electrocatalysts in a Polymer Electrolyte Fuel Cell during an Accelerated Durability Test Peer-reviewed

    Nozomu Ishiguro, Sutasinee Kityakarn, Oki Sekizawa, Tomoya Uruga, Hirosuke Matsui, Masahiro Taguchi, Kensaku Nagasawa, Toshihiko Yokoyama, Mizuki Tada

    JOURNAL OF PHYSICAL CHEMISTRY C　120　(35)　19642-19651　2016/09

    DOI： 10.1021/acs.jpcc.6b04437 　

    ISSN： 1932-7447

  14. Rate Enhancements in Structural Transformations of Pt-Co and Pt-Ni Bimetallic Cathode Catalysts in Polymer Electrolyte Fuel Cells Studied by in Situ Time-Resolved X-ray Absorption Fine Structure Peer-reviewed

    Nozomu Ishiguro, Sutasinee Kityakarn, Oki Sekizawa, Tomoya Uruga, Takashi Sasabe, Kensaku Nagasawa, Toshihiko Yokoyama, Mizuki Tada

    JOURNAL OF PHYSICAL CHEMISTRY C　118　(29)　15874-15883　2014/07

    DOI： 10.1021/jp504738p 　

    ISSN： 1932-7447

    eISSN： 1932-7455

  15. Visualization of the Heterogeneity of Cerium Oxidation States in Single Pt/Ce2Zr2Ox Catalyst Particles by Nano-XAFS Peer-reviewed

    Nozomu Ishiguro, Tomoya Uruga, Oki Sekizawa, Takuya Tsuji, Motohiro Suzuki, Naomi Kawamura, Masaichiro Mizumaki, Kiyofumi Nitta, Toshihiko Yokoyama, Mizuki Tada

    CHEMPHYSCHEM　15　(8)　1563-1568　2014/06

    DOI： 10.1002/cphc.201400090 　

    ISSN： 1439-4235

    eISSN： 1439-7641

  16. Structural Kinetics on a Pt/C Cathode Catalyst with Practical Catalyst Loading in an MEA for PEFC Operating Conditions Studied by In Situ Time-Resolved XAFS Peer-reviewed

    Ishiguro Nozomu, Saida Takahiro, Uruga Tomoya, Sekizawa Oki, Nagasawa Kensaku, Nitta Kiyofumi, Takashi Yamamoto, Ohkoshi Shin-ichi, Yokoyama Toshihiko, Tada Mizuki

    Physical Chemistry Chemical Physics　Vol.15　(No.43)　18827-18834　2013/09

    DOI： 10.1039/c3cp52578c 　

    ISSN： 1463-9084

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    The structural kinetics of surface events on a Pt/C cathode catalyst in a membrane electrode assembly (MEA) with a practical catalyst loading (0.5 mgPt cm(-2)) for a polymer electrolyte fuel cell were investigated by in situ time-resolved X-ray absorption fine structure analysis (XAFS; time resolution: 100 ms) for the first time. The rate constants of structural changes in the Pt/C cathode catalyst in the MEA during voltage cycling were successfully estimated. For voltage-cycling processes, all reactions (electrochemical reactions and structural changes in the Pt catalyst) in the MEA were found to be much faster than those in an MEA with a thick cathode catalyst layer, but the in situ time-resolved XAFS analysis revealed that significant time lags similarly existed between the electrochemical reactions and the structural changes in the Pt cathode catalyst. The time-resolved XAFS also revealed differences in the structural kinetics of the Pt/C cathode catalyst for the voltage-cycling processes under N2 and air flows at the cathode.

  17. Operando Time-Resolved X-ray Absorption Fine Structure Study for Surface Events on a Pt3Co/C Cathode Catalyst in a Polymer Electrolyte Fuel Cell during Voltage-Operating Processes Peer-reviewed

    Nozomu Ishiguro, Takahiro Saida, Tomoya Uruga, Shin-ichi Nagamatsu, Oki Sekizawa, Kiyofumi Nitta, Takashi Yamamoto, Shin-ichi Ohkoshi, Yasuhiro Iwasawa, Toshihiko Yokoyama, Mizuld Tada

    ACS CATALYSIS　2　(7)　1319-1330　2012/07

    DOI： 10.1021/cs300228p 　

    ISSN： 2155-5435

  18. mu-XAFS of a single particle of a practical NiOx/Ce2Zr2Oy catalyst Peer-reviewed

    Mizuki Tada, Nozomu Ishiguro, Tomoya Uruga, Hajime Tanida, Yasuko Terada, Shin-ichi Nagamatsu, Yasuhiro Iwasawa, Shin-ichi Ohkoshi

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS　13　(33)　14910-14913　2011

    DOI： 10.1039/c1cp20895k 　

    ISSN： 1463-9076

    eISSN： 1463-9084

  19. Multidimensional Tracking and Clustering of Electrochemical Reactions in the Positive Electrode of Lithium-Ion Batteries via Operando X-ray Nanoscale Chemical Imaging

    Hideshi Uematsu, Nozomu Ishiguro, Kosuke Kawai, Yuhei Sasaki, Oki Sekizawa, Masashi Okubo, Yukio Takahashi

    Chemical & Biomedical Imaging　2025/08/05

    DOI： 10.1021/cbmi.5c00036 　

  20. Activation of Anionic Redox for Stoichiometric and Li-Excess Metal Sulfides through Structural Disordering: Joint Experimental and Theoretical Study International-journal

    Miyuki Shinoda, Koki Matsunoshita, Masanobu Nakayama, Satoshi Hiroi, Koji Ohara, Masaki Abe, Nozomu Ishiguro, Yukio Takahashi, Gen Hasegawa, Naoaki Kuwata, Tsukasa Iwama, Takuya Masuda, Kosuke Suzuki, Hirofumi Ishii, Yu-Cheng Shao, Daisuke Shibata, Akinori Irizawa, Toshiaki Ohta, Itsuki Konuma, Teppei Ohno, Yosuke Ugata, Naoaki Yabuuchi

    Journal of the American Chemical Society　2025/07/15

    DOI： 10.1021/jacs.5c04018 　

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    Extensive research efforts have been dedicated to Li-excess compounds with anionic redox reaction as potential high-capacity positive electrode materials for Li-ion battery applications. The origin of activation on anionic redox is still under debate, and a unified understanding is necessary, especially for sulfide-based compounds without conductive d electrons. Herein, joint experimental and theoretical study is conducted for Li-excess and stoichiometric compounds with different crystal structures, cation-disordered rocksalt, and cation-ordered layered structures. In contrast to the understanding of Li-excess oxides, sulfide-based compounds with ordered layered structures are electrochemically less active compared with the materials with disordered structure. Theoretical study reveals that a unique local structure for a sulfide ion coordinated by 6 Li ions, SLi6 configuration, is formed, which can be found only for the disordered structure and not for the layered structure. The unique local structure triggers electron delocalization for sulfide 3p orbitals, leading to superior electronic conductivity, as experimentally evidenced, and thus anionic redox is successfully activated. Furthermore, such nonuniform local structures lead to easier structural distortion and efficient S-S dimerization, and even trimerization (S32-), upon delithiation. Although sulfide-based compounds as battery electrode materials suffer from dissolution after oxidation, this practical problem is effectively mitigated by the use of highly concentrated electrolyte solutions with fewer free solvent molecules, leading to superior reversibility for anionic redox. The insights derived can guide the development of high-energy electrode materials with anionic redox with or without transition metal ions possessing conductive d electrons.

  21. Development of Operando Hard X-ray Ptychography: Application to Thin-Film All-Solid-State Lithium-Ion Batteries

    Yuhei Sasaki, Nozomu Ishiguro, Hideshi Uematsu, Shuntaro Takazawa, Masaki Abe, Naru Okawa, Yasuhiro Suzuki, Kyosuke Ozaki, Kazuo Kobayashi, Haruki Nishino, Yoshiaki Honjo, Yasumasa Joti, Takaki Hatsui, Yasutoshi Iriyama, Yukio Takahashi

    The Journal of Physical Chemistry C　2025/06/12

    DOI： 10.1021/acs.jpcc.4c08299 　

  22. PID3Net: a deep learning approach for single-shot coherent X-ray diffraction imaging of dynamic phenomena

    Tien-Sinh Vu, Minh-Quyet Ha, Adam Mukharil Bachtiar, Duc-Anh Dao, Truyen Tran, Hiori Kino, Shuntaro Takazawa, Nozomu Ishiguro, Yuhei Sasaki, Masaki Abe, Hideshi Uematsu, Naru Okawa, Kyosuke Ozaki, Kazuo Kobayashi, Yoshiaki Honjo, Haruki Nishino, Yasumasa Joti, Takaki Hatsui, Yukio Takahashi, Hieu-Chi Dam

    npj Computational Materials　11　(1)　2025/03/12

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41524-025-01549-x 　

    eISSN： 2057-3960

  23. Guided-image-filtering-assisted phase retrieval for amplitude reconstruction in single-frame coherent diffraction imaging

    Masaki Abe, Shuntaro Takazawa, Hideshi Uematsu, Yuhei Sasaki, Naru Okawa, Nozomu Ishiguro, Yukio Takahashi

    Optica　2024/12/20

    Publisher: Optica Publishing Group

    DOI： 10.1364/OPTICA.542299 　

    eISSN： 2334-2536

  24. In situ heating coherent X-ray diffraction imaging for visualizing nanometer-scale structural changes in metallic materials

    Shuntaro Takazawa, Yuhei Sasaki, Masaki Abe, Hideshi Uematsu, Naru Okawa, Nozomu Ishiguro, Yukio Takahashi

    Materialia　102311-102311　2024/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.mtla.2024.102311 　

    ISSN： 2589-1529

  25. Real-Time Phase Retrieval Using On-the-Fly Training of Sample-Specific Surrogate Models

    Ryota Koda, Keichi Takahashi, Hiroyuki Takizawa, Nozomu Ishiguro, Yukio Takahashi

    2024 Twelfth International Symposium on Computing and Networking (CANDAR)　59-66　2024/11/26

    Publisher: IEEE

    DOI： 10.1109/candar64496.2024.00015 　

  26. Three-Dimensional Nanoscale Imaging of SiO2 Nanofiller in Styrene-Butadiene Rubber with High-Resolution and High-Sensitivity Ptychographic X-ray Computed Tomography. International-journal

    Naru Okawa, Nozomu Ishiguro, Shuntaro Takazawa, Hideshi Uematsu, Yuhei Sasaki, Masaki Abe, Kyosuke Ozaki, Yoshiaki Honjo, Haruki Nishino, Yasumasa Joti, Takaki Hatsui, Yukio Takahashi

    Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada　30　(5)　836-843　2024/11/04

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/mam/ozae094 　

    ISSN： 1431-9276

    eISSN： 1435-8115

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    Abstract SiO2 aggregates in styrene-butadiene rubber (SBR) were observed using ptychographic X-ray computed tomography (PXCT). The rubber composites were illuminated with X-rays focused by total reflection focusing mirrors, and the ptychographic diffraction patterns were collected using a CITIUS detector in the range of −75° to +75° angle of incidence. The projection images of the rubber composites were reconstructed with a two-dimensional resolution of 76 nm, and no significant structural changes were observed during the PXCT measurements. A three-dimensional image of the rubber composite was reconstructed with an isotropic resolution of 98 nm. Segmentation of SiO2 from the SBR, based on a histogram analysis of the phase shift, revealed a fragmented network structure of interconnected SiO2 aggregates.

  27. Chemical State Visualization of Lithium-Ion Battery Materials by X-Ray Ptychographic Coherent Diffraction Imaging

    Nozomu Ishiguro, Dam Hieu Chi, Yukio Takahashi

    The Materials Research Society Series　211-223　2024/10/15

    Publisher: Springer Nature Singapore

    DOI： 10.1007/978-981-97-6039-8_19 　

    ISSN： 2730-7360

    eISSN： 2730-7379

  28. Towards sub-10 nm spatial resolution by tender X-ray ptychographic coherent diffraction imaging

    Nozomu Ishiguro, Fusae Kaneko, Masaki Abe, Yuki Takayama, Junya Yoshida, Taiki Hoshino, Shuntaro Takazawa, Hideshi Uematsu, Yuhei Sasaki, Naru Okawa, Keichi Takahashi, Hiroyuki Takizawa, Hiroyuki Kishimoto, Yukio Takahashi

    Applied Physics Express　2024/05/01

    Publisher: IOP Publishing

    DOI： 10.35848/1882-0786/ad4846 　

    ISSN： 1882-0778

    eISSN： 1882-0786

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    Abstract As the first experiment at BL10U in NanoTerasu, tender X-ray ptychographic coherent diffraction imaging (PCDI) was conducted using a photon energy of 3.5 keV. The ptychographic diffraction patterns from a 200 nm-thick Ta test chart and a micrometer-sized particle of sulfurized polymer were collected. Subsequently, phase images were reconstructed with resolutions of sub-20 nm and sub-50 nm, respectively. In the near future, tender X-ray PCDI with sub-10 nm resolution is anticipated that can potentially revolutionize the visualization of nanoscale structures and chemical states in various functional materials composed of light elements.

  29. Protracted Relaxation Dynamics of Lithium Heterogeneity in Solid-State Battery Electrodes

    Su Huang, Yuta Kimura, Takashi Nakamura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Tomonari Takeuchi, Toyoki Okumura, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa

    The Journal of Physical Chemistry C　2024/04/18

    DOI： 10.1021/acs.jpcc.4c00318 　

  30. Coupling x-ray photon correlation spectroscopy and dynamic coherent x-ray diffraction imaging: Particle motion analysis from nano-to-micrometer scale Peer-reviewed

    Shuntaro Takazawa, Duc-Anh Dao, Masaki Abe, Hideshi Uematsu, Nozomu Ishiguro, Taiki Hoshino, Hieu Chi Dam, Yukio Takahashi

    Physical Review Research　5　L042019　2023/11/03

    DOI： 10.1103/PhysRevResearch.5.L042019 　

  31. In situ soft X-ray ptychography boosts insight into catalyst evolution under reaction

    Nozomu Ishiguro

    Chem Catalysis　2023/11

    DOI： 10.1016/j.checat.2023.100820 　

  32. 5D Analysis of Capacity Degradation in Battery Electrodes Enabled by Operando CT-XANES. International-journal

    Yuta Kimura, Su Huang, Takashi Nakamura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Tomonari Takeuchi, Toyoki Okumura, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa

    Small methods　7　(10)　e2300310　2023/10

    DOI： 10.1002/smtd.202300310 　

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    For devices encountering long-term stability challenges, a precise evaluation of degradation is of paramount importance. However, methods for comprehensively elucidating the degradation mechanisms in devices, particularly those undergoing dynamic chemical and mechanical changes during operation, such as batteries, are limited. Here, a method is presented using operando computed tomography combined with X-ray absorption near-edge structure spectroscopy (CT-XANES) that can directly track the evolution of the 3D distribution of the local capacity loss in battery electrodes during (dis)charge cycles, thereby enabling a five-dimensional (the 3D spatial coordinates, time, and chemical state) analysis of the degradation. This paper demonstrates that the method can quantify the spatiotemporal dynamics of the local capacity degradation within an electrode during cycling, which has been truncated by existing bulk techniques, and correlate it with the overall electrode performance degradation. Furthermore, the method demonstrates its capability to uncover the correlation among observed local capacity degradation within electrodes, reaction history during past (dis)charge cycles, and electrode microstructure. The method thus provides critical insights into the identification of degradation factors that are not available through existing methods, and therefore, will contribute to the development of batteries with long-term stability.

  33. High-resolution and high-sensitivity X-ray ptychographic coherent diffraction imaging using the CITIUS detector. International-journal

    Yukio Takahashi, Masaki Abe, Hideshi Uematsu, Shuntaro Takazawa, Yuhei Sasaki, Nozomu Ishiguro, Kyosuke Ozaki, Yoshiaki Honjo, Haruki Nishino, Kazuo Kobayashi, Toshiyuki Nishiyama Hiraki, Yasumasa Joti, Takaki Hatsui

    Journal of synchrotron radiation　30　(Pt 5)　989-994　2023/09/01

    Publisher: International Union of Crystallography (IUCr)

    DOI： 10.1107/S1600577523004897 　

    eISSN： 1600-5775

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    Ptychographic coherent diffraction imaging (PCDI) is a synchrotron X-ray microscopy technique that provides high spatial resolution and a wide field of view. To improve the performance of PCDI, the performance of the synchrotron radiation source and imaging detector should be improved. In this study, ptychographic diffraction pattern measurements using the CITIUS high-speed X-ray image detector and the corresponding image reconstruction are reported. X-rays with an energy of 6.5 keV were focused by total reflection focusing mirrors, and a flux of ∼2.6 × 1010 photons s−1 was obtained at the sample plane. Diffraction intensity data were collected at up to ∼250 Mcounts s−1 pixel−1 without saturation of the detector. Measurements of tantalum test charts and silica particles and the reconstruction of phase images were performed. A resolution of ∼10 nm and a phase sensitivity of ∼0.01 rad were obtained. The CITIUS detector can be applied to the PCDI observation of various samples using low-emittance synchrotron radiation sources and to the stability evaluation of light sources.

  34. Comprehensive Operando Visualization of the Electrochemical Events in the Cathode/Anode Layers in Thin-Film-Type All-Solid-State Lithium-Ion Batteries

    Nozomu Ishiguro, Tsutomu Totsuka, Hideshi Uematsu, Oki Sekizawa, Kazuo Yamamoto, Yasutoshi Iriyama, Yukio Takahashi

    ACS Applied Energy Materials　6　(15)　8306-8315　2023/08/14

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acsaem.3c01441 　

    ISSN： 2574-0962

    eISSN： 2574-0962

  35. X-ray ptychographic and fluorescence microscopy using virtual single-pixel imaging based deconvolution with accurate probe images. International-journal

    Masaki Abe, Nozomu Ishiguro, Hideshi Uematsu, Shuntaro Takazawa, Fusae Kaneko, Yukio Takahashi

    Optics express　31　(16)　26027-26039　2023/07/31

    Publisher: Optica Publishing Group

    DOI： 10.1364/OE.495733 　

    eISSN： 1094-4087

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    Simultaneous measurement of X-ray ptychography and fluorescence microscopy allows high-resolution and high-sensitivity observations of the microstructure and trace-element distribution of a sample. In this paper, we propose a method for improving scanning fluorescence X-ray microscopy (SFXM) images, in which the SFXM image is deconvolved via virtual single-pixel imaging using different probe images for each scanning point obtained by X-ray ptychographic reconstruction. Numerical simulations confirmed that this method can increase the spatial resolution while suppressing artifacts caused by probe imprecision, e.g., probe position errors and wavefront changes. The method also worked well in synchrotron radiation experiments to increase the spatial resolution and was applied to the observation of S element maps of ZnS particles.

  36. Multidimensional Imaging Analysis of Battery Material Particles by X-ray Ptychography

    Nozomu ISHIGURO, Yukio TAKAHASHI

    Denki Kagaku　91　(2)　145-149　2023/06/05

    Publisher: The Electrochemical Society of Japan

    DOI： 10.5796/denkikagaku.23-fe0010 　

    ISSN： 2433-3255

    eISSN： 2433-3263

  37. Nanoscale domain imaging of Li-rich disordered rocksalt-type cathode materials with X-ray spectroscopic ptychography. International-journal

    Hideshi Uematsu, Nozomu Ishiguro, Masaki Abe, Shuntaro Takazawa, Jungmin Kang, Itsuki Konuma, Naoaki Yabuuchi, Yukio Takahashi

    Physical chemistry chemical physics : PCCP　25　(5)　3867-3874　2023/02/01

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d2cp04087e 　

    ISSN： 1463-9076

    eISSN： 1463-9084

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    Domain structure in Li-rich disordered rocksalt-type cathode particles is visualized using X-ray spectroscopic ptychography and clustering analysis.

  38. Nondestructive observation of nanopipe in GaN crystal by x-ray ptychographic coherent diffraction imaging

    Yuhei Sasaki, Hideshi Uematsu, Shuntaro Takazawa, Masaki Abe, Nozomu Ishiguro, Jun Koyama, Norihito Mayama, Yuji Terui, Yukio Takahashi

    PROCEEDINGS OF THE 15TH INTERNATIONAL CONFERENCE ON X-RAY MICROSCOPY – XRM2022　2023

    Publisher: AIP Publishing

    DOI： 10.1063/5.0168127 　

    ISSN： 0094-243X

  39. Oxidation and phase transfer of individual Cr-doped dendritic FeOx particles visualized by full-field nano-XAFS spectroimaging International-journal

    Nozomu Ishiguro, Hirosuke Matsui, Kohei Wakamatsu, Yoya Suzuki, Oki Sekizawa, Kiyofumi Nitta, Yasuko Terada, Tomoya Uruga, Mizuki Tada

    Physical Chemistry Chemical Physics　25　(26)　17197-17206　2023

    DOI： 10.1039/D3CP00907F 　

    More details Close

    Iron oxides with various compositions and polymorphs have been widely used as compounds that require reversible redox properties, such as catalysts. However, partial decomposition during phase transitions often causes irreversible degradation of the redox properties of iron oxides. Cr doping into the crystalline framework of iron oxide dendrites improves the stability of the structural transformation of iron oxides. We spatially visualized the FeOx-dendrite phase distribution during oxidation in crystalline dendritic FeOx and Cr-FeOx particles by full-field nano-X-ray absorption fine structure spectroimaging. The spectroimaging visualized propagation in the phase transitions in the individual FeOx particles and changes in the phase transition behaviors of the Cr-FeOx particles. The statistical analysis of the spectroimaging data revealed the phase transition trends in parts of the FeOx and Cr-FeOx particles in three Fe density zones (particle thicknesses) and the probability densities of the phase proportions in the dendrites.

  40. Visualization of Sulfur Chemical State of Cathode Active Materials for Lithium–Sulfur Batteries by Tender X-ray Spectroscopic Ptychography

    Masaki Abe, Fusae Kaneko, Nozomu Ishiguro, Tatsuya Kubo, Fumiya Chujo, Yusuke Tamenori, Hiroyuki Kishimoto, Yukio Takahashi

    The Journal of Physical Chemistry C　2022/08/25

    Publisher: American Chemical Society ({ACS})

    DOI： 10.1021/acs.jpcc.2c02795 　

    ISSN： 1932-7447

    eISSN： 1932-7455

  41. Method for restoration of X-ray absorption fine structure in sparse spectroscopic ptychography

    Nozomu Ishiguro, Yukio Takahashi

    Journal of Applied Crystallography　55　(4)　929-943　2022/08/01

    Publisher: International Union of Crystallography (IUCr)

    DOI： 10.1107/S1600576722006380 　

    eISSN： 1600-5767

    More details Close

    The spectroscopic ptychography method, a technique combining X-ray ptychography imaging and X-ray absorption spectroscopy, is one of the most promising and powerful tools for studying the chemical states and morphological structures of bulk materials at high resolutions. However, this technique still requires long measurement periods because of insufficient coherent X-ray intensity. Although the improvements in hardware represent a critical solution, breakthroughs in software for experiments and analyses are also required. This paper proposes a novel method for restoring the spectrum structures from spectroscopic ptychography measurements with reduced energy points, by utilizing the Kramers–Kronig relationship. First, a numerical simulation is performed of the spectrum restoration for the extended X-ray absorption fine structure (EXAFS) oscillation from the thinned theoretical absorption and phase spectra. Then, this algorithm is extended by binning the noise removal to handle actual experimental spectral data. Spectrum restoration for the experimental EXAFS data obtained from spectroscopic ptychography measurements is also successfully demonstrated. The proposed restoration will help shorten the time required for spectroscopic ptychography single measurements and increase the throughput of the entire experiment under limited time resources.

  42. Variation of Local Structure and Reactivity of Pt/C Catalyst for Accelerated Degradation Test of Polymer Electrolyte Fuel Cell Visualized by Operando 3D CT-XAFS Imaging

    Matsui, H., Ishiguro, N., Tan, Y., Maejima, N., Muramoto, Y., Uruga, T., Higashi, K., Nguyen, D.-N., Dam, H.-C., Samjesk{\'e}, G., Tada, M.

    ChemNanoMat　8　(4)　2022/03/08

    DOI： 10.1002/cnma.202200008 　

    ISSN： 2199-692X

    eISSN： 2199-692X

  43. Development and application of a tender X-ray ptychographic coherent diffraction imaging system on BL27SU at SPring-8. International-journal

    Masaki Abe, Fusae Kaneko, Nozomu Ishiguro, Togo Kudo, Takahiro Matsumoto, Takaki Hatsui, Yusuke Tamenori, Hiroyuki Kishimoto, Yukio Takahashi

    Journal of synchrotron radiation　28　(Pt 5)　1610-1615　2021/09/01

    Publisher: International Union of Crystallography (IUCr)

    DOI： 10.1107/S1600577521006263 　

    ISSN： 1600-5775 0909-0495

    eISSN： 1600-5775

  44. Visualization of Material Functions through Collaboration between X-Ray Spectro-Ptychography and Data Science

    Nozomu ISHIGURO, Yukio TAKAHASHI

    Journal of the Japan Society for Precision Engineering　87　(7)　7_597-7_600　2021/07/05

    Publisher: Japan Society for Precision Engineering

    DOI： 10.2493/jjspe.87.7_597 　

    ISSN： 0912-0289

    eISSN： 1882-675X

  45. Demonstration of single-frame coherent X-ray diffraction imaging using triangular aperture: Towards dynamic nanoimaging of extended objects. International-journal

    Shuntaro Takazawa, Jungmin Kang, Masaki Abe, Hideshi Uematsu, Nozomu Ishiguro, Yukio Takahashi

    Optics express　29　(10)　14394-14402　2021/05/10

    Publisher: The Optical Society

    DOI： 10.1364/OE.419998 　

    ISSN： 1094-4087

    eISSN： 1094-4087

  46. Single-frame coherent diffraction imaging of extended objects using triangular aperture. International-journal

    Jungmin Kang, Shuntaro Takazawa, Nozomu Ishiguro, Yukio Takahashi

    Optics express　29　(2)　1441-1453　2021/01/18

    Publisher: The Optical Society

    DOI： 10.1364/OE.414341 　

    ISSN： 1094-4087

    eISSN： 1094-4087

  47. Reversible structural transformation and redox properties of Cr-loaded iron oxide dendrites studied by in situ XANES spectroscopy. International-journal

    Hirosuke Matsui, Nozomu Ishiguro, Youya Suzuki, Kouhei Wakamatsu, Chiharu Yamada, Kanako Sato, Naoyuki Maejima, Tomoya Uruga, Mizuki Tada

    Physical chemistry chemical physics : PCCP　22　(48)　28093-28099　2020/12/23

    Publisher: Royal Society of Chemistry ({RSC})

    DOI： 10.1039/d0cp04416d 　

    ISSN： 1463-9076

  48. Influence of Active Material Loading on Electrochemical Reactions in Composite Solid-State Battery Electrodes Revealed by Operando 3D CT-XANES Imaging

    Yuta Kimura, Mahunnop Fakkao, Takashi Nakamura, Toyoki Okumura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa

    ACS Applied Energy Materials　3　(8)　7782-7793　2020/08/24

    Publisher: American Chemical Society ({ACS})

    DOI： 10.1021/acsaem.0c01186 　

    ISSN： 2574-0962

    eISSN： 2574-0962

  49. Engineering a homogeneous alloy-oxide interface derived from metal-organic frameworks for selective oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid

    Yu-Te Liao, Van Chi Nguyen, Nozomu Ishiguro, Allison P. Young, Chia-Kuang Tsung, Kevin C.-W. Wu

    Applied Catalysis B: Environmental　270　118805-118805　2020/08

    Publisher: Elsevier {BV}

    DOI： 10.1016/j.apcatb.2020.118805 　

    ISSN： 0926-3373

  50. 3D Operando Imaging and Quantification of Inhomogeneous Electrochemical Reactions in Composite Battery Electrodes. International-journal

    Yuta Kimura, Aina Tomura, Mahunnop Fakkao, Takashi Nakamura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Toyoki Okumura, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa

    The journal of physical chemistry letters　11　(9)　3629-3636　2020/05/07

    Publisher: American Chemical Society ({ACS})

    DOI： 10.1021/acs.jpclett.0c00876 　

    eISSN： 1948-7185

  51. Nanoscale determination of interatomic distance by ptychography-EXAFS method using advanced Kirkpatrick-Baez mirror focusing optics. International-journal Peer-reviewed

    Makoto Hirose, Kei Shimomura, Takaya Higashino, Nozomu Ishiguro, Yukio Takahashi

    Journal of synchrotron radiation　27　(Pt 2)　455-461　2020/03/01

    Publisher: International Union of Crystallography ({IUCr})

    DOI： 10.1107/S1600577519017004 　

    ISSN： 1600-5775

    eISSN： 1600-5775

    More details Close

    <jats:p>This work demonstrates a combination technique of X-ray ptychography and the extended X-ray absorption fine structure (ptychography-EXAFS) method, which can determine the interatomic distances of bulk materials at the nanoscale. In the high-resolution ptychography-EXAFS method, it is necessary to use high-intense coherent X-rays with a uniform wavefront in a wide energy range, hence a ptychographic measurement system installed with advanced Kirkpatrick–Baez mirror focusing optics is developed and its performance is evaluated. Ptychographic diffraction patterns of micrometre-size MnO particles are collected by using this system at 139 energies between 6.504 keV and 7.114 keV including the Mn <jats:italic>K</jats:italic> absorption edge, and then the EXAFS of MnO is derived from the reconstructed images. By analyzing the EXAFS spectra obtained from a 48 nm × 48 nm region, the nanoscale bond lengths of the first and second coordination shells of MnO are determined. The present approach has great potential to elucidate the unclarified relationship among the morphology, electronic state and atomic arrangement of inhomogeneous bulk materials with high spatial resolution.</jats:p>

  52. Multibeam ptychography with synchrotron hard X-rays. International-journal Peer-reviewed

    Makoto Hirose, Takaya Higashino, Nozomu Ishiguro, Yukio Takahashi

    Optics express　28　(2)　1216-1224　2020/01/20

    Publisher: The Optical Society

    DOI： 10.1364/OE.378083 　

    eISSN： 1094-4087

    More details Close

    We report the first demonstration of multibeam ptychography using synchrotron hard X-rays, which can enlarge the field of view of the reconstructed image of objects by efficiently using partially coherent X-rays. We measured the ptychographic diffraction patterns of a Pt test sample and MnO particles using three mutually incoherent coherent beams with a high intensity that were produced by using both the multiple slits and a pair of focusing mirrors. We successfully reconstructed the phase map of the samples at a spatial resolution of 25 nm in a field of view about twice as wide as that in the single-beam ptychography. We also computationally simulated a feasible experimental setup using random modulators to further enlarge the field of view by increasing the number of available beams. The present method has the potential to enable the high spatial resolution and large field-of-view observation of specimens in materials science and biology.

  53. Pt–Co/C Cathode Catalyst Degradation in a Polymer Electrolyte Fuel Cell Investigated by an Infographic Approach Combining Three-Dimensional Spectroimaging and Unsupervised Learning Peer-reviewed

    Yuanyuan Tan, Hirosuke Matsui, Nozomu Ishiguro, Tomoya Uruga, Duong-Nguyen Nguyen, Oki Sekizawa, Tomohiro Sakata, Naoyuki Maejima, Kotaro Higashi, Hieu Chi Dam, Mizuki Tada

    The Journal of Physical Chemistry C　123　(31)　18844-18853　2019/08/08

    DOI： 10.1021/acs.jpcc.9b05005 　

    ISSN： 1932-7447

    eISSN： 1932-7455

  54. Enhanced oxygen reduction reaction performance of size-controlled Pt nanoparticles on polypyrrole-functionalized carbon nanotubes. International-journal

    Kentaro Ichihashi, Satoshi Muratsugu, Shota Miyamoto, Kana Sakamoto, Nozomu Ishiguro, Mizuki Tada

    Dalton transactions (Cambridge, England : 2003)　48　(21)　7130-7137　2019/06/07

    DOI： 10.1039/c9dt00158a 　

    ISSN： 1477-9234 1477-9226

  55. Enhanced oxygen reduction reaction performance of size-controlled Pt nanoparticles on polypyrrole-functionalized carbon nanotubes

    Ichihashi, K., Muratsugu, S., Miyamoto, S., Sakamoto, K., Ishiguro, N., Tada, M.

    Dalton Transactions　48　(21)　2019

    DOI： 10.1039/c9dt00158a 　

    ISSN： 1477-9234 1477-9226

  56. In-situ 3D CT-XAFS Imaging of Pt/C Cathode Catalysts in Polymer Electrolyte Fuel Cell during Degradation Processes by Anode Gas Exchange Cycles

    Kotaro Higashi, Tomohiro Sakata, Oki Sekizawa, Nozomu Ishiguro, Gabor Samjeske, Shinobu Takao, Takuma Kaneko, Tomoya Uruga, Yasuhiro Iwasawa, Mizuki Tada

    Microscopy and Microanalysis　24　(S2)　442-443　2018/08/10

    Publisher: Oxford University Press (OUP)

    DOI： 10.1017/s1431927618014460 　

    ISSN： 1431-9276

    eISSN： 1435-8115

  57. Three-dimensional XAFS Imaging of Polymer Electrolyte Fuel Cell Cathode Catalysts in Membrane Electrode Assembly Peer-reviewed

    Y. Tan, H. Matsui, N. Ishiguro, M. Tada

    Acc. Mater. Surf. Res.　3　165-171　2018/08/01

  58. Structural investigations of La0.6Sr0.4FeO3-δ under reducing conditions: kinetic and thermodynamic limitations for phase transformations and iron exsolution phenomena. International-journal Peer-reviewed

    Thomas Götsch, Lukas Schlicker, Maged F Bekheet, Andrew Doran, Matthias Grünbacher, Corsin Praty, Mizuki Tada, Hirosuke Matsui, Nozomu Ishiguro, Aleksander Gurlo, Bernhard Klötzer, Simon Penner

    RSC advances　8　(6)　3120-3131　2018/01/12

    DOI： 10.1039/c7ra12309d 　

    ISSN： 2046-2069

  59. Size Regulation and Stability Enhancement of Pt Nanoparticle Catalyst via Polypyrrole Functionalization of Carbon-Nanotube-Supported Pt Tetranuclear Complex. International-journal Peer-reviewed

    Satoshi Muratsugu, Shota Miyamoto, Kana Sakamoto, Kentaro Ichihashi, Chang Kyu Kim, Nozomu Ishiguro, Mizuki Tada

    Langmuir : the ACS journal of surfaces and colloids　33　(39)　10271-10282　2017/10/03

    DOI： 10.1021/acs.langmuir.7b02114 　

    ISSN： 0743-7463

  60. Operando 3D Visualization of Migration and Degradation of a Platinum Cathode Catalyst in a Polymer Electrolyte Fuel Cell

    Hirosuke Matsui, Nozomu Ishiguro, Tomoya Uruga, Oki Sekizawa, Kotaro Higashi, Naoyuki Maejima, Mizuki Tada

    Angewandte Chemie　129　(32)　9499-9503　2017/07/06

    Publisher: Wiley-Blackwell

    DOI： 10.1002/ange.201703940 　

    ISSN： 0044-8249

  61. Operando 3D Visualization of Migration and Degradation of a Platinum Cathode Catalyst in a Polymer Electrolyte Fuel Cell Peer-reviewed

    Hirosuke Matsui, Nozomu Ishiguro, Tomoya Uruga, Oki Sekizawa, Kotaro Higashi, Naoyuki Maejima, Mizuki Tada

    Angewandte Chemie International Edition　56　(32)　9371-9375　2017/07/06

    DOI： 10.1002/anie.201703940 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  62. Iron Exsolution Phenomena in Lanthanum Strontium Ferrite SOFC Anodes

    Thomas Götsch, Corsin Praty, Matthias Grünbacher, Lukas Schlicker, Maged F. Bekheet, Andrew Doran, Aleksander Gurlo, Mizuki Tada, Hirosuke Matsui, Nozomu Ishiguro, Bernhard Kloetzer, Simon Penner

    ECS Transactions　78　(1)　1327-1341　2017/05

    Publisher: The Electrochemical Society

    DOI： 10.1149/07801.1327ecst 　

    ISSN： 1938-6737

  63. Nano-XAFS imaging of oxygen diffusion in Pt-Ce2Zr2Ox particles during oxygen storage/release Peer-reviewed

    Matsui Hirosuke, Ishiguro Nozomu, Enomoto Kaori, Uruga Tomoya, Sekizawa Oki, Tada Mizuki

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　253　2017/04/02

    ISSN： 0065-7727

  64. 走査型顕微XAFS法を用いた固体粒子のイメージング Invited Peer-reviewed

    石黒 志, 松井 公佑, 唯 美津木

    触媒　59　(2)　69　2017/02

  65. In-situ X-ray nano-CT System for Polymer Electrolyte Fuel Cells under Operating Conditions Peer-reviewed

    O. Sekizawa, T. Uruga, N. Ishiguro, H. Matsui, K. Higashi, T. Sakata, Y. Iwasawa, M. Tada

    X-RAY MICROSCOPY CONFERENCE 2016 (XRM 2016)　849　012022　2017

    DOI： 10.1088/1742-6596/849/1/012022 　

    ISSN： 1742-6588

  66. Imaging of Oxygen Diffusion in Individual Platinum/Ce2Zr2Ox Catalyst Particles During Oxygen Storage and Release Peer-reviewed

    Hirosuke Matsui, Nozomu Ishiguro, Kaori Enomoto, Oki Sekizawa, Tomoya Uruga, Mizuki Tada

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　55　(39)　12022-12025　2016/09

    DOI： 10.1002/anie.201606046 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  67. Imaging of Oxygen Diffusion in Individual Platinum/Ce2Zr2OxCatalyst Particles During Oxygen Storage and Release

    Hirosuke Matsui, Nozomu Ishiguro, Kaori Enomoto, Oki Sekizawa, Tomoya Uruga, Mizuki Tada

    Angewandte Chemie　128　(39)　12201-12204　2016/08

    Publisher: Wiley-Blackwell

    DOI： 10.1002/ange.201606046 　 10.1002/anie.201606046 　

    ISSN： 0044-8249 1433-7851

  68. Formation and nitrile hydrogenation performance of Ru nanoparticles on a K-doped Al2O3 surface Peer-reviewed

    Satoshi Muratsugu, Sutasinee Kityakarn, Fei Wang, Nozomu Ishiguro, Takashi Kamachi, Kazunari Yoshizawa, Oki Sekizawa, Tomoya Uruga, Mizuki Tada

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS　17　(38)　24791-24802　2015

    DOI： 10.1039/c5cp03456f 　

    ISSN： 1463-9076

    eISSN： 1463-9084

  69. In Situ Time-Resolved XAFS of Transitional States of Pt/C Cathode Electrocatalyst in an MEA During PEFC Loading with Transient Voltages Peer-reviewed

    Sutasinee Kityakarn, Takahiro Saida, Aya Sode, Nozomu Ishiguro, Oki Sekizawa, Tomoya Uruga, Kensaku Nagasawa, Takashi Yamamoto, Toshihiko Yokoyama, Mizuki Tada

    TOPICS IN CATALYSIS　57　(10-13)　903-910　2014/06

    DOI： 10.1007/s11244-014-0250-3 　

    ISSN： 1022-5528

    eISSN： 1572-9028

  70. Electronic and local structures of Pt/C cathode electrocatalyst in MEA of PEFC during transient voltages studied by operando time-resolved XAFS Peer-reviewed

    Sutasinee Kityakarn, Takahiro Saida, Aye Sode, Nozomu Ishiguro, Oki Sekizawa, Tomoya Uruga, Kensaku Nagasawa, Takashi Yamamoto, Toshihiko Yokoyama, Mizuki Tada

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　247　2014/03

    ISSN： 0065-7727

  71. Differences in structural kinetics of Pt3Co/C and Pt/C cathode electrocatalysts under PEFC operating conditions by operando time-resolved XAFS Peer-reviewed

    Nozomu Ishiguro, Takahiro Saida, Tomoya Uruga, Oki Sekizawa, Kensaku Nagasawa, Sutasinee Kityakarn, Takashi Yamamoto, Toshihiko Yokoyama, Mizuki Tada

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　247　2014/03

    ISSN： 0065-7727

  72. Structural kinetics of a Pt/C cathode catalyst with practical catalyst loading in an MEA for PEFC operating conditions studied by in situ time-resolved XAFS Peer-reviewed

    Nozomu Ishiguro, Takahiro Saida, Tomoya Uruga, Oki Sekizawa, Kensaku Nagasawa, Kiyofumi Nitta, Takashi Yamamoto, Shin-Ichi Ohkoshi, Toshihiko Yokoyama, Mizuki Tada

    Physical Chemistry Chemical Physics　15　(43)　18827-18834　2013/11/21

    DOI： 10.1039/c3cp52578c 　

    ISSN： 1463-9076

  73. Ceria-Doped Ni/SBA-16 Catalysts for Dry Reforming of Methane Peer-reviewed

    Shenghong Zhang, Satoshi Muratsugu, Nozomu Ishiguro, Mizuki Tada

    ACS CATALYSIS　3　(8)　1855-1864　2013/08

    DOI： 10.1021/cs400159w 　

    ISSN： 2155-5435

  74. Selective catalysis and active structures for direct phenol synthesis and CH4 reforming Peer-reviewed

    Mizuki Tada, Linsheng Wang, Shin-ichi Nagamatsu, Shenghong Zhang, Nozomu Ishiguro, Sadaaki Yamamoto, Yasuhiro Iwasawa

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　245　2013/04

    ISSN： 0065-7727

  75. Development of fast scanning microscopic XAFS measurement system Peer-reviewed

    T. Tsuji, T. Uruga, T. Uruga, K. Nitta, N. Kawamura, M. Mizumaki, M. Suzuki, M. Suzuki, O. Sekizawa, N. Ishiguro, M. Tada, H. Ohashi, H. Yamazaki, H. Yamazaki, H. Yumoto, H. Yumoto, T. Koyama, T. Koyama, Y. Senba, Y. Senba, T. Takeuchi, T. Takeuchi, Y. Terada, Y. Terada, N. Nariyama, N. Nariyama, K. Takeshita, K. Takeshita, A. Fujiwara, S. Goto, S. Goto, M. Yamamoto, M. Yamamoto, M. Takata, M. Takata, T. Ishikawa, T. Ishikawa

    Journal of Physics: Conference Series　430　(1)　012019　2013/01

    DOI： 10.1088/1742-6596/430/1/012019 　

    ISSN： 1742-6588

    eISSN： 1742-6596

  76. Perovskite NaCeTi2O6-Supported Ni Catalysts for CH4 Steam Reforming Peer-reviewed

    Shenghong Zhang, Satoshi Muratsugu, Nozomu Ishiguro, Shin-ichi Ohkoshi, Mizuki Tada

    CHEMCATCHEM　4　(11)　1783-1790　2012/11

    DOI： 10.1002/cctc.201200239 　

    ISSN： 1867-3880

  77. Back Cover: Perovskite NaCeTi2O6-Supported Ni Catalysts for CH4Steam Reforming (ChemCatChem 11/2012)

    Shenghong Zhang, Satoshi Muratsugu, Nozomu Ishiguro, Shin-ichi Ohkoshi, Mizuki Tada

    ChemCatChem　4　(11)　1864-1864　2012/10

    Publisher: Wiley-Blackwell

    DOI： 10.1002/cctc.201290043 　

    ISSN： 1867-3880

  78. 4D Visualization of a Cathode Catalyst Layer in a Polymer Electrolyte Fuel Cell by 3D Laminography-XAFS

    Takahiro Saida, Oki Sekizawa, Nozomu Ishiguro, Masato Hoshino, Kentaro Uesugi, Tomoya Uruga, Shin-ichi Ohkoshi, Toshihiko Yokoyama, Mizuki Tada

    Angewandte Chemie　124　(41)　10457-10460　2012/09/11

    Publisher: Wiley-Blackwell

    DOI： 10.1002/ange.201204478 　

    ISSN： 0044-8249

  79. The Active Phase of Nickel/Ordered Ce2Zr2OxCatalysts with a Discontinuity (x=7-8) in Methane Steam Reforming

    Mizuki Tada, Shenghong Zhang, Sachin Malwadkar, Nozomu Ishiguro, Jun-ichi Soga, Yasutaka Nagai, Keitaro Tezuka, Hideo Imoto, Shinya Otsuka-Yao-Matsuo, Shin-ichi Ohkoshi, Yasuhiro Iwasawa

    Angewandte Chemie　124　(37)　9495-9499　2012/08

    Publisher: Wiley-Blackwell

    DOI： 10.1002/ange.201205167 　

    ISSN： 0044-8249

  80. Preparation and Catalytic Performances of a Molecularly Imprinted Ru-Complex Catalyst with an NH2 Binding Site on a SiO2 Surface Peer-reviewed

    Yong Yang, Zhihuan Weng, Satoshi Muratsugu, Nozomu Ishiguro, Shin-ichi Ohkoshi, Mizuki Tada

    CHEMISTRY-A EUROPEAN JOURNAL　18　(4)　1142-1153　2012/01

    DOI： 10.1002/chem.201100529 　

    ISSN： 0947-6539

    eISSN： 1521-3765

  81. Sulfoxidation on a SiO2-supported Ru complex using O-2/aldehyde system Peer-reviewed

    Niladri Maity, Chularat Wattanakit, Satoshi Muratsugu, Nozomu Ishiguro, Yong Yang, Shin-ichi Ohkoshi, Mizuki Tada

    DALTON TRANSACTIONS　41　(15)　4558-4565　2012

    DOI： 10.1039/c2dt12133f 　

    ISSN： 1477-9226

  82. The Active Phase of Nickel/Ordered Ce2Zr2Ox Catalysts with a Discontinuity (x=7-8) in Methane Steam Reforming Peer-reviewed

    Mizuki Tada, Shenghong Zhang, Sachin Malwadkar, Nozomu Ishiguro, Jun-ichi Soga, Yasutaka Nagai, Keitaro Tezuka, Hideo Imoto, Shinya Otsuka-Yao-Matsuo, Shin-ichi Ohkoshi, Yasuhiro Iwasawa

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　51　(37)　9361-9365　2012

    DOI： 10.1002/anie.201205167 　

    ISSN： 1433-7851

  83. 4D Visualization of a Cathode Catalyst Layer in a Polymer Electrolyte Fuel Cell by 3D Laminography-XAFS Peer-reviewed

    Takahiro Saida, Oki Sekizawa, Nozomu Ishiguro, Masato Hoshino, Kentaro Uesugi, Tomoya Uruga, Shin-ichi Ohkoshi, Toshihiko Yokoyama, Mizuki Tada

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　51　(41)　10311-10314　2012

    DOI： 10.1002/anie.201204478 　

    ISSN： 1433-7851

  84. Preparation of surface molecularly imprinted Ru-complex catalysts for asymmetric transfer hydrogenation in water media Peer-reviewed

    Zhihuan Weng, Satoshi Muratsugu, Nozomu Ishiguro, Shin-ichi Ohkoshi, Mizuki Tada

    DALTON TRANSACTIONS　40　(10)　2338-2347　2011

    DOI： 10.1039/c0dt00950d 　

    ISSN： 1477-9226

    eISSN： 1477-9234

  85. In-situ time-resolved DXAFS and Raman spectroscopy for selective ethanol oxidation on supported vanadium catalysts Peer-reviewed

    Mizuki Tada, Nozomu Ishiguro, Daisuke Murakami, Yasuhiro Iwasawa

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　240　2010/08

    ISSN： 0065-7727

Show all ︎Show first 5

Misc. 72

  1. スパースX線スペクトロタイコグラフィにおける XAFSスペクトルの復元アルゴリズムの提案

    石黒志, 高橋幸生

    第36回日本放射光学会年会・放射光科学合同シンポジウム要旨集　2023/01

  2. Chemical States Visualization of Cathode Active Materials by X-ray Spectroscopic Ptychography Invited

    47th International Conference and Expo on Advanced Ceramics and Composites (ICACC2023)　2023/01

  3. X線スペクトロタイコグラフィ法による 機能性材料粒子のナノ化学状態イメージング Invited

    石黒 志

    日本顕微鏡学会 第78学術講演会 要旨集　2022/05

  4. Data-Driven Optimization of Particle Parameters of Active Materials Based on High-Spatial-Resolution 3D Operando Observation of Reaction Distribution in Solid State Batteries

    木村勇太, HUANG Su, 中村崇司, 石黒志, 有吉欽吾, 竹内友成, 奥村豊旗, 関澤央輝, 新田清文, 宇留賀朋哉, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    固体イオニクス討論会講演要旨集　48th　2022

  5. Improvement of Coherent Diffraction XAFS Imaging Method and its Application for Studies of Chemical States Distribution in Catalyst Particle

    SPring-8/SACLA Research Report　10　339　2022

    DOI： 10.18957/rr.10.4.339 　

  6. In situ visualization of chemical states in functional materials using X-ray ptychography imaging Invited

    Nozomu Ishiguro, Yukio Takahashi

    The International Chemical Congress of Pacific Basin Societies 2021　2021/12

  7. X線イメージングと分光の組み合わせによる機能性材料系の化学状態解析 Invited

    石黒志

    第12回日本放射光学会 放射光基礎講習会 講義資料　2021/09

  8. High-resolution Operando 3D Visualization of Reaction Distribution in Composite Cathodes for Solid State Batteries Using Imaging CT-XAFS

    木村勇太, SU Huang, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 竹内友成, 奥村豊旗, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    固体イオニクス討論会講演要旨集　47th (CD-ROM)　2021

  9. Development of 10 nm Spatial Resolved XAFS Measurement System using Coherent Diffraction XAFS Imaging Method

    新田清文, 関澤央輝, 石黒志, 鈴木基寛, 河村直己, 水牧仁一朗, 唯美津木, 宇留賀朋哉

    SPring-8/SACLA利用研究成果集(Web)　9　(1)　2021

    ISSN： 2187-6886

  10. Nano-scale Chemical State Visualization using Ptychography-XAFS Invited

    Nozomu Ishiguro

    Next Generation Spectro-Microscopy and Micro-Spectroscopy Workshop 2020 Abstract　18-18　2020/10

  11. CT-EXAFS法によるPEFCカソード触媒の劣化過程の局所構造イメージング

    松井公佑, 石黒志, TAN Yuanyuan, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 東晃太朗, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　33rd　2020

  12. Operando XAFS Imaging of Distribution of Pt Cathode Catalysts in PEFC MEA. International-journal Invited Peer-reviewed

    Hirosuke Matsui, Naoyuki Maejima, Nozomu Ishiguro, Yuanyuan Tan, Tomoya Uruga, Oki Sekizawa, Tomohiro Sakata, Mizuki Tada

    Chemical record (New York, N.Y.)　19　(7)　1380-1392　2019/07

    DOI： 10.1002/tcr.201800123 　

    ISSN： 1528-0691 1527-8999

  13. CT-XAFSを用いたバルク型全固体リチウムイオン電池合剤電極内の不均一反応のオペランド可視化計測

    戸村愛菜, 木村勇太, FAKKAO Mahunnop, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    電気化学会大会講演要旨集(CD-ROM)　86th　2019

  14. オペランドCT-XAFSを用いた全固体リチウムイオン電池合剤電極の微細構造と不均一反応の相関解明

    木村勇太, 戸村愛菜, SU Huang, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    固体イオニクス討論会講演要旨集　45th　2019

  15. Crドープ酸化鉄結晶のドーパントサイト解析とレドックス特性

    松井公佑, 石黒志, 関澤央輝, 宇留賀朋哉, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　32nd　2019

  16. Cr,Rh含有セリア結晶内の酸化還元に伴うCe酸化数分布の可視化

    若松昂平, 若松昂平, 松井公佑, 松井公佑, 石黒志, 邨次智, 邨次智, 関澤央輝, 宇留賀朋哉, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　32nd　2019

  17. Investigation of the Cause of Reaction Distribution Formation in a Composite Electrode for Bulk-Type All-Solid-State Li-ion Batteries by Using Operando CT-XAFS and FIB-SEM

    戸村愛菜, HUANG S., 木村勇太, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    電池討論会PDF要旨集(CD-ROM)　60th　2019

  18. オペランドCT-XAFSによる全固体リチウムイオン電池合剤電極内の不均一反応の可視化計測

    木村勇太, 戸村愛菜, 黄溯, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    東北大学多元物質科学研究所研究発表会講演予稿集　19th　2019

  19. Three-dimensional Imaging-XAFS Visualization of Cathode Catalyst Degradation in Polymer Electrolyte Fuel Cell Invited

    Yuanyuan Tan, Hirosuke Matsui, Nozomu Ishiguro, Mizuki Tada

    Accounts of Materials & Surface Research　3　(3)　165-171　2018/08/01

    ISSN： 2189-6615

  20. カソードのガス交換と電位操作によるPEFC Pt/C,Pt3Co/Cカソード触媒の酸化過程の構造速度論解析

    小澤沙記, 松井公佑, 松井公佑, 田口将寛, 石黒志, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 関澤央輝, 坂田智裕, 東晃太朗, 唯美津木, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　98th　2018

  21. オペランドCT-XAFSによるバルク型全固体リチウムイオン電池の合剤電極内反応分布形成挙動の解析

    木村勇太, 戸村愛菜, MAHUNNOP Fakkao, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    固体イオニクス討論会講演要旨集　44th　2018

  22. Analysis of the Reaction Distribution Formation in a Composite Electrode for Bulk-type All-solid-state Lithium-ion Batteries by Using Operando CT-XAFs

    木村勇太, 戸村愛菜, MAHUNNOP Fakkao, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 唯美津木, 内本喜晴, 雨澤浩史

    電池討論会講演要旨集　59th　2018

  23. オペランドCT-XAFS法による固体高分子形燃料電池の触媒劣化・溶出様式の3次元可視化

    松井公佑, 松井公佑, 石黒志, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 関澤央輝, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　31st　2018

  24. EXAFS-CTによる燃料電池触媒の局所構造イメージング

    前島尚行, 松井公佑, 松井公佑, 石黒志, TAN Yuanyuan, 宇留賀朋哉, 宇留賀朋哉, 坂田智裕, 関澤央輝, 関澤央輝, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　31st　2018

  25. オペランド時間分解XAFS法によるPEFC発電下におけるPtカソード触媒酸化反応の速度論解析

    小澤沙記, 松井公佑, 松井公佑, 石黒志, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 関澤央輝, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　31st　2018

  26. CT-XAFSを用いたバルク型全固体リチウムイオン電池用合剤電極内の反応分布のオペランド評価

    木村勇太, MAHUNNOP Fakkao, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 内本喜晴, 雨澤浩史

    電気化学会大会講演要旨集(CD-ROM)　85th　2018

  27. オペランドCT-XAFSを用いたバルク型全固体リチウムイオン電池用合剤電極内反応分布の定量的解析

    木村勇太, 戸村愛菜, FAKKAO Mahunnop, 中村崇司, 石黒志, 関澤央輝, 新田清文, 宇留賀朋哉, 奥村豊旗, 唯美津木, 内本喜晴, 雨澤浩史

    電気化学秋季大会講演要旨集(CD-ROM)　2018　2018

  28. 結像型顕微XAFSによる樹状型FeOx粒子の酸化還元サイクルおける酸化鉄相分布の可視化

    石黒志, 松井公佑, 鈴木陽也, 関澤央輝, 新田清文, 寺田靖子, 宇留賀朋哉, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　31st　2018

  29. カソードガス交換・セル電圧の同期変化による固体高分子形燃料電池Pt/Cカソード電極触媒の構造速度論解明

    田口将寛, 松井公佑, 石黒志, 関澤央輝, 坂田智裕, 宇留賀朋哉, 宇留賀朋哉, 唯美津木, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　97th　2017

  30. 走査型顕微XAFS法によるCe2Zr2Ox触媒粒子内の酸素拡散様式イメージング

    松井公佑, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 唯美津木, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　97th　2017

  31. オペランド3次元CT-XAFSを用いた酸化物型全固体リチウムイオン電池合材電極内の反応分布評価

    木村勇太, FAKKAO Mahunnop, 大崎静夏, 高野彬, 中村崇司, 伊奈稔哲, 石黒志, 関澤央輝, 宇留賀朋哉, 奥村豊旗, 唯美津木, 内本喜晴, 雨澤浩史

    電気化学会東北支部セミコンファレンス講演論文集　48th　2017

  32. オペランド3次元イメージングXAFSを用いたバルク型全固体リチウムイオン電池用合材電極内の反応分布評価

    木村勇太, FAKKAO Mahunnop, 大崎静夏, 高野彬, 中村崇司, 伊奈稔哲, 石黒志, 関澤央輝, 宇留賀朋哉, 奥村豊旗, 唯美津木, 内本喜晴, 雨澤浩史

    固体イオニクス討論会講演要旨集　43rd　2017

  33. オペランド時間分解XAFSによる固体高分子形燃料電池カソード酸素還元反応の触媒構造速度論解析

    田口将寛, 松井公佑, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　30th　2017

  34. 固体高分子形燃料電池の3次元イメージング用in-situ走査型CT計測法の開発

    関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 坂田智裕, 東晃太朗, 石黒志, 松井公佑, 唯美津木, 唯美津木, 岩澤康裕

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　30th　2017

  35. 走査型顕微XAFS法によるCe2Zr2Ox粒子内の酸素拡散様式の可視化

    松井公佑, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　30th　2017

  36. 走査型顕微XAFS法による酸化鉄粒子のレドックス能劣化過程における結晶相分布の可視化

    鈴木陽也, 松井公佑, 石黒志, 新田清文, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 寺田晴子, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　30th　2017

  37. 走査型顕微XAFS法による酸化鉄粒子の酸素吸蔵・放出に伴う結晶相分布変化の可視化

    鈴木陽也, 松井公佑, 石黒志, 新田清文, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 寺田靖子, 唯美津木, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　97th　2017

  38. 結像顕微XAFS法による樹状型FeOx結晶粒子の化学状態イメージング

    石黒志, 松井公佑, 鈴木陽也, 関澤央輝, 新田清文, 寺田靖子, 宇留賀朋哉, 宇留賀朋哉, 唯美津木, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　97th　2017

  39. 結像顕微XAFS法による樹状型FeOx粒子の化学状態イメージングの検討

    石黒志, 松井公佑, 鈴木陽也, 関澤央輝, 新田清文, 寺田靖子, 宇留賀朋哉, 宇留賀朋哉, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　30th　2017

  40. 固体高分子形燃料電池の3次元イメージング用in-situ結像型CT計測法の開発

    関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 東晃太朗, 石黒志, 松井公佑, 唯美津木, 唯美津木, 岩澤康裕

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　2016

  41. In situ CT-XAFSによるPEFC発電下におけるMEA内カソード電極触媒の3次元局所構造イメージング

    松井公佑, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 横山利彦, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　2016

  42. In situ顕微XAFS法によるPt/Ce2Zr2Ox触媒粒子界面の酸化還元反応下における化学状態イメージング

    榎本香里, 石黒志, 松井公佑, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　2016

  43. 固体高分子形燃料電池に対するin-situ3次元イメージング計測法の開発

    関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 東晃太朗, 石黒志, 松井公佑, 岩澤康裕, 唯美津木, 唯美津木

    電気化学会大会講演要旨集(CD-ROM)　83rd　2016

  44. 固体高分子形燃料電池計測のためのin-situ高分解能3次元イメージング手法の開発

    関澤央輝, 宇留賀朋哉, 石黒志, 東晃太朗, 松井公佑, 岩澤康裕, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　96th　2016

  45. 走査型顕微XAFS法によるPt接触Ce2Zr2Ox触媒の酸化還元反応下の粒子内Ce酸化状態分布イメージング

    松井公佑, 石黒志, 榎本香里, 関澤央輝, 宇留賀朋哉, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　96th　2016

  46. In situ CT-XAFSによる固体高分子形燃料電池の駆動下におけるPt触媒局所構造の3次元イメージング

    松井公佑, 石黒志, 関澤央輝, 宇留賀朋哉, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　96th　2016

  47. In situ時間分解XAFSを用いた燃料電池Pt/C及びPt3Co/Cカソード触媒の劣化過程における構造速度論変化の検討

    石黒志, 石黒志, KITYAKARN Sutasinee, 長澤兼作, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 横山利彦, 唯美津木, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　2016

  48. In situ時間分解XAFS法を用いた固体高分子形燃料電池Pt/C及びPt3Co/Cカソード電極触媒の劣化過程における構造速度論変化の検討

    石黒志, KITYAIKARN Sutasinee, 関澤央輝, 長澤兼作, 宇留賀朋哉, 横山利彦, 唯美津木

    日本化学会春季年会講演予稿集(CD-ROM)　96th　2016

  49. In situ顕微XAFS法によるPt接触Ce2Zr2Ox粒子の酸化状態イメージング

    榎本香里, 石黒志, 松井公佑, KITYAKARN Sutasinee, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　28th　2015

  50. 固体高分子形燃料電池に対するin-situ CT計測法の開発

    関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 松井公佑, 石黒志, KITYAKARN Sutasinee, 岩澤康裕, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　28th　2015

  51. CT-XAFSによる燃料電池の空間分解XAFS解析

    松井公佑, 関澤央輝, 石黒志, KITYAKARN Sutasinee, 宇留賀朋哉, 宇留賀朋哉, 横山利彦, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　28th　2015

  52. 角度制限CT法を用いた固体高分子形燃料電池に対するin-situ3次元XAFSイメージング計測法の開発

    関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 松井公佑, 石黒志, KITYAKARN Sutasinee, 岩澤康裕, 唯美津木

    日本化学会講演予稿集　95th　(2)　2015

    ISSN： 0285-7626

  53. In situ走査型顕微XAFS法によるPt担持Ce2Zr2Ox粒子触媒のCe酸化状態イメージング

    榎本香里, 石黒志, 松井公佑, KITYAKARN Sutasinee, 関澤央輝, 宇留賀朋哉, 唯美津木

    日本化学会講演予稿集　95th　(2)　2015

    ISSN： 0285-7626

  54. In situ CT-XAFSによる固体高分子形燃料電池の駆動下におけるPt触媒局所構造の3次元イメージング

    松井公佑, 関澤央輝, 石黒志, 宇留賀朋哉, 横山利彦, 唯美津木

    日本化学会講演予稿集　95th　(2)　2015

    ISSN： 0285-7626

  55. K-Al2O3表面固定化Ruナノ粒子形成過程とニトリル類の選択水素化反応特性の検討

    邨次智, KITYAKARN Sutasinee, WANG Fei, 石黒志, 関澤央輝, 宇留賀朋哉, 蒲池高志, 吉澤一成, 唯美津木

    日本化学会講演予稿集　95th　(2)　2015

    ISSN： 0285-7626

  56. SPring-8における新しい顕微XAFS

    新田清文, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 鈴木基寛, 河村直己, 水牧仁一朗, 石黒志, 唯美津木

    KEK Proceedings (Web)　(2015-5)　2015

  57. In situ時間分解XAFSを用いた構造速度論解析によるPt3M/C(M=Co,Ni)カソード触媒の反応活性化要因の検討

    石黒志, KITYAKARN Sutasinee, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 長澤兼作, 横山利彦, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　28th　2015

  58. In situ時間分解XAFSによる固体高分子形燃料電池Pt3M/C(M=Co,Ni)カソード電極触媒の構造速度論解析と反応活性化要因の検討

    石黒志, KITYAKARN Sutasinee, 宇留賀朋哉, 関澤央輝, 長澤兼作, 横山利彦, 唯美津木

    日本化学会講演予稿集　95th　(2)　2015

    ISSN： 0285-7626

  59. X線ナノビームを用いた顕微XAFS法によるPt/Ce2Zr2Ox触媒粒子内のCe酸化状態のイメージング

    石黒志, 石黒志, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 辻卓也, 鈴木基寛, 河村直己, 水牧仁一朗, 新田清文, 横山利彦, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　27th　2014

  60. 硬X線ナノ集光ビームを用いた走査型顕微XAFS法によるPt/Ce2Zr2Ox触媒粒子内のCe酸化状態イメージング

    石黒志, 宇留賀朋哉, 関澤央輝, 辻卓也, 鈴木基寛, 河村直己, 水牧仁一朗, 新田清文, 横山利彦, 唯美津木

    日本化学会講演予稿集　94th　(2)　2014

    ISSN： 0285-7626

  61. In-situ時間分解XAFS法を用いた実用触媒担持量MEA中のPt/Cカソード触媒の電圧操作過程における速度論的構造解析の検討

    石黒志, 石黒志, 才田隆広, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 長澤兼作, 新田清文, 横山利彦, 唯美津木

    燃料電池シンポジウム講演予稿集　21st　2014

  62. 実用量のPt/Cカソード触媒を塗布したMEAにおけるin-situ時間分解XAFS解析

    石黒志, 石黒志, 才田隆広, 宇留賀朋哉, 宇留賀朋哉, 関澤央輝, 長澤兼作, 新田清文, 山本孝, 大越慎一, 横山利彦, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　26th　2013

  63. In-situ時間分解XAFS法を用いた過渡電圧観察時のPt/C触媒の価数変化

    早出彩, 才田隆広, KITYAKARN Sutasinee, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 長澤兼作, 山本孝, 横山利彦, 唯美津木

    電気化学会大会講演要旨集　80th　2013

  64. In-situ XAFS法を用いたPt/C触媒の有効活性サイトの評価と触媒劣化現象

    才田隆広, 早出彩, KITYAKARN Sutasinee, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 新田清文, 長澤兼作, 山本孝, 横山利彦, 唯美津木

    電気化学会大会講演要旨集　80th　2013

  65. In-situ空間分解XAFS法を用いた二次元空間におけるPt/C触媒の酸化還元挙動

    才田隆広, 早出彩, KITYAKARN Sutasinee, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 長澤兼作, 山本孝, 横山利彦, 唯美津木

    電気化学会大会講演要旨集　80th　2013

  66. 燃料電池MEA内Pt/Cカソード触媒のin-situ時間分解XAFS構造解析

    石黒志, 才田隆広, 長澤兼作, 関澤央輝, 宇留賀朋哉, 山本孝, 横山利彦, 大越慎一, 唯美津木

    日本化学会講演予稿集　93rd　(2)　2013

    ISSN： 0285-7626

  67. In-situ時間分解XAFS法によるPt-Co/C燃料電池カソード触媒の触媒構造速度論解析

    石黒志, 石黒志, 才田隆広, 永松伸一, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 新田清文, 山本孝, 大越慎一, 岩澤康裕, 横山利彦, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　25th　2012

  68. In-situ時間分解XAFS法を用いた燃料電池Pt-Co/Cカソード触媒の触媒構造速度論解析

    石黒志, 才田隆広, 永松伸一, 関澤央輝, 宇留賀朋哉, 山本孝, 横山利彦, 大越慎一, 唯美津木

    日本化学会講演予稿集　92nd　(2)　2012

    ISSN： 0285-7626

  69. In-situ空間分解顕微XAFS法による白金触媒微粒子の空間分解構造解析

    才田隆広, 石黒志, 関澤央輝, 宇留賀朋哉, 宇留賀朋哉, 鈴木基寛, 河村直己, 水牧仁一朗, 新田清文, 永松伸一, 長澤兼作, 今泉吉明, 山本孝, 横山利彦, 唯美津木

    電気化学会大会講演要旨集　79th　2012

  70. 走査型顕微XAFSを用いたNi/Ce2Zr2Ox酸化物固溶体触媒粒子の構造解析

    石黒志, 石黒志, 宇留賀朋哉, 谷田肇, 寺田靖子, 大越慎一, 唯美津木

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　24th　2011

  71. 走査型顕微XAFS法によるNi担持セリア-ジルコニア固溶体触媒粒子構造解析

    石黒志, 宇留賀朋哉, 寺田靖子, 大越慎一, 唯美津木

    日本化学会講演予稿集　91st　(2)　2011

    ISSN： 0285-7626

  72. 走査型顕微XAFS法によるNi担持セリア-ジルコニア酸化物固溶体触媒粒子構造解析

    石黒志, 石黒志, 宇留賀朋哉, 谷田肇, 寺田靖子, 大越慎一, 唯美津木

    X線分析討論会講演要旨集　47th　2011

Show all ︎Show first 5

Books and Other Publications 4

  1. リチウムイオン電池の長期安定に向けたマネジメント技術

    石黒志

    株式会社技術情報協会　2023/02/28

    ISBN: 9784861049385

  2. XAFS Techniques for Catalysts, Nanomaterials, and Surfaces

    M. Tada, N. Ishiguro

    Springer, Switzerland　2017

  3. PEFCの内部現象・反応機構と評価解析技術

    石黒 志

    S&T出版　2015

  4. 次世代燃料電池開発の最前線

    唯 美津木, 石黒 志

    シーエムシー出版　2013

Presentations 89

  1. X線タイコグラフィイメージングとX線吸収微細構造を組み合わせた顕微分光法による化学状態イメージング Invited

    石黒 志

    第75回コロイド及び界面化学討論会 一般シンポジウム 「NanoTerasu 先端研究を切り拓く若手研究者：コロイド界面化学との連携に期待　2024/09/19

  2. X線スペクトロタイコグラフィ法による機能性材料粒子のナノ化学状態イメージング Invited

    石黒志

    第37回日本放射光学会年会・放射光科学合同シンポジウム　2024/01/12

  3. 次世代画像検出器CITIUSを備えた高分解能X線タイコグラフィ装置の開発と応用

    大川成、石黒志、阿部真樹、上松英司、高澤駿太郎、佐々木雄平、尾崎恭介、西野玄記、小林和生、平木俊幸、城地保昌、初井宇記、高橋幸生

    第37回日本放射光学会年会・放射光科学合同シンポジウム　2024/01/12

  4. 三角形開口を用いたコヒーレントX線回折イメージングによるSn–Bi共晶はんだ合金粒子の溶融過程の観察

    高澤駿太郎、阿部真樹、上松英司、佐々木雄平、石黒志、高橋幸生

    第37回日本放射光学会年会・放射光科学合同シンポジウム　2024/01/12

  5. オペランドＸ線スペクトロタイコグラフィによる薄膜型全固体電池のナノスケール化学状態イメージング

    佐々木雄平、戸塚務、石黒志、阿部真樹、上松英司、高澤駿太郎、山本和生、入山恭寿、高橋幸生

    第37回日本放射光学会年会・放射光科学合同シンポジウム　2024/01/12

  6. Virtual singleｰpixel imagingに基づくX線タイコグラフィｰ蛍光顕微法の提案

    阿部真樹、石黒志、上松英司、高澤駿太郎、金子房恵、高橋幸生

    第37回日本放射光学会年会・放射光科学合同シンポジウム　2024/01/11

  7. Liイオン電池正極活物質のオペランドX線スペクトロタイコグラフィ計測用セルの開発

    上松英司、石黒志、川合航右、阿部真樹、高澤駿太郎、佐々木雄平、大川成、大久保將史、高橋幸生

    第37回日本放射光学会年会・放射光科学合同シンポジウム　2024/01/11

  8. In situ/Operando Chemical Imaging of Battery Materials Using X-ray Spectroscopic Ptychography Invited

    石黒志

    2023年日本表面真空学会学術講演会　2023/11/01

  9. Chemical state visualization using X-ray spectroscopic ptychography in SPring-8 Invited

    Nozomu Ishiguro

    SPIE, X-Ray Nanoimaging: Instruments and Methods VI　2023/08/24

  10. Chemical States Visualization of Cathode Active Materials by X-ray Spectroscopic Ptychogrphy Invited

    47TH INTERNATIONAL CONFERENCE AND EXPOSITION ON ADVANCED CERAMICS AND COMPOSITES, DAYTONA BEACH　2023/01/26

  11. Chemical Imaging of Li-rich Disordered Rocksalt-type Vanadium Oxide Particles Using Hard X-ray Spectroscopic Ptychography

    Hideshi Uematsu, Nozomu Ishiguro, Masaki Abe, Syuntaro Takazawa, Syuntaro Takazawa, Jungmin Kang, Itsuki Konuma, Naoaki Yabuuchi, Yukio Takahash

    47TH INTERNATIONAL CONFERENCE AND EXPOSITION ON ADVANCED CERAMICS AND COMPOSITES　2023/01/24

  12. 三角形開口を用いたコヒーレントX線回折イメージングによる溶液中金コロイド粒子の動画撮像

    高澤駿太郎, 阿部真樹, 上松英司, 石黒志, 星野大樹, Dam Hieu-Chi, 高橋幸生

    第36回日本放射光学会年会・放射光科学合同シンポジウム　2023/01/09

  13. Kramers-Kronig関係の性質を利用したスパースX線スペクトロタイコグラフィの提案

    石黒志, 高橋幸生

    第36回日本放射光学会年会・放射光科学合同シンポジウム　2023/01/09

  14. 硬X線スペクトロタイコグラフィによるLi過剰不規則岩塩型酸化物のLi脱離反応分布の可視化

    上松英司, 石黒志, 阿部真樹, 高澤駿太郎, 姜正敏, 小沼樹, 藪内直明, 高橋幸生

    第36回日本放射光学会年会・放射光科学合同シンポジウム　2023/01/09

  15. テンダーX線スペクトロタイコグラフィによるリチウム硫黄電池正極の硫黄化学状態イメージング

    阿部真樹, 金子房恵, 石黒志, 久保達也, 中条文哉, 為則雄祐, 岸本浩通, 高橋幸生

    第36回日本放射光学会年会・放射光科学合同シンポジウム　2023/01/09

  16. X線スペクトロタイコグラフィによる薄膜型全固体電池のオペランド化学状態イメージング

    佐々木雄平, 戸塚務, 石黒志, 上松英司, 高澤駿太郎, 山本和生, 入山恭寿, 高橋幸生

    第36回日本放射光学会年会・放射光科学合同シンポジウム　2023/01/07

  17. Development of Tender X-ray Spectroscopic Ptychography Mesasurement System and Its Application to Sulfur Chemical State Imaging of Sulfur-Containing Polymer

    Masaki Abe, Fusae Kaneko, Nozomu Ishiguro, Togo Kudo, Takahiro Matsumoto, Takaki Hatsui, Yusuke Tamenori, Hiroyuki Kishimoto, Yukio Takahashi

    XRM 2022　2022/06/22

  18. Ptychography–XAFS Imaging of Li-excess Rock-salt Type Vanadium Oxide Particles Synthesized by Mechanical Milling

    Ptychography–XAFS Imaging of, Li-excess Rock-sal, Type Vanadium, Oxide Particles Synthesized by Mechanical Milling」, Hideshi Uematsu, Nozomu Ishiguro, Masaki Abe, Shuntaro Takazawa, Jungmin Kang, Itsuki Konuma, Naoaki Yabuuchi, Yukio Takahashi

    2022/06/22

  19. Chemical State Nano-imaging of Functional Materials Particle by X-ray Spectroscopic Ptychography Invited

    Nozomu Ishiguro

    2022/05/12

  20. Nano-scale Chemical State Visualization of Functional Materials Using Hard X-ray Spectroscopic Ptychography Invited

    Nozomu Ishiguro

    Coherence 2022: International Conference on Phase Retrieval and Coherent Scattering　2022/07/08

  21. Development of single-frame coherent X-ray diffraction imaging using triangular aperture

    Shuntaro Takazawa, Jungmin Kang, Masaki Ave, Hideshi Uematsu, Nozomu Ishiguro, Yukio Takahashi

    2022/04/19

  22. 三⾓形開⼝を⽤いたシングルフレームコヒーレントX線回折イメージングのための光学系開発

    高澤駿太郎, 姜正敏, 阿部真樹, 上松英司, 石黒志, 高橋幸生

    第34回日本放射光学会年会・放射光科学合同シンポジウム　2022/01/09

  23. テンダーX線スペクトロタイコグラフィの開発と含硫⻩⾼分⼦粒⼦の化学状態イメージング

    阿部真樹, 金子房恵, 石黒志, 工藤統吾, 松本崇博, 初井 宇記, 為則雄祐, 岸本浩通, 高橋幸生

    第34回日本放射光学会年会・放射光科学合同シンポジウム　2022/01/08

  24. 全固体電池観察のための薄膜試料微細加⼯とX線顕微分光によるオペランド化学状態イメージングの検討

    戸塚務, 石黒志, 姜正敏, 山本和生, 入山恭寿, 高橋幸生

    第34回日本放射光学会年会・放射光科学合同シンポジウム　2022/01/08

  25. タイコグラフィ−XAFS法によるLi過剰岩塩型バナジウム酸化物粒⼦の微細組織・化学状態イメージング

    上松英司, 石黒志, 戸塚務, 阿部真樹, 高澤駿太郎, 姜正敏, 小沼樹, 藪内 直明, 高橋幸生

    第34回日本放射光学会年会・放射光科学合同シンポジウム　2022/01/08

  26. 放射光タイコグラフィ−XAFS 法を利用した電極活物質の構造−機能相関解析 Invited

    石黒 志

    新学術領域研究「蓄電固体界面科学」第3回若手勉強会　2022/01/07

  27. In Situ Visualization of Chemical States in Functional Materials Using X-ray Ptychography Imaging Invited

    Nozomu Ishiguro, Yukio Takahashi

    2021/12/21

  28. 3D imaging of distribution and local structure of Pt electrocatalyst in PEFC MEA by opernado CT-XAFS technique

    Hirosuke Matsui, Nozomu Ishiguro, Yuanyuan Tan, Naoyuki Maejima, Tomoya Uruga, Kotaro Higashi, Mizuki Tada

    The International Chemical Congress of Pacific Basin Societies 2021　2021/12/18

  29. テンダーX線領域におけるタイコグラフィ-XAFS法の開発と含硫黄高分子粒子の化学状態イメージング

    阿部真樹, 金子房恵, 石黒志, 為則雄祐, 岸本浩通, 高橋幸生

    第21回東北大学多元物質科学研究所発表会　2021/12/09

  30. 結像型CT-XAFSによる全固体電池合剤正極内の反応分布の 高解像度オペランド3次元計測

    木村 勇太, 黄 溯, 中村 崇司, 石黒 志, 関澤 央輝, 新田 清文, 宇留賀 朋哉, 竹内 友成, 奥村 豊旗, 唯 美津木, 内本 喜晴, 雨澤 浩史

    第47回固体イオニクス討論会　2021/12/10

  31. 三角形開口を用いたシングルフレームコヒーレントX線回折イメージング法の開発

    高澤駿太郎, 姜正敏, 阿部真樹, 上松英司, 石黒志, 高橋幸生

    Optics & Photonics Japan 2021　2021/10/29

  32. テンダーX線タイコグラフィの基盤技術開発と硫黄高分子材料観察への応用

    阿部真樹, 金子房恵, 石黒志, 工藤統吾, 松本崇博, 初井宇記, 為則雄祐, 岸本浩通, 高橋幸生

    SPring-8シンポジウム2021　2021/09/18

  33. タイコグラフィXAFS法により可視化した蓄電固体材料の化学状態不均一性

    上松英司, 石黒志, 阿部真樹, 高澤駿太郎, 姜正敏, 細野英司, 大久保将史, 高橋幸生

    第24回XAFS討論会　2021/09/01

  34. テンダーX線タイコグラフィXAFS法の開発と硫⻩化学状態のナノスケール分析への応用

    阿部真樹, 金子房恵, 石黒志, 工藤統吾, 松本崇博, 初井宇記, 為則雄祐, 岸本浩通, 高橋幸生

    第24回XAFS討論会　2021/09/01

  35. Nano-scale Chemical State Visualization of Functional Materials Using Ptychography-XAFS Invited

    Nozomu Ishiguro, Yukio Takahashi

    International Conference on X-ray Optics and Applications 2021 (XOPT2021)　2021/04/19

  36. コヒーレントX線の最先端利用 〜タイコグラフィーXAFSの機能性材料解析への応用〜 Invited

    石黒 志

    第61回SPring-8先端利用技術WS　2021/03/29

  37. Nano/Meso-scale Chemical State Visualization of Battery Materials Using X-ray Ptychography Imaging Invited

    Nozomu Ishiguro

    2021/02/22

  38. テンダーX 線領域におけるタイコグラフィ法の開発

    阿部真樹, 金子房恵, 石黒志, 為則雄祐, 岸本浩通, 高橋幸生

    第34回日本放射光学会年会・放射光科学合同シンポジウム　2021/01/09

  39. 三角形開口を用いたシングルフレームコヒーレント X 線回折イメージングの提案

    高澤駿太郎, 姜正敏, 阿部真樹, 上松英司, 石黒志, 高橋幸生

    第34回日本放射光学会年会・放射光科学合同シンポジウム　2021/01/09

  40. 硬 X 線タイコグラフィ XAFS 法による LiNi0.5Mn1.5O4 正極活物質粒子の化学状態可視化

    上松英司, 石黒志, 阿部真樹, 高澤駿太郎, 姜正敏, 細野英司, 大久保将史, 高橋幸生

    第34回日本放射光学会年会・放射光科学合同シンポジウム　2021/01/09

  41. 硬X線タイコグラフィXAFS法によるLiNi0.5Mn1.5O4正極活物質粒子の化学状態可視化

    上松英司, 石黒志, 阿部真樹, 高澤駿太郎, 姜正敏, 細野英司, 大久保将史, 高橋幸生

    第20回東北大学多元物質科学研究所発表会

  42. タイコグラフィXAFS計測による物質構造-機能相関の空間可視化 Invited

    石黒志

    第3回日本表面真空学会若手部会研究会　2020/11/27

  43. Nano/Meso-scale Chemical State Visualization of Functional Materials Using Ptychography-XAFS

    N. Ishiguro, Y. Takahashi

    The 4th Symposium for The Core Research Cluster for Materials Science and the 3rd Symposium on International Joint Graduate Program in Materials Science　2020/11/18

  44. Nano-scale Chemical State Visualization using Ptychography-XAFS Invited

    Nozomu Ishiguro

    Next Generation Spectro-Microscopy and Micro-Spectroscopy Workshop　2020/10/29

  45. テンダーＸ線タイコグラフィの基盤技術開発とその応用展開タイコグラフィXAFS計測による物質構造-機能相関の空間可視化

    阿部真樹, 金子房恵, 石黒志, 為則 雄祐, 岸本浩通, 高橋幸生

    SPring-8シンポジウム2020

  46. X線イメージングと分光の組み合わせによる機能性材料系の化学状態解析 Invited

    石黒志

    第12回日本放射光学会 放射光基礎講習会　2020/09/16

  47. タイコグラフィXAFS法による充放電過程におけるチタン酸リチウム粒子の化学状態可視化

    石黒志, 高橋幸生, 細野英司, 大久保將史

    日本セラミックス協会 第33回秋季シンポジウム　2020/09/02

  48. テンダーＸ線タイコグラフィの基盤技術開発とその応用展開タイコグラフィXAFS計測による物質構造-機能相関の空間可視化

    金子房恵, 広瀬真, 石黒志, 岸本浩通, 為則雄祐, 高橋幸生

    第32回日本放射光学会年会・放射光科学合同シンポジウム　2020/01/11

  49. マルチビームX線タイコグラフィによる広視野ナノイメージング

    広瀬真, 東野嵩也, 石黒志, 高橋幸生

    第32回日本放射光学会年会・放射光科学合同シンポジウム　2020/01/11

  50. その場X線タイコグラフィによるはんだ合金粒子の融解過程の観察

    東野嵩也, 広瀬真, 石黒志, 高橋幸生

    第32回日本放射光学会年会・放射光科学合同シンポジウム　2020/01/11

  51. Chemical State Imaging using Hard X-ray Spectro-Ptychography International-presentation Invited

    N. Ishiguro

    14th Asia-Pacific Physics Conference (APPC14)　2019/11

  52. X線スペクトロタイコグラフィー法による固体触媒材料の化学状態イメージング Invited

    石黒 志

    2019年日本表面真空学会学術講演会　2019/10

  53. Ptychographic Imaging Using Hard X-ray Multibeam International-presentation

    N. Ishiguro, M. Hirose, T. Higashino, Y. Takahashi

    The 15th Symposium of Japanese Research Community on X-ray Imaging Optics　2019/10

  54. イメージングXAFS法による固体触媒材料系の化学状態可視化 Invited

    石黒 志

    日本放射光学会若手研究会「放射光科学のための計測インフォマティクス」　2018/09

  55. XAFS Imaging of Ce2Zr2Ox Exhausting Catalyst Systems International-presentation Invited

    N. Ishiguro

    International Symposium on Advancement and Prospect of Catalysis Science & Technology　2018/07

  56. Visualization of Ce Chemical States and Oxygen Diffusion in Ceria-Zirconia Particles by X-ray Spectro-Ptychography International-presentation

    N. Ishiguro, M. Hirose, K. Shimomura, N. Burdet, H. Matsui, Y. Takahashi, M. Tada

    18th International Symposium on Relations between Homogeneous and Heterogeneous Catalysts (ISHHC18)　2018/07

  57. Chemical States Visualization Using Hard X-ray Spectro-Ptychography in SPring-8 International-presentation

    N. Ishiguro

    Ptycho-Developer 2019　2018/06

  58. タイコグラフィXAFSによるCe2Zr2Ox粒子内の酸素拡散分布の可視化

    石黒 志, 広瀬 真, 下村 啓, N. Burdet, 松井公佑, 高橋幸生, 唯美津木

    日本化学会第98回春季年会　2018/03

  59. 結像顕微XAFSによる樹状型FeOx粒子の酸化還元サイクルおけるFe化学状態の可視化

    石黒 志, 松井 公佑, 鈴木 陽也, 関澤 央輝, 新田 清文, 寺田 靖子, 宇留賀 朋哉, 唯 美津木

    第31回日本放射光学会年会　2018/01

  60. ADT Processes of Pt/C and Pt3Co/C PEFC Cathode Electrocatalysts Studied by Operando Time-resolved Quick-XAFS International-presentation

    N. Ishiguro, S. Kityakarn, O. Sekizawa, T. Uruga, H. Matsui, K. Nagasawa, T. Yokoyama, M. Tada

    国際シンポジウム“Future Earth”エネルギー課題に資する新奇なナノ物質・触媒・表面―その場&オペランドXAFS及びＸ線手法による物質研究、キャラクタリゼーション及びイメージング―　2017/10/28

  61. In situ Time-resolved XAFS Study for ADT Processes of Pt/C and Pt3Co/C PEFC Cathode Electrocatalysts International-presentation

    N. Ishiguro, S. Kityakarn, O. Sekizawa, T. Uruga, H. Matsui, K. Nagasawa, T. Yokoyama, M. Tada

    第16回日韓触媒シンポジウム及び第3回北海道大学触媒科学研究所国際シンポジウム　2017/05

  62. Structural Kinetics Study of Redox Processes of Pt/C and Pt3Co/C Cathode Electrocatalysts in a Polymer Electrolyte Fuel Cell during an Accelerated Durability Test by In Situ Time-Resolved XAFS International-presentation

    N. Ishiguro, S. Kityakarn, O. Sekizawa, T. Uruga, H. Matsui, K. Nagasawa, T. Yokoyama, M. Tada

    253rd ACS National Meeting　2017/04

  63. 結像顕微 XAFS 法による樹状型FeOx結晶粒子の化学状態イメージング

    石黒 志, 松井 公佑, 鈴木 陽也, 関澤 央輝, 新田 清文, 寺田 靖子, 宇留賀 朋哉, 唯 美津木

    日本化学会第97回春季年会　2017/03

  64. 結像顕微XAFS法による 樹状型FeOx粒子の化学状態イメージングの検討

    石黒 志, 松井 公佑, 鈴木 陽也, 関澤 央輝, 新田 清文, 寺田 靖子, 宇留賀 朋哉, 唯 美津木

    第30回日本放射光学会年会　2017/01

  65. 燃料電池電極触媒におけるin situ時間分解XAFS測定・解析の実際 Invited

    石黒 志

    X線スペクトロスコピー利用研究会 第3回会合　2016/03

  66. 空間分解 XAFS 法による固体触媒の構造・電子状態解析 Invited

    石黒 志

    第11回放射光表面科学研究部会顕微ナノ材料科学研究会合同シンポジウム　2016/03

  67. In situ 時間分解 XAFS 法を用いた固体高分子形燃料電池Pt/C及びPt3Co/Cカソード電極触媒 の劣化過程における構造速度論変化の検討

    石黒 志, K. Sutasinee, 宇留賀 朋哉, 関澤 央輝, 長澤 兼作, 横山 利彦, 唯 美津木

    日本化学会第96回春季年会　2016/03

  68. In situ時間分解XAFSを用いた燃料電池Pt/C及びPt3Co/Cカソード触媒の劣化過程における構造速度変化の検討

    石黒 志, K. Sutasinee, 宇留賀 朋哉, 関澤 央輝, 長澤 兼作, 横山 利彦, 唯 美津木

    第29回日本放射光学会年会　2016/01

  69. Mechanism of Redox Processes of Pt-M (M=Co, Ni) PEFC Cathode Electrocatalysts for Voltage Cycling Studied by In Situ Time-Resolved XAFS International-presentation

    N. Ishiguro, S. Kityakarn, O. Sekizawa, T. Uruga, K. Nagasawa, T. Yokoyama, M. Tada

    Pacifichem 2015　2015/12

  70. In situ Time-resolved XAFS Study for Rate Enhancements in PEFC Cathode Reactions on Pt3M (M=Co, Ni) Cathode Electrocatalysts International-presentation

    N. Ishiguro, S. Kityakarn, O. Sekizawa, T. Uruga, K. Nagasawa, T. Yokoyama, M. Tada

    17th International Symposium on Relations between Homogeneous and Heterogeneous Catalysts (ISHHC17)　2015/07

  71. In situ時間分解XAFSによる固体高分子形燃料電池Pt3M/C (M=Co,Ni)カソード電極触媒の構造速度論解析と反応活性化要因の検討

    石黒 志, K. Sutasinee, 宇留賀 朋哉, 関澤 央輝, 長澤 兼作, 横山 利彦, 唯 美津木

    日本化学会第95回春季年会　2015/03

  72. In-situ時間分解XAFS法を用いた実用触媒担持量MEA中のPt/Cカソード触媒の電圧操作過程における速度論的構造解析の検討

    石黒 志, 才田 隆広, 宇留賀 朋哉, 長澤 兼作, 関澤 央輝, 新田 清文, 横山 利彦, 唯 美津木

    第21回燃料電池シンポジウム　2014/05

  73. 硬X線ナノ集光ビームを用いた走査型顕微XAFS法によるPt/Ce2Zr2Ox触媒粒子内のCe酸化状態イメージング

    石黒 志, 宇留賀 朋哉, 関澤 央輝, 辻 卓也, 鈴木 基寛, 河村 直己, 水牧 仁一朗, 新田 清文, 横山 利彦, 唯 美津木

    日本化学会第94回春季年会　2014/03

  74. In situ Time-Resolved XAFS Studies of Voltage Cycling Processes on Pt3Co/C and Pt/C Cathode Catalyst in PEFC International-presentation

    N. Ishiguro, T. Saida, T. Uruga, O. Sekizawa, K. Nagasawa, T. Yamamoto, S. Ohkoshi, T. Yokoyama, M. Tada

    247th ACS National Meeting　2014/03

  75. X線ナノビームを用いた顕微XAFS法によるPt/Ce2Zr2Ox触媒粒子内のCe酸化状態のイメージング

    石黒 志, 宇留賀 朋哉, 関澤 央輝, 辻 卓也, 鈴木 基寛, 河村 直己, 水牧 仁一朗, 新田 清文, 横山 利彦, 唯 美津木

    第27回日本放射光学会年会　2014/01

  76. 燃料電池MEA内Pt/Cカソード触媒のin-situ時間分解XAFS構造解析

    石黒 志, 才田 隆広, 宇留賀 朋哉, 長澤 兼作, 関澤 央輝, 新田 清文, 山本 孝, 大越 慎一, 横山 利彦, 唯 美津木

    日本化学会第93回春季年会　2013/03

  77. 実用量のPt/Cカソード触媒を塗布したMEAにおけるin-situ時間分解XAFS解析

    石黒 志, 才田 隆広, 宇留賀 朋哉, 永松 伸一, 関澤 央輝, 新田 清文, 山本 孝, 岩澤 康裕, 大越 慎一, 横山 利彦, 唯 美津木

    第26回日本放射光学会年会　2013/01

  78. In-situ時間分解XAFS法を用いた燃料電池Pt-Co/Cカソード触媒の触媒構造速度論解析

    石黒 志, 才田 隆広, 宇留賀 朋哉, 永松 伸一, 関澤 央輝, 新田 清文, 山本 孝, 岩澤 康裕, 大越 慎一, 横山 利彦, 唯 美津木

    日本化学会第92回春季年会　2012/03

  79. In-situ時間分解XAFS法によるPt-Co/C燃料電池カソード触媒の触媒構造反応機構解析

    石黒 志, 才田 隆広, 宇留賀 朋哉, 永松 伸一, 関澤 央輝, 新田 清文, 山本 孝, 岩澤 康裕, 大越 慎一, 横山 利彦, 唯 美津木

    第25回日本放射光学会年会　2012/01

  80. Structure-Kinetic Analysis of Pt-Co/C Fuel Cell Cathode Catalyst by In-situ Time-resolved XAFS International-presentation

    N. Ishiguro, T. Saida, T. Uruga, S. Nagamatsu, O. Sekizawa, K. Nitta, T. Yamamoto, S. Ohkoshi, Y. Iwasawa, T. Yokoyama, M. Tada

    International Symposium and the Third Iwasawa Conference on Catalysis and Surface Science for Efficient Utilization of Carbon Resources and Related Topics　2011/12

  81. 走査型顕微XAFS法によるNi担持セリア-ジルコニア酸化物固溶体触媒粒子構造解析

    石黒 志, 宇留賀 朋哉, 谷田 肇, 寺田 靖子, 大越 慎一, 唯 美津木

    第47回X線分析討論会　2011/10

  82. In-situ時間分解XAFS法を用いたPt/CおよびPt3Co/C燃料電池カソード触媒の触媒構造反応機構解析

    石黒 志, 才田 隆広, 宇留賀 朋哉, 永松 伸一, 関澤 央輝, 新田 清文, 山本 孝, 岩澤 康裕, 大越 慎一, 横山 利彦, 唯 美津木

    第14回XAFS討論会　2011/09

  83. 走査型顕微XAFS法によるNi担持セリア-ジルコニア固溶体触媒粒子構造解析

    石黒 志, 宇留賀 朋哉, 谷田 肇, 寺田 靖子, 大越 慎一, 唯 美津木

    日本化学会第91回春季年会　2011/03

  84. 走査型顕微XAFSを用いたNi/Ce2Zr2Ox酸化物固溶体触媒粒子の構造解析

    石黒 志, 宇留賀 朋哉, 谷田 肇, 寺田 靖子, 大越 慎一, 唯 美津木

    第24回日本放射光学会年会　2011/01

  85. Structure Kinetics of Supported V-Oxide, Catalysts for Selective Ethanol Oxidation Studied by In-situ Time-resolved DXAFS and Raman Spectroscopy International-presentation

    N. Ishiguro, S. Muratsugu, D. Murakami, Y. Uemura, Y. Inada, M. Nomura, S. Ohkoshi, Y. Iwasawa, M. Tada

    Pacifichem 2010　2010/12

  86. In-situ時間分解ラマン分光による担持バナジウム酸化物触媒上でのエタノール選択酸化反応のリアルタイム構造解析

    石黒 志, 邨次 智, 大越 慎一, 唯 美津木

    第8回ナノ学会　2010/05

  87. In-situ 時間分解ラマン分光による担持バナジウム触媒のエタノール選択酸化反応の動的解析

    石黒 志, 大越 慎一, 唯 美津木

    日本化学会第90回春季年会　2010/03

  88. 固定化Ru3クラスターモレキュラーインプリンティング触媒の設計と選択的ニトリル水素化反応

    石黒 志, 唯 美津木, 岩澤 康裕

    日本化学会第89回春季年会　2009/03

  89. 表面固定化Ruクラスターを用いた選択的ニトリル水素化反応

    石黒 志, 唯 美津木, 岩澤 康裕

    第102回触媒討論会　2008/10

Show all Show first 5

Research Projects 9

  1. Construction of a platform for visualization of microscopic non-equilibrium states using super ptychography

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Specially Promoted Research

    Institution: Tohoku University

    2023/04/01 - 2030/03/31

  2. イオン渋滞現象の解明に向けた高度計測技術の統合利用

    中村 崇司, 桑田 直明, 吉田 秀人, 阿部 仁, 杉本 敏樹, 山内 美穂, 梅垣 いづみ, 石黒 志, 森 一広, 白澤 徹郎

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 学術変革領域研究(A)

    Institution: 名古屋大学

    2024/04/01 - 2029/03/31

  3. Visualization of lithium-ion diffusion in cathode active materials particles in all solid-state battery

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2022/04/01 - 2025/03/31

  4. Integrated Studies on Interface Ionics by Advanced Analytical Techniques

    Amezawa Koji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2019/06/28 - 2024/03/31

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    The aim of this study was to systematically understand the unique ion transport and storage properties observed at the solid-state ionic interface by measuring the modulation and distribution of various physical/chemical states near the interface by using various analytical techniques and integrating these findings. Various advanced measurement techniques are developed for the analysis of the solid-state ionic interface. Common model hetero-interface system (cathode/electrolyte interface in all-solid-state batteries) and a common model homo-interface system (crystalline/amorphous interface in glass-ceramic solid electrolytes) were selected within this research project, and the developed advanced analytical techniques were applied. It was found that the modulation of physical/chemical states and associated unique phenomena observed at the solid-state ionic interface can be well-interpreted by considering the chemical potential of movable components.

  5. Creation of platform for the next generation synchrotron radiation microspectroscopy by multi-dimensional X-ray ptychography

    TAKAHASHI Yukio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)

    Category: Grant-in-Aid for Scientific Research (S)

    2018/06/11 - 2023/03/31

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    By upgrading the ptychography-XAFS method with X-ray optics and informatics approaches, we have established multidimensional X-ray ptychography to visualize nanoscale structures and chemical states inside micrometer-order bulk samples. A platform for synchrotron radiation nanospectroscopic imaging utilizing multidimensional X-ray ptychography was established by promoting applied research on the elucidation of the correlation between nanostructures and function of various practical materials such as catalyst materials, battery materials, and solder materials at several beamlines of SPring-8.

  6. Chemical State Visualization of Battery Materials by Operando X-ray Spectro-Ptychography

    Ishiguro Nozomu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists

    Category: Grant-in-Aid for Early-Career Scientists

    Institution: Tohoku University

    2020/04/01 - 2022/03/31

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    In this study, various imaging XAFS measurements, including tychographic XAFS, were performed to visualize the chemical state distribution of lithium battery cathode active material particles and the electrode interface during the charge-discharge process. The aim of this study was to extract unknown structure-function correlations related to ion transport and diffusion phenomena within and at particle interfaces. Tychographic XAFS measurements inside spinel-type lithium manganese-nickelate (LNMO) particles have been performed, and the distributions suggesting heterogeneity of Mn and Ni compositions and chemical states within LNMO particles have been successfully captured. In addition, we succeeded in visualizing the internal chemical state of the LNMO particles by conducting measurement experiments on Li-rich vanadium oxide cathode active materials and thin-film all-solid-state battery systems.

  7. オペランドタイコグラフィXAFS計測によるリチウム二次電池正極材料の化学状態可視化

    Offer Organization: 公益財団法人 池谷科学技術振興財団

    System: 2021年度 単年度研究助成

    Institution: 東北大学

    2021/04 - 2022/03

  8. Chemical State Visualization of FeOx Catalyst Particles by In Situ Full-Field Imaging XAFS

    Ishiguro Nozomu, TADA Mizuki, MATSUI Hirosuke, URUGA Tomoya, TAKAHASHI Yukio, SEKIZAWA Oki, NITTA Kiyofumi, SUZUKI Yoya, HIROSE Makoto

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Institute of Physical and Chemical Research

    2016/04/01 - 2018/03/31

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    Visualization of chemical states of heterogeneous solid catalysts was investigated by imaging XAFS techniques to reveal relationships between their non-uniform structure and activity. Two topics as in blow were reported here. (1) Fe chemical state of dendrite FeOx and FeCrOx were visualized by full-field imaging XAFS with 50 nm spatial-resolution, and phase-transition tendency in FeOx and FeCrOx particles during redox reaction were discussed. (2)Ce chemical state of Ce2Zr2Ox (x=7-8) particles were successfully visualized by ptychographic-XAFS with less than 50 nm spatial resolution. Several types of local correlations found between the Ce density and Ce valence images indicated the existence of several oxidation behaviors in the oxygen storage process in the Ce2Zr2Ox particles.

  9. Hard X-ray XAFS Imaging for The Visualization of Heterogeneous Solid Catalysts

    TADA Mizuki, MATSUI Hirosuke, ISHIGURO Nozomu, MURATSUGU Satoshi, HUANG Xiubing, WANG Fei, MIYAMOTO Shota, ENOMOTO Kaori, SUZUKI Yoya, TAGUCHI Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Nagoya University

    2014/04/01 - 2017/03/31

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    XAFS imaging techniques combining X-ray absorption fine structure and imaging techniques have been developed to visualize the spatial structures of heterogeneous catalysts. Scanning nano-XAFS using focused X-ray nanobeam was applied to Ce-Zr mixed oxide solid-solution particles for automobile exhausting processes. The distribution of Ce oxidation states in the Ce-Zr mixed oxide particles was imaged for their oxygen storage and release processes, showing different reaction modes for the oxygen storage and release processes. We also developed imaging XAFS using a zone plate and CT-XAFS and applied them to visualize the phase transitions of iron oxide crystals and the distribution of electrocatalysts.

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