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Satoshi Kameoka

Section

Institute of Multidisciplinary Research for Advanced Materials

Job title

Professor

Degree

博士（工学）（筑波大学）
修士（工学）（筑波大学）

researchmap

https://researchmap.jp/tagen

J-GLOBAL ID

201801010042007955

Research History 7

2020/09 - Present

Tohoku University　Institute of Multidisciplinary Research for Advanced Materials　Professor
2007/04 - 2020/08

Tohoku University　Institute of Multidisciplinary Research for Advanced Materials
2006/11 - 2007/03

Tohoku University　Institute of Multidisciplinary Research for Advanced Materials
2004/04 - 2006/10

Tohoku University　Institute of Multidisciplinary Research for Advanced Materials
2002/04 - 2004/03

物質・材料研究機構　特別研究員
1999/04 - 2002/03

University of Tsukuba　Institute of Materials Science
1996/10 - 1999/03

科学技術振興事業団　科学技術特別研究員

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Education 1

筑波大学大学院博士課程　工学研究科　物質工学専攻

- 1996/03

Committee Memberships 7

日本金属学会　東北地区代議員

2021/03 - Present
日本金属学会　No. 78 触媒材料の金属学研究会代表幹事

2017/03 - 2023/02
日本金属学会　分科会委員（第二分科）

2015/04 - 2021/02
触媒学会　東日本地区幹事

2011/03 - 2013/02
触媒学会　会誌編集委員

2009/03 - 2012/02
日本金属学会　会誌編集委員

2007/04 - 2011/03
触媒学会　東日本地区代議員

2008/03 - 2010/02

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Professional Memberships 2

CATALYSIS SOCIETY OF JAPAN
THE JAPAN INSTITUTE OF METALS AND MATERIALS

Research Interests 4

Quasicrystalline catalyst
Intermetallic compound
Metallic catalytic materials
Catalyst

Research Areas 1

Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Catalytic processes and resource chemistry /

Papers 128

Temperature-driven structural and morphological changes in nitrogen-doped carbon nanofibers synthesized via LaNi5Pt1.0 intermetallic catalyst Peer-reviewed

Jenisha Daisy Priscillal, Sea-Fue Wang, Satoshi Kameoka

Diamond and Related Materials　151　111778-111778　2025/01
Publisher: Elsevier BV
DOI： 10.1016/j.diamond.2024.111778 　

ISSN： 0925-9635
Selective Hydrothermal Leaching of Aluminum from Al3YRhx (x = 0, 0.2, 0.5, 1.0) Intermetallic Compounds: The Effect of Rh Variants in Comparing the Catalytic CO Oxidation and CO-PROX Reactions Peer-reviewed

Balasubramanian Sriram, Sea-Fue Wang, Satoshi Kameoka

ACS Materials Au　2024/11/29
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acsmaterialsau.4c00140 　

ISSN： 2694-2461

eISSN： 2694-2461
Investigating Antibacterial Activity of Copper-Silver-Cerium Alloys Peer-reviewed

Chen-Ying Su, Satoshi Kameoka, Yu-Cheng Tsai, Qiao-Ping Cheng, Shu-Hsuan Wu, Yi-Xin Liu, Hsu-Wei Fang

Metals　14　(12)　1323-1323　2024/11/22
Publisher: MDPI AG
DOI： 10.3390/met14121323 　

eISSN： 2075-4701

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Antibacterial alloys are widely applied to reduce the incidence of medical-implant-associated infection. Copper (Cu) and silver (Ag) are commonly used in antibacterial alloys; however, rare earth elements, such as Cerium (Ce), are now gaining attention because their low trace is sufficient for killing bacteria. Accordingly, the antibacterial activity of Copper48-Silver48-Cerium4 (CuAgCe4) alloys with different crystalline structures was investigated. The immersion approach was employed for alloys cultured with Escherichia coli, and a direct contact method was used for alloys cultured with Staphylococcus aureus. Surface morphology was observed when alloys were made, and the crystalline structures of alloys were examined before and after being cultured with bacteria. The immersion method revealed that all the CuAgCe4 alloy samples could inhibit the growth of Escherichia coli, and the crystallized structures were distorted after the alloys were cultured with bacteria. Conversely, the direct contact approach showed the crystalline structures of CuAgCe4 alloys remained unchanged after the culture with Staphylococcus aureus, thereby indicating that the antibacterial activity did not correspond to the crystalline structures. Despite the lack of clarity surrounding the possible antibacterial mechanisms of CuAgCe4 alloy, the current findings demonstrate the potential antibacterial effects of CuAgCe4 alloy in medical implants.
A Comparative Study of Hydrothermally Leached Al3TM and Al3TM‐Rh (TM= Zr, V, Ce) Intermetallic Compounds for Catalytic Oxidation of Carbon Monoxide Peer-reviewed

Sriram Balasubramanian, Sea-Fue Wang, Satoshi Kameoka

ChemSusChem　e202401444　2024/09/02
Publisher: Wiley
DOI： 10.1002/cssc.202401444 　

ISSN： 1864-5631

eISSN： 1864-564X

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Rise of the mute assassin "carbon monoxide (CO)" levels impact all aerobic life. The elevated rates of CO concentration endure climatic and geographical characteristics that exacerbate air pollution. Herein, a simple approach for hydrothermal leaching (HyTL) of Al3TM‐Rh0.5 (Target material (TM) = Zr, V, Ce) and Al3TM (TM = Zr, V, Ce) intermetallic compounds produces leached products of ZrO2, VO2, and CeO2 with Rhodium (Rh) as an active component. The characterization result reveals the HyTL process and the presence of the active Rh element that elevated the performance of HyTL‐Al3Zr‐Rh0.5 towards CO conversion compared to other samples. Further, the cubic ZrO2 phase selectively forms after HyTL at 130 oC even though the formation of the cubic ZrO2 phase takes place at a high temperature. Moreover, the presence of Rh promotes higher catalytic activity in all the cases with low temperatures. The advancement in the present study towards the catalytic oxidation of CO over the hydrothermally leached ZrO2–Rh nanocatalyst guarantees the perspective of the aggregation‐activation process.
Promotional Effects of Heat Treatments on Pt–CeO2 Nanocatalyst Derived via Hydrothermal Leaching for CO Oxidation Peer-reviewed

Sea-Fue Wang, Narasimha Murthy Umesh, Satoshi Kameoka, Balasubramanian Sriram

ACS Applied Nano Materials　7　(12)　14372-14379　2024/06/12
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acsanm.4c01856 　

ISSN： 2574-0970

eISSN： 2574-0970
Effect of polyvinylpyrrolidone concentration on optical properties of CuCrO2 thin films Peer-reviewed

Homg-Ming Su, Chung-Lun Yu, Satoshi Kameoka, Po-Chou Chen, Naratip Vittayakorn, Te-Wei Chiu

Thin Solid Films　797　140334-140334　2024/05
Publisher: Elsevier BV
DOI： 10.1016/j.tsf.2024.140334 　

ISSN： 0040-6090
Influence of platinum content (X) in the LaNi5PtX catalyst and reaction conditions on the properties of ferromagnetic Ni-filled CNTs Peer-reviewed

I. Jenisha Daisy Priscillal, Sea-Fue Wang, Satoshi Kameoka

Ceramics International　50　(6)　8907-8916　2024/03
Publisher: Elsevier BV
DOI： 10.1016/j.ceramint.2023.12.206 　

ISSN： 0272-8842
Preparation of Zeolitic Imidazolate Framework and Carbon Nanofiber Composites for Nitrofurazone Detection Peer-reviewed

Haobo Wang, Subramanian Sakthinathan, Arjunan Keyan, Chung-Lun Yu, Satoshi Kameoka, Te-Wei Chiu, Karuppiah Nagaraj

Micro　4　(1)　14-32　2024/01/09
Publisher: MDPI AG
DOI： 10.3390/micro4010002 　

eISSN： 2673-8023

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Metal–organic frame (MOF) materials may have the advantages of a regular pore structure, large porosity, and large specific surface area, which could provide better catalytic activity, but they have some disadvantages in electrocatalysis. In contrast, carbon nanofibers (CNFs) prepared by electrospinning methods have good conductivity and stability. Therefore, this research aimed to generate MOF/CNFs composite materials to improve the electrochemical properties of MOF materials and apply them to the field of electrochemical sensing. This experiment was based on the preparation of straight unidirectional CNFs by an electrospinning method at 2000 RPM. The original method of preparing zeolitic imidazolate frameworks (ZIF-8) was improved and ZIF-8 was uniformly dispersed on the surface of CNFs to form a ZIF-8/CNF composite with a fiber diameter of about 0.10 to 0.35 µm. The specific surface area of the CNFs was about 42.28 m2/g, while that of the ZIF-8/CNF composite was about 999.82 m2/g. The specific surface area of the ZIF-8/CNF composite was significantly larger than that of CNFs. The GCE/ZIF-8/CNF electrode had an excellent electrochemical reaction, with an oxidation peak at about 216 μA, which proved that the ZIF-8/CNF composite material would have good catalytic activity and excellent electrochemical properties for the detection of nitrofurazone compared to other modified electrodes.
ZnCrXFe2-XO4 (X = 0–2) porous powder prepared through self-combustion glycine nitrate process and applied to methyl alcohol steam reforming for production of pure hydrogen Peer-reviewed

Ti-Hsuan Wu, Chung-Lun Yu, Jui-Hung Chen, Jhong-Ren Huang, Subramanian Sakthinathan, Satoshi Kameoka, Te-Wei Chiu, Chia-Cheng Lin, Liangdong Fan, Yi-Hsuan Lee, Po-Chou Chen

International Journal of Hydrogen Energy　49　724-735　2024/01
Publisher: Elsevier BV
DOI： 10.1016/j.ijhydene.2023.11.067 　

ISSN： 0360-3199
Influence of Reaction Parameters on the Structural and Morphological Properties of Carbon Nanocoils Synthesized Using Al3Y and Effect of Rh Addition Peer-reviewed

I. Jenisha Daisy Priscillal, Sea-Fue Wang, Satoshi Kameoka

MATERIALS TRANSACTIONS　64　(12)　2700-2707　2023/12/01
Publisher: Japan Institute of Metals
DOI： 10.2320/matertrans.mt-mh2022011 　

ISSN： 1345-9678

eISSN： 1347-5320
Co₂FeGe Heusler Alloy Nanoparticle Catalysts for Propyne Hydrogenation and Ammonia Decomposition

Takayuki Kojima, Yuki Nakaya, Souta Tate, Satoshi Kameoka, Shinya Furukawa

ChemistryOpen　12　(11)　2023/11/06
Publisher: Wiley
DOI： 10.1002/open.202300131 　

ISSN： 2191-1363

eISSN： 2191-1363

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Abstract Heusler alloys (X₂YZ) can be a candidate for new catalysts as well as other intermetallic compounds. We previously found good catalytic properties of Co₂FeGe for selective hydrogenation of alkynes and developed nanoparticles of Co₂FeGe supported on SiO₂. However, the average diameter of the nanoparticles was 23 nm, which is not small enough compared to those of state‐of‐the‐art nanoparticle catalysts. In this study, we developed SiO₂‐supported Co₂FeGe nanoparticles of <10 nm in diameter. A catalytic test for selective hydrogenation of propyne indicated a partial formation of sites with low selectivity including excess Co atoms. For ammonia decomposition, enhancement of turnover frequency was achieved by reducing the particle size.
Thermal Stability and CO Oxidation Property of Non-Equilibrium Pd–Ru Alloy Catalyst Peer-reviewed

Takeru Fukushima, Ryota Tsukuda, Satoshi Ohhashi, Nobuhisa Fujita, Satoshi Kameoka

MATERIALS TRANSACTIONS　64　(10)　2440-2444　2023/10/01
Publisher: Japan Institute of Metals
DOI： 10.2320/matertrans.mt-mh2022010 　

ISSN： 1345-9678

eISSN： 1347-5320
Investigation on the influence of reaction temperature on the structural and magnetic properties of morphologically diverse carbon nanotubes synthesized using LaNi5Pt0.5 alloy catalyst Peer-reviewed

I. Jenisha Daisy Priscillal, Sea-Fue Wang, Satoshi Kameoka

Journal of Alloys and Compounds　958　170355-170355　2023/10
Publisher: Elsevier BV
DOI： 10.1016/j.jallcom.2023.170355 　

ISSN： 0925-8388
Surface Characterization and NO + CO Reaction Activity of Rolled Cu Foil Peer-reviewed

黒須望実, 千星聡, 亀岡聡

銅と銅合金　62　(1)　237-241　2023/08

ISSN： 1347-7234
One-step synthesis of non-equilibrium Pd-Ru alloys from Al-Pd-Ru quasicrystals and approximants Peer-reviewed

Takeru Fukushima, Ryota Tsukuda, Satoshi Ohhashi, Nobuhisa Fujita, Satoshi Kameoka

Journal of Physics: Conference Series　2461　(1)　012001-012001　2023/03/01
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/2461/1/012001 　

ISSN： 1742-6588

eISSN： 1742-6596

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Abstract Non-equilibrium Pd–Ru alloys were synthesized by leaching quasicrystal (icosahedral quasicrystal, IQC: Al₇₁Pd₁₉Ru₁₀) and approximants (3/2 approximant, P₄₀: Al₇₂Pd_16.4Ru_11.6, 1/1 approximant, C₁: Al_70.4Pd_14.7Ru_14.9) of Al–Pd–Ru alloys with 20 wt% NaOH aqueous solution. The Pd-Ru alloys were investigated using XRD and HAADF-STEM, which showed that Pd and Ru were mixed and formed a non-equilibrium state (atomic ratio: 0.9 < Pd/Ru < 2). The Pd–Ru alloy obtained by leaching of P₄₀ phase was found to exhibit high catalytic performance toward CO oxidation than Pd and Ru catalysts obtained by leaching of Al₃Pd (decagonal quasicrystal) and Al₁₃Ru₄ (decagonal approximant), respectively (i.e., the alloying effect). Consequently, Al-Pd-Ru quasicrystals and approximant alloys are found to be useful precursors to obtain the non-equilibrium Pd-Ru alloys.
Promotional effects of Pt–CeO2 fabricated by hydrothermal leaching of Al78Ce22-xPtx (x = 0, 0.1) intermetallic compound for efficient catalytic CO oxidation Peer-reviewed

Narasimha Murthy Umesh, Sea-Fue Wang, Satoshi Kameoka

Journal of Solid State Chemistry　309　122984-122984　2022/05
Publisher: Elsevier BV
DOI： 10.1016/j.jssc.2022.122984 　

ISSN： 0022-4596
Catalytic Hydrogenation of C2H2 over Amorphous CeNi2Hx and Crystalline CeNi2: Effects of Hydrogen-Induced Amorphization and Oxidation Peer-reviewed

Ryota Tsukuda, Satoshi Ohhashi, Ya Xu, Chikashi Nishimura, Satoshi Kameoka

MATERIALS TRANSACTIONS　63　(3)　343-350　2022/03/01
Publisher: Japan Institute of Metals
DOI： 10.2320/matertrans.mt-m2021202 　

ISSN： 1345-9678

eISSN： 1347-5320
High Catalytic Activities of RENi5–xAlx (RE = La, Er) and Low Activity of Mg2Ni Following Hydrogen Uptake: The Role of Absorbed Hydrogen Peer-reviewed

Ryota Tsukuda, Takayuki Kojima, Ya Xu, Chikashi Nishimura, Marian Krajčí, Satoshi Kameoka

The Journal of Physical Chemistry C　125　(38)　20919-20929　2021/09/30
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acs.jpcc.1c06484 　

ISSN： 1932-7447

eISSN： 1932-7455
NO + CO Reaction on Polycrystalline Palladium Foils with Specific Surface Crystallographic Orientation: A New Approach to Develop Foil Catalysts Based on Texture Control Peer-reviewed

Kenta Hayashi, Satoshi Kameoka, An-Pang Tsai

MATERIALS TRANSACTIONS　62　(8)　1089-1096　2021/08/01
Publisher: Japan Institute of Metals
DOI： 10.2320/matertrans.mt-m2021050 　

ISSN： 1345-9678

eISSN： 1347-5320
High catalytic performance of Al–Pd–(Ru, Fe) icosahedral approximants for acetylene semi-hydrogenation Peer-reviewed

Keishi Abe, Ryota Tsukuda, Nobuhisa Fujita, Satoshi Kameoka

RSC Advances　11　(25)　15296-15300　2021/05
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d1ra01958a 　

eISSN： 2046-2069

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The Al–Pd–(Ru, Fe) icosahedral approximants exhibited high catalytic ethylene selectivity and stability for semi-hydrogenation of acetylene.
Effect of strong metal-oxide interaction on low-temperature ethanol reforming over Fe-promoted Rh/SiO2 catalyst Peer-reviewed

Shin-ichi Ito, Satoshi Kameoka

Applied Catalysis A: General　617　118113-118113　2021/05
Publisher: Elsevier BV
DOI： 10.1016/j.apcata.2021.118113 　

ISSN： 0926-860X
Durability and activity of Co2YZ (Y = Mn or Fe, Z = Ga or Ge) Heusler alloy catalysts for dehydrogenation of 2-propanol Peer-reviewed

Takayuki Kojima, Takuya Koganezaki, Shinpei Fujii, Satoshi Kameoka, An-Pang Tsai

Catalysis Science & Technology　11　(14)　4741-4748　2021
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d1cy00279a 　

ISSN： 2044-4753

eISSN： 2044-4761

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Using dehydrogenation of 2-propanol as a test reaction for Heusler alloy catalysts, durability against oxidation and a relationship between activity and electronic structures were revealed.
Synthesis of Co2FeGe Heusler alloy nanoparticles and catalysis for selective hydrogenation of propyne Peer-reviewed

Takayuki Kojima, Yuki Nakaya, Hyungwon Ham, Satoshi Kameoka, Shinya Furukawa

RSC Advances　11　(29)　18074-18079　2021

DOI： 10.1039/d1ra02884g 　

eISSN： 2046-2069
Au3Si4– and Au4Si4: Electronically Equivalent but Different Polarity Superatoms International-journal Peer-reviewed

Kiichirou Koyasu, Kazuyuki Tsuruoka, Satoshi Kameoka, An-Pang Tsai, Tatsuya Tsukuda

The Journal of Physical Chemistry A　124　(38)　7710-7715　2020/09/24
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acs.jpca.0c05592 　

ISSN： 1089-5639

eISSN： 1520-5215

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A series of Au x Si4- cluster anions (x = 1-4) were generated most abundantly by laser ablation of a Au4Si alloy target. Photoelectron spectroscopy and density functional theory (DFT) calculation of Au x Si4- (x = 1-4) revealed that Au3Si4- can be viewed as an electronically closed superatom and is composed of a Si4 unit whose three adjacent edges are bridged by three Au atoms. Such phase-segregated structure is facilitated by aurophilic interaction between the three Au atoms and results in a large permanent dipole moment (4.43 D). DFT calculations on an electronically equivalent superatom Au4Si4 predicted a new structure in which the uncoordinated Si atom of Au3Si4- is bonded by Au+. This Au4Si4 is much more stable than a cubic structure previously reported and has a large HOMO-LUMO gap (1.68 eV) and a small permanent dipole moment (0.41 D).
Hydrogenation of acetylene and propyne over hydrogen storage ErNi5-Al alloys and the role of absorbed hydrogen Peer-reviewed

Ryota Tsukuda, Takayuki Kojima, Daisuke Okuyama, Satoshi Kameoka, Chikashi Nishimura, An-Pang Tsai

International Journal of Hydrogen Energy　45　(38)　19226-19236　2020/07
Publisher: Elsevier BV
DOI： 10.1016/j.ijhydene.2020.05.062 　

ISSN： 0360-3199
Characterization of new catalysts prepared by in-situ activation of Ce50Ni50-xAux intermetallic compounds for CO oxidation Peer-reviewed

Yung-Han Huang, Sea-Fue Wang, An-Pang Tsai, Satoshi Kameoka

Intermetallics　120　106748-106748　2020/05
Publisher: Elsevier BV
DOI： 10.1016/j.intermet.2020.106748 　

ISSN： 0966-9795
Highly dispersive Au nanoparticles on TiO2 nanofibers as a supported catalyst synthesized from Al-Ti-Au intermetallic compound Peer-reviewed

Y.X. Liu, S. Ohhashi, S. Kameoka, A.P. Tsai

Chemical Engineering Science　211　115249　2020/01
Catalytic Properties of Heusler Alloys for Steam Reforming of Methanol Peer-reviewed

T. Kojima, S. Kameoka, A.-P. Tsai

ACS Omega　4　(26)　21666-21674　2019/12

DOI： 10.1021/acsomega.9b01837 　
Ability of hydrogen storage CeNi5-xGax and Mg2Ni alloys to hydrogenate acetylene Peer-reviewed

R. Tsukuda, R. Yamagishi, S. Kameoka, C. Nishimura, A.P. Tsai

Science and Technology of Advanced Materials　20　774-785　2019/12
Origins of catalysis for CO oxidation on porous Ag fabricated by leaching of intermetallic Mg3Ag Peer-reviewed

M.H. Liu, S. Kameoka, K. Nishimoto, S. Ueda, A.P. Tsai

Applied Catalysis, A: General　586　117216　2019/09
Carbon fibers having nano-arched structure on Co-supersaturated Cu foils Peer-reviewed

T. Ordaira, S. Kameoka, M. Aono, M. Terauchi, A.P. Tsai

Carbon　147　154-156　2019/06
Enhanced catalytic activity of inhomogeneous Rh-based solid-solution alloy nanoparticles Peer-reviewed

Md Samiul Islam Sarker, Takahiro Nakamura, Satoshi Kameoka, Yuichiro Hayasaka, Shu Yin, Shunichi Sato

RSC Advances　9　(9)　38882-38890　2019

DOI： 10.1039/c9ra06167c 　

eISSN： 2046-2069
FeNi and Fe16N2 Magnets Prepared Using Leaching Peer-reviewed

T. Kojima, S. Kameoka, M. Mizuguchi, K. Takanashi, A. P. Tsai

Materials Transactions　2019

DOI： 10.2320/matertrans.M2019019 　
Highly selective semi-hydrogenation of acetylene over porous gold with twin boundary defects Peer-reviewed

S. Kameoka, M. Krajci, A.P. Tsai

Applied Catalysis, A: General　569　101-109　2019
Effects of Cu oxidation states on the catalysis of NO+CO and N2O+CO reactions Peer-reviewed

H. Iwamoto, S. Kameoka, Y. Xu, C. Nishimura, A.P. Tsai

Journal of Physics and Chemistry of Solids　125　64-73　2019
Catalysis-tunable Heusler alloys in selective hydrogenation of alkynes: A new potential for old materials Peer-reviewed

Takayuki Kojima, Satoshi Kameoka, Shinpei Fujii, Shigenori Ueda, An-Pang Tsai, 月プレスリリース

Science Advances　4　(10)　eaat6063　2018/10
Publisher: American Association for the Advancement of Science ({AAAS})
DOI： 10.1126/sciadv.aat6063 　
Fine-tuning of catalysis using Heusler alloys in selective hydrogenation of alkyne: A new potential for old materials Peer-reviewed

T. Kojima, S. Kameoka, S. Fujii, S. Ueda, A.P. Tsai

Science Advance　4　eaat6063　2018/10
Probing Single Pt Atoms in Complex Intermetallic Al13Fe4 Peer-reviewed

Tsunetomo Yamada, Takayuki Kojima, Eiji Abe, Satoshi Kameoka, Yumi Murakami, Peter Gille, An Pang Tsai

Journal of the American Chemical Society　140　(11)　3838-3841　2018/03/21
Publisher: American Chemical Society
DOI： 10.1021/jacs.7b13658 　

ISSN： 1520-5126 0002-7863
Fast oxidation of porous Cu induced by nano-twinning Peer-reviewed

K. Nishimoto, M. Krajci, T. Sakurai, H. Iwamoto, M. Onoda, C. Nishimura, J.T Tsai, S.F. Wang, S. Kameoka, A.P. Tsai

Inorganic Chemistry　57　2908-2916　2018/03

DOI： 10.1021/acs.inorgchem.7b03225 　
Intermetallic: A Pseudoelement for Catalysis Published as part of the Accounts of Chemical Research special issue "Advancing Chemistry through Intermetallic Compounds" Invited Peer-reviewed

A. P. Tsai, S. Kameoka, K. Nozawa, M. Shimoda, Y. Ishii

ACCOUNTS OF CHEMICAL RESEARCH　50　(12)　2879-2885　2017/12

DOI： 10.1021/acs.accounts.7b00476 　

ISSN： 0001-4842

eISSN： 1520-4898
Understanding the catalytic activity of nanoporous gold: Role of twinning in fcc lattice Peer-reviewed

Marian Krajci, Satoshi Kameoka, An-Pang Tsai

JOURNAL OF CHEMICAL PHYSICS　147　(4)　044713　2017/07

DOI： 10.1063/1.4994701 　

ISSN： 0021-9606

eISSN： 1089-7690
Hydrogenation of Propyne Verifying the Harmony in Surface and Bulk Compositions for Fe-Ni Alloy Nanoparticles Peer-reviewed

T. Kojima, S. Fujieda, G. Kato, S. Kameoka, S. Suzuki, A.-P. Tsai

Materials Transactions　58　(5)　776-781　2017/04/25

DOI： 10.2320/matertrans.MBW201606 　

ISSN： 1345-9678

eISSN： 1347-5320
Oxide composite prepared from intermetallic and amorphous Zr67Fe30M3 (M=Au, Pt) alloys and their catalytic activity for CO oxidation Peer-reviewed

Yung-Han Huang, Sea-Fue Wang, Satoshi Kameoka, Kanji Miyamoto, An-Pang Tsai

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　100　49-56　2017/01

DOI： 10.1016/j.jpcs.2016.09.010 　

ISSN： 0022-3697

eISSN： 1879-2553
Creating the hydrogen absorption capability of CeNi5 through the addition of Al Peer-reviewed

R. Yamagishi, T. Kojima, S. Kameoka, D. Okuyama, T. J. Sato, C. Nishimura, A.-P. Tsai

International Journal of Hydrogen Energy　42　(34)　21832-21840　2017

DOI： 10.1016/j.ijhydene.2017.07.072 　
Intermetallic: A pseudoelement for catalysis Peer-reviewed

A.P. Tsai, S. Kameoka, K. Nozawa, M. Shimoda, Y. Ishii

Account for Chemical Research　50　2879-2885　2017
Heusler alloys: A group of novel catalysts Peer-reviewed

T. Kojima, S. Kameoka, A.P. Tsai

ACS Omega　2　147-153　2017
Twinning in fcc lattice creates low-coordinated catalytically active sites in porous gold Peer-reviewed

Marian Krajci, Satoshi Kameoka, An-Pang Tsai

The Journal of Chemical Physics　145　(8)　084703-1-084703-6　2016/08

DOI： 10.1063/1.4961508 　
One-Step Synthesis of a High Performance Pt-Fe3O4 Catalyst: Intermetallic Al13Fe4 as a Platform and Precursor Peer-reviewed

Satoshi Kameoka, Satoru Wakabayashi, Eiji Abe, An Pang Tsai

CATALYSIS LETTERS　146　(7)　1309-1316　2016/07

DOI： 10.1007/s10562-016-1757-y 　

ISSN： 1011-372X

eISSN： 1572-879X
Insights into the dominant factors of porous gold for CO oxidation Peer-reviewed

Satoshi Kameoka, Toyokazu Tanabe, Kanji Miyamoto, An Pang Tsai

JOURNAL OF CHEMICAL PHYSICS　144　(3)　034703　2016/01

DOI： 10.1063/1.4940307 　

ISSN： 0021-9606

eISSN： 1089-7690
A Composite Catalyst with a Lamellar Fe3O4/Pt/Fe3O4 Structure and Complementary Dual Catalytic Functions Peer-reviewed

Satoshi Kameoka, Satoru Wakabayashi, Kazuki Ohshima, An Pang Tsai

CATALYSIS LETTERS　145　(7)　1457-1463　2015/07

DOI： 10.1007/s10562-015-1553-0 　

ISSN： 1011-372X

eISSN： 1572-879X
Catalysts prepared from copper-nickel ferrites for the steam reforming of methanol Peer-reviewed

Y.H. Huang, S.F. Wang, A.P. Tsai, S. Kameoka

Journal of Power Sources　281　138-145　2015/05
Formation of Amorphous Pt Oxides: Characterization and Their Catalysis Peer-reviewed

Satoshi Kameoka, Masahiko Shimoda, Yoshitaka Matsushita, Yoshiyuki Yamashita, Yoshio Katsuya, Masahiko Tanaka An-, Pang Tsai

MATERIALS TRANSACTIONS　56　(4)　490-494　2015

DOI： 10.2320/matertrans.MF201410 　

ISSN： 1345-9678

eISSN： 1347-5320
Impedance Spectroscopic Study Using Nanoporous Electrode on Room Temperature Ionic Liquid-propanol Mixtures Peer-reviewed

H. Abe, M. Aono, S. Kameoka, A. P. Tsai, Y. Yoshimura, S. Ozawa

Journal of the Japan Institute of Energy　93　(10)　1015-1020　2014/11
Publisher: The Japan Institute of Energy
DOI： 10.3775/jie.93.1015 　

ISSN： 0916-8753

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AC impedance spectroscopic approach is applied into room temperature ionic liquid (RTIL) based mixtures. The RTIL is hydrophobic 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, [C₂mim][TFSI]. For higher efficient electric double layer capacitor (EDLC) as an energy storage device, Cu3Au nanoporous electrode is assembled in the [C₂mim][TFSI]-propanol mixtures. Due to high cost and high viscosity of the pure [C₂mim][TFSI], an additive is required in order to achieve the low cost and quick electrochemical response for rapid charge/discharge. Propanol having relative low vapor pressure among alcohols is adequate to reduce viscosity of the hydrophobic RTILs. With nanoporous metallic electrode, the EDL capacitance in the mixtures exceed that in the pure [C₂mim][TFSI]. Also, the capacitance in the mixtures was large enough up to 80 mol% propanol. In addition, isomer effect of propanol was seen in the AC impedance spectra.
Improving steam-reforming performance by nanopowdering CuCrO2 Peer-reviewed

Te-Wei Chiu, Ruei-Teng Hong, Bing-Sheng Yu, Yung-Han Huang, Satoshi Kameoka, An-Pang Tsai

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY　39　(26)　14222-14226　2014/09

DOI： 10.1016/j.ijhydene.2014.02.104 　

ISSN： 0360-3199

eISSN： 1879-3487
Reduction behaviors and catalytic properties for methjanol steam reforming of Cu-based spinel compounds CuX2O4 (X=Fe, Mn, Al, La) Peer-reviewed

Yung-Han Huang, Sea-Fue Wang, An-Pang Tsai, Satoshi Kameoka

Ceramics International　40　4541-4551　2014/03
Activation of Al-Cu-Fe quasicrystalline surface: fabrication of a fine nanocomposite layer with high catalytic performance Peer-reviewed

Satoshi Kameoka, Toyokazu Tanabe, Futami Satoh, Masami Terauchi, An Pang Tsai

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　15　(1)　014801　2014/02

DOI： 10.1088/1468-6996/15/1/014801 　

ISSN： 1468-6996

eISSN： 1878-5514
Effect of electronic structures on catalytic properties of CuNi alloy and Pd in MeOH-related reactions Peer-reviewed

A.P. Tsai, T. Kimura, Y. Suzuki, S. Kameoka, M. Shimoda, Y. Ishii

J. Chemical Physics　138　(14)　144701　2013/04

DOI： 10.1063/1.4798932 　

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7612
Environmental structural analysis of Raney Ru(Ni) fine particles. Peer-reviewed

R.Murao, K.Sugiyama, S.Kameoka, A.P.Tsai

Key Engineer. Mater.　508　304-309　2012

DOI： 10.4028/www.scientific.net/KEM.508.304 　

ISSN： 1013-9826
High Catalytic Activity of Hydrogenation of Ethylene over an Amorphous CeNi_2H_x Peer-reviewed

ENDO Naruki, KAMEOKA Satoshi, TSAI An Pang, HIRATA Toshiya, NISHIMURA Chikashi

MATERIALS TRANSACTIONS　52　(9)　1794-1798　2011/09
Publisher: The Japan Institute of Metals and Materials
DOI： 10.2320/matertrans.MAW201105 　

ISSN： 1345-9678

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Hydrogenation of ethylene (C₂H₄) over intermetallic CeNi₂ and amorphous CeNi₂H_x have been investigated. Amorphous CeNi₂H_x catalyzed hydrogenation of C₂H₄ much more effectively than intermetallic CeNi₂. For amorphous CeNi₂H_x, activity of the hydrogenation of C₂H₄ was drastically enhanced by the presence of H₂ at low temperature (<40°C) in H₂/C₂H₄ whereas no activity was detected in He/C₂H₄ even at 160°C. According to C₂H₄ temperature-programmed desorption measurements, it is concluded that amorphous CeNi₂H_x exhibits high activity due to its disordered structure where absorbed hydrogen plays an important role in the formation of active sites.
Catalytic Properties Dominated by Electronic Structures in PdZn, NiZn, and PtZn Intermetallic Compounds Peer-reviewed

Nozawa Kazuki, Endo Naruki, Kameoka Satoshi, Tsai An Pang, Ishii Yasushi

J Phys Soc Jpn　80　(6)　064801-064801-13　2011/06
Publisher: The Physical Society of Japan
DOI： 10.1143/JPSJ.80.064801 　

ISSN： 0031-9015

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The catalytic functions of Pd are completely modified by alloying with Zn, and PdZn exhibits comparable catalytic selectivity to Cu in the steam reforming of methanol (SRM). We perform theoretical and experimental studies to confirm our previous argument that the position of the d-band is a significant factor determining catalytic properties. First-principles slab calculations for M--Zn (M = \text{Pd}, Ni, Pt) reveal that the bond breaking on the surface leads to some reduction in the d-bandwidth, but that the position of the d-band for stable surfaces remains essentially unchanged from that of the bulk. The origin of the dramatic change in the electronic structure caused by alloying is theoretically demonstrated. Our previous argument is experimentally examined not only in SRM, but also in elemental reactions such as CO and H2 adsorptions. Magnetic measurements also indicate the importance of the d-band position in SRM.
Research on quasicrystal and alloy catalysts

蔡安邦, 亀岡聡, 藤田伸尚

Materials integration　24　(4)　43-48　2011/04
Publisher: ティー・アイ・シィー
ISSN： 1344-7858
CO hydrogenation over a hydrogen-induced amorphization of intermetallic compound CeNi2 Peer-reviewed

N. Endo, S. Ito, K. Tomishige, S. Kameoka, A.P. Tsai, T. Hirata, C. Nishimura

Catalysis Today　164　293-296　2011/04
Structural analysis of metal nano-particles prepared by leaching Peer-reviewed

Reiko Murao, Kazumasa Sugiyama, Satoshi Kameoka, An-Pang Tsai

ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES　67　C423-C423　2011

DOI： 10.1107/S0108767311089379 　

ISSN： 2053-2733
Evolution of microstructure induced by calcination in leached Al-Cu-Fe quasicrystal and its effects on catalytic activity Peer-reviewed

T. Tanabe, S. Kameoka, A. P. Tsai

Journal of Materials Science　46　(7)　2242-2250　2011/01
Atomic pair distribution function (PDF) analysis of Raney Pd and Rh fine particles. Peer-reviewed

R.Murao, K.Sugiyama, Y.Kashiwagi, S.Kameoka, A.P.Tsai

Philos. Mag.　91　(19-21)　2954-2961　2011

DOI： 10.1080/14786435.2010.541167 　

ISSN： 1478-6435
Preparation of Nano-Composited Catalyst from the Bulk Intermetallic Compound AuZr3 with Hydrogen Absorption Peer-reviewed

Naruki Endo, Satoshi Kameoka, An Pang Tsai, Toshiya Hirata, Chikashi Nishimura

CATALYSIS LETTERS　139　(1-2)　67-71　2010/10

DOI： 10.1007/s10562-010-0397-x 　

ISSN： 1011-372X
Microstructure of leached Al-Cu-Fe quasicrystal with high catalytic performance for steam reforming of methanol Peer-reviewed

Toyokazu Tanabe, Satoshi Kameoka, An Pang Tsai

APPLIED CATALYSIS A-GENERAL　384　(1-2)　241-251　2010/08

DOI： 10.1016/j.apcata.2010.06.045 　

ISSN： 0926-860X

eISSN： 1873-3875
Self-assembled porous nano-composite with high catalytic performance by reduction of tetragonal spinel CuFe2O4 Peer-reviewed

Satoshi Kameoka, Toyokazu Tanabe, An Pang Tsai

APPLIED CATALYSIS A-GENERAL　375　(1)　163-171　2010/02

DOI： 10.1016/j.apcata.2009.12.035 　

ISSN： 0926-860X

eISSN： 1873-3875
Hydrogen absorption in the intermetallic compounds Zr2TM (TM=Cu, Ag and Au) with MoSi2-type structure (C11b) Peer-reviewed

N. Endo, S. Kameoka, A.P. Tsai, Z. Lingling, T. Hirata, C. Nishimura

Journal of Alloys and Compounds　490　L24-L27　2010
Alternately layered Au/Fe3O4 with porous structure-a self-assembled nanoarchitecture for catalysis materials Peer-reviewed

Satoshi Kameoka, An-Pang Tsai

JOURNAL OF MATERIALS CHEMISTRY　20　(35)　7348-7351　2010

DOI： 10.1039/c0jm01708f 　

ISSN： 0959-9428
Hydrogen absorption properties of intermetallic compounds in the Au-Zr binary system Peer-reviewed

N. Endo, S. Kameoka, A.P. Tsai, Z. Lingling, T. Hirata, C. Nishimura

Journal of Alloys and Compounds　485　588-592　2009/10

DOI： 10.1016/j.jallcom.2009.06.032 　

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5702
A Novel Process for Preparation of Unsupported Mesoporous Intermetallic NiZn and PdZn Catalysts Peer-reviewed

Satoshi Kameoka, Tomofumi Kimura, An Pang Tsai

CATALYSIS LETTERS　131　(1-2)　219-224　2009/08

DOI： 10.1007/s10562-009-0045-5 　

ISSN： 1011-372X
Catalytic performance and microstructure of Al-Cu-Fe quasicrystalline catalyst

T. Tanabe, S.Kameoka, F.Sato, M.Terauchi, An Pang Tsai

Abstract of the 5th Asian International Workshop on Quasicrytals　8　2009/06/01
Oxidation behavior and catalytic property of intermetallic compound AuCu Peer-reviewed

Satoshi Kameoka, An Pang Tsai

CATALYSIS TODAY　132　(1-4)　88-92　2008/03

DOI： 10.1016/j.cattod.2007.12.092 　

ISSN： 0920-5861
CO oxidation over a fine porous gold catalyst fabricated by selective leaching from an ordered AuCu3 intermetallic compound Peer-reviewed

Satoshi Kameoka, An Pang Tsai

CATALYSIS LETTERS　121　(3-4)　337-341　2008/03

DOI： 10.1007/s10562-007-9344-x 　

ISSN： 1011-372X

eISSN： 1572-879X
Preparation of a novel copper catalyst in terms of the immiscible interaction between copper and chromium Peer-reviewed

S. Kameoka, M. Okada, A.P. Tsai

Catalysis Letters　120　252-256　2008

DOI： 10.1007/s10562-007-9277-4 　

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4505
Cross-section TEM investigation of quasicrystalline catalysts prepared by aqueous NaOH leaching

T. Tanabe, S. Kameoka, F. Sato, M. Terauchi, A. Pang Tsai

Philosophical Magazine　87　(18-21)　3103-3108　2007/07

DOI： 10.1080/14786430701365017 　

ISSN： 1478-6435 1478-6443
Cross-section TEM investigation of quasicrystalline catalysts prepared by NaOH aq. leaching Peer-reviewed

T. Tanabe, S. Kameoka, F. Sato, M. Terauchi, A.P. Tsai

Philosophical Magazine　87　3103-3108　2007
Electoronic structure of leached Al-Cu-Fe quasicrystals used as catalysts Peer-reviewed

Belin-Ferre, M, F. Fontaine, J. Thirion, S. Kameoka, A. P. Tsai, J. M. Dubois

Philosophical Magazine　86　687-692　2006/02

DOI： 10.1080/14786430500318902 　
A novel catalyst fabricated from Al-Cu-Fe quasicrystal for steam reforming of methanol Peer-reviewed

T. Tanabe, S. Kameoka, A.P. Tsai

Catalysis Today　111　153-157　2006/01
Catalytic properties of Alkali-leached Ni3Al for hydrogen production from methanol Peer-reviewed

Y. Xu, S. Kameoka, K. Kishida, M. Demura, A.P. Tsai, T. Hirano

Intermetallics　13　151-155　2005/04

DOI： 10.1016/j.intermet.2004.07.039 　
Spinel CuFe2O4: a precursor for copper catalyst with high thermal stability and activity Peer-reviewed

S Kameoka, T Tanabe, AP Tsai

CATALYSIS LETTERS　100　(1-2)　89-93　2005/03

DOI： 10.1007/s10562-004-3091-z 　

ISSN： 1011-372X

eISSN： 1572-879X
Catalytic properties of Ni3Al for hydrogen production reactions

Ya Xu, Satoshi Kameoka, Kyosuke Kishida, Masahiko Demura, An-Pong Tsai, Toshiyuki Hirano

Materials Science Forum　475-479　(I)　755-758　2005
Publisher: Trans Tech Publications Ltd
DOI： 10.4028/0-87849-960-1.755 　

ISSN： 1662-9752 0255-5476
Catalytic properties of Ni3Al intermetallics for hydrogen production reactions Peer-reviewed

Y. Xu, S. Kameoka, K. Kishida, M. Demura, A.P. Tsai, T. Hirano

Materials Science Forum　479　755-758　2005
PdZn=Cu: Can an intermetallic compound replace an element ? Peer-reviewed

A. P. Tsai, S. Kameoka, Y. Ishii

Journal of the Physical Society of Japan　73　(12)　3270-3273　2004/12
Publisher: The Physical Society of Japan (JPS)
DOI： 10.1143/JPSJ.73.3270 　

ISSN： 0031-9015

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An intermetallic compound, PdZn, exhibits a similar valence electron density of states as pure Cu, which has been confirmed by energy band calculation and X-ray photoelectron spectroscopy. The catalytic function was verified to be identical for PdZn and Cu. This explains the origin of the high selectivity of PdZn for the steam reforming of methanol (SRM), $\text{CH$_{3}$OH}+\text{H$_{2}$O}\rightarrow\text{3H$_{2}$}+\text{CO$_{2}$}$, a chemical reaction for which Cu is known to be one of the best catalyst; namely, PdZn is catalytically equivalent to Cu. Compared with PdZn, PtZn and NiZn, which have the same crystal structure but different valence band structures, exhibit a poorer selectivity of CO2. This suggests that the catalytic function, at least for SRM, is solely governed by the valence band structure of the catalyst. A simple but very important principle has been derived that an intermetallic compound may be logically designed by band structure calculation, aiming at replacing a selected metallic element without changing the catalytic function. Using this principle, we designed a compound, PdCd, which exhibits a similar valence electron density of state and selectivity for SRM with Cu.
Catalytic properties of Ni₃Al intermetallics for methanol decomposition Peer-reviewed

Y. Xu, S. Kameoka, K. Kishida, M. Demura, A.-P. Tsai, T. Hirano

Materials Transactions　45　(11)　3177-3179　2004/11
Publisher: The Japan Institute of Metals and Materials
DOI： 10.2320/matertrans.45.3177 　

ISSN： 1345-9678 1347-5320

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Ni₃Al is known as promising high-temperature structural materials because of its excellent high temperature strength and corrosion/oxidation resistance. Recently, we found that Ni₃Al shows high activity for methanol decomposition (CH₃OH → 2H₂ + CO), and little effect for steam reforming of methanol (CH₃OH + H₂O → 3H₂ + CO₂) in the case of feeding methanol and water. In the present study, we examined the catalytic activity of Ni₃Al powders by feeding pure methanol at a reaction temperature range from 523 to 633 K. It was found that Ni₃Al shows not only a high activity for the methanol decomposition but also suppresses the methanation. The catalytic properties of Ni₃Al were compared to that in the case of feeding both methanol and water.
Selective CO oxidation in H-2-rich gas over K2CO3-promoted Rh/SiO2 catalysts: effects of preparation method Peer-reviewed

S Ito, H Tanaka, Y Minemura, S Kameoka, K Tomishige, K Kunimori

APPLIED CATALYSIS A-GENERAL　273　(1-2)　295-302　2004/10

DOI： 10.1016/j.apcata.2004.06.047 　

ISSN： 0926-860X
Role of nascent oxygen transients in N2O decomposition and selective catalytic reduction of N2O Peer-reviewed

T Nobukawa, M Yoshida, S Kameoka, SI Ito, K Tomishige, K Kunimori

CATALYSIS TODAY　93-5　791-796　2004/09

DOI： 10.1016/j.cattod.2004.06.072 　

ISSN： 0920-5861
Al-Cu-Fe quasicrystals for steam reforming of methanol: a new form of copper catalysts Peer-reviewed

S Kameoka, T Tanabe, AP Tsai

CATALYSIS TODAY　93-5　23-26　2004/09

DOI： 10.1016/j.cattod.2004.05.010 　

ISSN： 0920-5861
Selective Catalytic Reduction of N_2O with CH_4 over Fe-BEA Catalysts : Reaction Intermediate and Reaction Mechanism

NOBUKAWA Takeshi, YOSHIDA Masanori, OKUMURA Kazu, KAMEOKA Satoshi, ITO Shin-ichi, TOMISHIGE Keiichi, KUNIMORI Kimio

J. Surf. Sci. Soc. Jpn.　25　(8)　505-512　2004/08/10
Publisher: The Surface Science Society of Japan
DOI： 10.1380/jsssj.25.505 　

ISSN： 0388-5321

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The selective catalytic reduction (SCR) of N₂O with CH₄ in the presence of excess O₂ was studied over ion-exchanged Fe-BEA catalyst by the observation of reaction intermediates in order to elucidate the reaction mechanism. From the results of activity tests, SCR of N₂O with CH₄ in the presence of excess O₂ proceeded at much lower reaction temperature than N₂O decomposition over the Fe-BEA catalyst. The profiles of temperature programmed desorption of O₂ after N₂O pretreatment gave a new desorption peak at lower desorption temperatures compared to the case of O₂ pretreatment. However, the oxygen species desorbed at the lower temperatures did not react with CH₄ in the profiles of temperature programmed reaction. From the structural analysis by means of extended X-ray absorption fine structure, a Fe-Fe bond was observed on the Fe-BEA catalyst after N₂O treatment. This suggests that binuclear species can be formed over the Fe-BEA catalyst. In the in-situ FTIR observation, the methoxy and formate species were observed during the SCR reaction. We measured the reaction rates of these surface species with N₂O and O₂, and this is related to the selective reduction of N₂O with CH₄.
Comparative study between Zn-Pd/C and Pd/ZnO catalysts for steam reforming of methanol Peer-reviewed

Y Suwa, SI Ito, S Kameoka, K Tomishige, K Kunimori

APPLIED CATALYSIS A-GENERAL　267　(1-2)　9-16　2004/07

DOI： 10.1016/j.apcata.2004.02.016 　

ISSN： 0926-860X
Preparation of a novel copper catalyst from Al-Cu-Fe quasicrystalline Peer-reviewed

S. Kameoka, T. Tanabe, M. Terauchi, A.P. Tsai

Abstract of 13th International Congress on Catalysis　1-276　2004/07
In-situ observation of reaction intermediate in the selective catalytic reduction of N2O with CH4 over Fe ion-exchanged BEA zeolite catalyst for the elucidation of its reaction mechanism using FTIR Peer-reviewed

T Nobukawa, M Yoshida, S Kameoka, S Ito, K Tomishige, K Kunimori

JOURNAL OF PHYSICAL CHEMISTRY B　108　(13)　4071-4079　2004/04

ISSN： 1520-6106
Selective catalytic reduction of N2O with CH4 and N2O decomposition over Fe-zeolite catalysts Peer-reviewed

T Nobukawa, M Yoshida, S Kameoka, S Ito, K Tomishige, K Kunimori

RECENT ADVANCES IN THE SCIENCE AND TECHNOLOGY OF ZEOLITES AND RELATED MATERIALS, PTS A - C　154　2514-2521　2004

ISSN： 0167-2991
Steam reforming of methanol over Pt-Zn alloy catalyst supported on carbon black Peer-reviewed

S Ito, Y Suwa, S Kondo, S Kameoka, K Tomishige, K Kunimori

CATALYSIS COMMUNICATIONS　4　(10)　499-503　2003/10

DOI： 10.1016/S1566-7367(03)00132-8 　

ISSN： 1566-7367
Catalytic performance of K-promoted Rh/USY catalysts in preferential oxidation of CO in rich hydrogen Peer-reviewed

H Tanaka, S Ito, S Kameoka, K Tomishige, K Kunimori

APPLIED CATALYSIS A-GENERAL　250　(2)　255-263　2003/09

DOI： 10.1016/S0926-860X(03)00320-X 　

ISSN： 0926-860X
Promoting effect of potassium in selective oxidation of CO in hydrogen-rich stream on Rh catalysts Peer-reviewed

H Tanaka, SI Ito, S Kameoka, K Tomishige, K Kunimori

CATALYSIS COMMUNICATIONS　4　(1)　1-4　2003/01

ISSN： 1566-7367
Reaction between N2O and CH4 over Fe ion-exchanged BEA zeolite catalyst: A possible role of nascent oxygen transients from N2O Peer-reviewed

S Kameoka, T Nobukawa, S Tanaka, S Ito, K Tomishige, K Kunimori

PHYSICAL CHEMISTRY CHEMICAL PHYSICS　5　(15)　3328-3333　2003

DOI： 10.1039/b300562n 　

ISSN： 1463-9076
Isotopic study of N2O decomposition on an ion-exchanged Fe-zeolite catalyst: Mechanism of O2 formation

Takeshi Nobukawa, Shin-Ichi Tanaka, Shin-Ichi Ito, Keiichi Tomishige, Satoshi Kameoka, Kimio Kunimori

Catalysis Letters　83　(1-2)　5-8　2002/10

DOI： 10.1023/A:1020636910973 　

ISSN： 1011-372X
CO hydrogenation over RhVO4/SiO2, Rh/V2O3 and Rh/SiO2 catalysts: reduction and regeneration of RhVO4 Peer-reviewed

S Ito, C Chibana, K Nagashima, S Kameoka, K Tomishige, K Kunimori

APPLIED CATALYSIS A-GENERAL　236　(1-2)　113-120　2002/09

ISSN： 0926-860X

eISSN： 1873-3875
Hydrogenation of co over RhVO4/SiO2 catalyst - Detection and elimination of deposited carbon and regeneration of RhVO4

Shin-ichi Ito, Chikashi Chibana, Ken Nagashima, Satoshi Kameoka, Keiichi Tomishige, Kimio Kunimori

Sekiyu Gakkaishi (Journal of the Japan Petroleum Institute)　45　(4)　251-255　2002/07

ISSN： 0582-4664
Hydrogenation of CO over RhVO4/SiO2 catalyst - Detection and elimination of deposited carbon and regeneration of RhVO4- Peer-reviewed

S Ito, C Chibana, K Nagashima, S Kameoka, K Tomishige, K Kunimori

JOURNAL OF THE JAPAN PETROLEUM INSTITUTE　45　(4)　251-255　2002/07

ISSN： 1346-8804
Selective catalytic reduction of N2O with light alkanes and N2O decomposition over Fe-BEA zeolite catalysts Peer-reviewed

T Nobukawe, K Kita, S Tanaka, S Ito, T Miyadera, S Kameoka, K Tomishige, K Kunimori

IMPACT OF ZEOLITES AND OTHER POROUS MATERIALS ON THE NEW TECHNOLOGIES AT THE BEGINNING OF THE NEW MILLENNIUM, PTS A AND B　142　557-564　2002

ISSN： 0167-2991
Enhancement of C2H6 oxidation by O-2 in the presence of N2O over Fe ion-exchanged BEA zeolite catalyst Peer-reviewed

S Kameoka, K Kita, S Tanaka, T Nobukawa, S Ito, K Tomishige, T Miyadera, K Kunimori

CATALYSIS LETTERS　79　(1-4)　63-67　2002

DOI： 10.1023/A:1015387704297 　

ISSN： 1011-372X
Catalytic Decomposition of N_2O on Supported Rh Catalysts - The Oxygen Coverage Dependence on the Activity and the Mechanism of O_2 Desorption -

TANAKA Shin-ichi, KAMEOKA Satoshi, ITO Shin-ichi, TOMISHIGE Keiichi, KUNIMORI Kimio

J. Surf. Sci. Soc. Jpn.　22　(9)　594-600　2001/09/10
Publisher: The Surface Science Society of Japan
DOI： 10.1380/jsssj.22.594 　

ISSN： 0388-5321

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N₂O decomposition on supported Rh catalysts (Rh/USY, Rh/SiO₂, Rh/Al₂O₃) has been carried out to study the oxygen coverage (θ_o) dependence on the activity and to study the mechanism of O₂ desorption using an isotopic tracer technique. The decomposition activity for all the Rh catalysts went down to the minimum (formation of only N₂), but increased with increasing the coverage, and finally a high activity with steady-state O₂ production was attained at high θ_o. In the isotope study, N₂¹⁶O was pulsed onto ¹⁸O/oxidized Rh catalyst at a low temperature (220^oC), and desorbed O₂ molecules were monitored by means of mass spectrometry. The ¹⁸O fraction in the desorbed oxygen had almost the same value as that on the surface oxygen. The result shows that the O₂ desorption does not proceed via the Eley-Rideal mechanism, but via the Langmuir-Hinshelwood mechanism, i.e., the desorption of dioxygen through the recombination of adsorbed oxygen. On the other hand, O₂-TPD measurement in He showed that desorption of oxygen from the Rh catalyst occurred at much higher temperatures (> 500^oC). Therefore, it was proposed that reaction-assisted desorption of O₂ takes place during N₂O decomposition at the low temperature (220^oC).
Mechanism of O-2 desorption during N2O decomposition on an oxidized Rh/USY catalyst Peer-reviewed

S Tanaka, K Yuzaki, S Ito, S Kameoka, K Kunimori

JOURNAL OF CATALYSIS　200　(2)　203-208　2001/06

DOI： 10.1006/jcat.2001.3197 　

ISSN： 0021-9517
Selective catalytic reduction of N2O with C3H6 over Fe-ZSM5 catalyst in the presence of excess O-2: The correlation between the induction period and the surface species produced Peer-reviewed

S Kameoka, K Yuzaki, T Takeda, S Tanaka, S Ito, T Miyadera, K Kunimori

PHYSICAL CHEMISTRY CHEMICAL PHYSICS　3　(2)　256-260　2001

DOI： 10.1039/b007365m 　

ISSN： 1463-9076
Selective catalytic reduction of N2O with light alkanes over different Fe-zeolite catalysts Peer-reviewed

S. Kameoka, S. Tanaka, K. Kita, T. Nobukawa, S. Ito, T. Miyadera, K. Kunimori

Studies in Surface Science and Catalysis　135　321　2001
Publisher: Elsevier Inc.
DOI： 10.1016/S0167-2991(01)81732-8 　

ISSN： 0167-2991
Mechanism of N2O decomposition over a Rh black catalyst studied by a tracer method - The reaction of N2O with O-18(a) Peer-reviewed

S Tanaka, K Yuzaki, S Ito, H Uetsuka, S Kameoka, K Kunimori

CATALYSIS TODAY　63　(2-4)　413-418　2000/12

ISSN： 0920-5861
Oxidation of CH4 and CO2 reforming of CH4 over Rh/ZrO2 catalysts with different metal dispersions Peer-reviewed

S Ito, K Nagashima, R Araki, T Yarimizu, S Kameoka, K Kunimori

NIPPON KAGAKU KAISHI　(8)　561-566　2000/08

ISSN： 0369-4577
Catalytic dechlorination of aromatic chlorides with noble-metal catalysts under mild conditions: approach to practical use Peer-reviewed

Y Ukisu, S Kameoka, T Miyadera

APPLIED CATALYSIS B-ENVIRONMENTAL　27　(2)　97-104　2000/07

ISSN： 0926-3373
Selective catalytic reduction of NOx with CH3OH, C2H5OH and C3H6 in the presence of O-2 over Ag/Al2O3 catalyst: Role of surface nitrate species Peer-reviewed

S Kameoka, Y Ukisu, T Miyadera

PHYSICAL CHEMISTRY CHEMICAL PHYSICS　2　(3)　367-372　2000/02

DOI： 10.1039/a907515a 　

ISSN： 1463-9076
Isotopic study of nitrous oxide decomposition on an oxidized Rh catalyst: mechanism of oxygen desorption Peer-reviewed

H Uetsuka, K Aoyagi, S Tanaka, K Yuzaki, S Ito, S Kameoka, K Kunimori

CATALYSIS LETTERS　66　(1-2)　87-90　2000

ISSN： 1011-372X
Selective catalytic reduction of N2O with methane in the presence of excess oxygen over Fe-BEA zeolite Peer-reviewed

S Kameoka, T Suzuki, K Yuzaki, T Takeda, S Tanaka, S Ito, T Miyadera, K Kunimori

CHEMICAL COMMUNICATIONS　(9)　745-746　2000

DOI： 10.1039/b001321h 　

ISSN： 1359-7345
Simultaneous removal of N2O and CH4 as the strong greenhouse-effect gases over Fe-BEA zeolite in the presence of excess O-2 Peer-reviewed

S Kameoka, K Kita, T Takeda, S Tanaka, S Ito, K Yuzaki, T Miyadera, K Kunimori

CATALYSIS LETTERS　69　(3-4)　169-173　2000

DOI： 10.1023/A:1019054930595 　

ISSN： 1011-372X
In situ diffuse reflectance infrared Fourier transform spectroscopy study of surface species involved in NOx reduction by ethanol over alumina-supported silver catalyst Peer-reviewed

T Chafik, S Kameoka, Y Ukisu, T Miyadera

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL　136　(2)　203-211　1998/12

ISSN： 1381-1169

eISSN： 1873-314X
Rh-based catalysts for catalytic dechlorination of aromatic chloride at ambient temperature Peer-reviewed

Y Ukisu, S Kameoka, T Miyadera

APPLIED CATALYSIS B-ENVIRONMENTAL　18　(3-4)　273-279　1998/10

ISSN： 0926-3373
Role of organic nitro compounds in selective reduction of NOx with ethanol over different supported silver catalysts Peer-reviewed

S Kameoka, T Chafik, Y Ukisu, T Miyadera

CATALYSIS LETTERS　51　(1-2)　11-14　1998

DOI： 10.1023/A:1019041118880 　

ISSN： 1011-372X
Reactivity of surface isocyanate species with NO, O-2 and NO+O-2 in selective reduction of NOx over Ag/Al2O3 and Al2O3 catalysts Peer-reviewed

S Kameoka, T Chafik, Y Ukisu, T Miyadera

CATALYSIS LETTERS　55　(3-4)　211-215　1998

DOI： 10.1023/A:1019043214646 　

ISSN： 1011-372X

eISSN： 1572-879X
Formation of novel Al2O3 surface (Al-O-star) by plasma-excited nitrogen and its catalytic application - production of ammonia and oxygen from nitrogen and water Peer-reviewed

S Kameoka, M Kuroda, K Aoyagi, S Ito, K Kunimori

APPLIED SURFACE SCIENCE　121　351-354　1997/11

DOI： 10.1016/S0169-4332(97)00329-2 　

ISSN： 0169-4332
Formation of a novel Al2O3 surface (Al-O*) by plasma-excited nitrogen: O-2 production by water treatment of the Al-O* surface Peer-reviewed

S Kameoka, M Kuroda, S Ito, K Kunimori

CHEMICAL COMMUNICATIONS　(18)　2215-2216　1996/09

DOI： 10.1039/cc9960002215 　

ISSN： 1359-7345
Chemical interaction between plasma-excited nitrogen and the surface of HY zeolite Peer-reviewed

S Kameoka, M Kuroda, H Uetsuka, S Ito, K Kunimori

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS　92　(9)　1643-1646　1996/05

DOI： 10.1039/ft9969201643 　

ISSN： 0956-5000
THE CHEMICAL INTERACTION BETWEEN PLASMA-EXCITED NITROGEN AND THE SURFACE OF TITANIUM-DIOXIDE Peer-reviewed

S KAMEOKA, T KURIYAMA, M KURODA, S ITO, K KUNIMORI

APPLIED SURFACE SCIENCE　89　(4)　411-415　1995/08

DOI： 10.1016/0169-4332(95)00052-6 　

ISSN： 0169-4332
PLASMA-INDUCED CHEMISORPTION OF NITROGEN AND ITS CHEMICAL-REACTIVITY ON ALUMINA Peer-reviewed

K KUNIMORI, T KURIYAMA, S ITO, S KAMEOKA

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS　33　(7B)　4195-4197　1994/07

ISSN： 0021-4922
Plasma-Induced Chemisorption of Nitrogen and Its Chemical Reactivity on Al2O3 and Pt/Al2O3 Surfaces. Peer-reviewed

KAMEOKA Satoshi, KURIYAMA Takashi, ITO Shin-ichi, KUNIMORI Kimio

J. Surf. Sci. Soc. Jpn.　14　(10)　623-629　1993
Publisher: The Surface Science Society of Japan
DOI： 10.1380/jsssj.14.623 　

ISSN： 0388-5321

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Nitrogen, one of the most chemically inactive molecules, does not adsorb on A1₂O₃ and Pt/Al₂O₃ catalysts at room temperature. However, once it was excited by plasma discharge using radio-frequency (13.56 MHZ), activated adsorption of nitrogen occurred on Pt/Al₂O₃ and Al₂O₃ at room temperature. The characterization of chemisorbed N₂ and its chemical reactivity with hydrogen have been studied by temperature programmed desorption (TPD) and infrared spectroscopy (IR). The adsorbed nitrogen on Pt/Al₂O₃ or Al₂O₃ was desorbed below 300°C by TPD, and IR spectra of the adsorbed nitrogen on Pt/Al₂O₃ were observed at ca . 2260 and 2230 cm^-1, which were assigned to N-N stretching vibration. Since almost the same absorption bands were observed with N₂ on Al₂O₃, it was considered that N₂(a) was chemisorbed mainly on the Al₂O₃ support . The H₂ exposure experiment at room temperature showed that the infrared bands of N₂(a) on the Al₂O₃ support (without Pt) did not change, but the intensity of the spectrum of N₂ on the Pt/Al₂O₃ catalyst decreased significantly with time. Moreover, NH₃ was detected in the liquid N₂ trap by GC after the TPD run. It was proposed that the N₂(a) reacted with the hydrogen spilt-over from the Pt surface to form other species like NH_x(a) (X=1∼3) even at room temperature.
PLASMA-INDUCED CHEMISORPTION OF NITROGEN AND HYDROGEN ON ALUMINA-SUPPORTED PLATINUM CATALYSTS Peer-reviewed

S KAMEOKA, S ITO, K KUNIMORI

STUDIES IN SURFACE SCIENCE AND CATALYSIS　77　257-260　1993

ISSN： 0167-2991
PLASMA-INDUCED CHEMISORPTION OF NITROGEN AND HYDROGEN ON ALUMINA-SUPPORTED PLATINUM CATALYSTS Peer-reviewed

S KAMEOKA, S ITO, K KUNIMORI

NEW ASPECTS OF SPILLOVER EFFECT IN CATALYSIS　77　257-260　1993

ISSN： 0167-2991
PLASMA-INDUCED NITROGEN CHEMISORPTION ON A RUTHENIUM BLACK CATALYST - FORMATION OF NH3 BY HYDROGENATION OF THE CHEMISORBED NITROGEN Peer-reviewed

K KUNIMORI, M OSUMI, S KAMEOKA, S ITO

CATALYSIS LETTERS　16　(4)　443-446　1992

ISSN： 1011-372X

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Misc. 33

Creation of novel catalysts using hydrogen storage alloys Invited

Ryota Tsukuda, Satoshi Kameoka

66　(2)　73-79　2024/04
Metallurgical Design for Novel Metallic Catalysts Invited

65　(6)　368-368　2023/12
PREFACE: Special Issue on Metallurgy for Advanced Catalytic Materials Peer-reviewed

Satoshi Kameoka, Ya Xu

MATERIALS TRANSACTIONS　64　(10)　2368-2368　2023/10/01
Publisher: Japan Institute of Metals
DOI： 10.2320/matertrans.mpr2023908 　

ISSN： 1345-9678

eISSN： 1347-5320
会員の声縁：金属学と触媒材料のメタラジ― Invited

亀岡聡

触媒　64　(3)　190-190　2022
Heritage from Professor An Pang Tsai to the research field of metallic catalysis materials Invited

S. Kameoka

Acta Crystallographica, Section A　A77　C660-C660　2021/12
Screening of ternary intermetallic catalysts is possible using metallurgical synthesis: Demonstration on Heusler alloys Invited Peer-reviewed

T. Kojima, S. Kameoka, A.P. Tsai

Kona Powder and Particle Journal　38　110-121　2021
Publisher: Hosokawa Powder Technology Foundation
DOI： 10.14356/kona.2021008 　

ISSN： 0288-4534

eISSN： 2187-5537
The emergence of Heuslar alloy catalysts Peer-reviewed

T. Kojima, S. Kameoka, A.P. Tsai

Science and Technology of Advanced Materials　20　445-455　2019/12
ホイスラー合金を用いた触媒機能チューニング－アルキン選択水素化の例―

小嶋隆幸, 亀岡聡, 藤井伸平, 上田茂典, 蔡安邦

触媒　61B　5-7　2019/03
金の触媒作用における新しいメカニズムの提案ーナノ双晶の役割ー Peer-reviewed

蔡安邦, 亀岡聡, M. Krajci

触媒　59　(B)　78-80　2017/03
Special Issue on Advanced Metallic Materials for Catalysis PREFACE

S. Kameoka, Y. Xu, C. Nishimura, A. P. Tsai

MATERIALS TRANSACTIONS　56　(4)　459-459　2015

ISSN： 1345-9678

eISSN： 1347-5320
High performance catalysts prepared from Al-Cu-Fe icosahedral quasicrystal

A.P. Tsai, T. Tanabe, S. Kameoka

Recent Patents on Materials Science　8　155-165　2015
Electronic structure study of intermetallic compounds consisting of 10-12 group elements by TEM-EELS

Sato Y., Terauchi M., Kameoka S., Tsai A.P.

Meeting abstracts of the Physical Society of Japan　68　(2)　716-716　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
29pEP-5 TEM-EELS study of X-XII intermetalic compounds

Sato Y., Terauchi M., Kameoka S., Tsai A. P.

Meeting abstracts of the Physical Society of Japan　68　(1)　896-896　2013/03/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
希少金属代替のための合金触媒設計

亀岡聡, 蔡安邦

ペトロテック　36　(1)　6-11　2013
Publisher: 石油学会 ; 1978-
ISSN： 0386-2763
20pCA-5 TEM-EELS study of intermetallic compounds having Cu catalytic properties

Sato Y., Terauchi M., Kameoka S., Tsai A. P.

Meeting abstracts of the Physical Society of Japan　67　(2)　744-744　2012/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aGF-11 TEM-EELS study of electronic structure of PdZn

Sato Y., Terauchi M., Kameoka S., Tsai A. P.

Meeting abstracts of the Physical Society of Japan　67　(1)　859-859　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Preparation of Catalytic Materials Based on Metallurgy

Kameoka Satoshi

Bulletin of the Japan Institute of Metals　50　(11)　473-479　2011
Publisher: The Japan Institute of Metals and Materials
DOI： 10.2320/materia.50.473 　

ISSN： 1340-2625
水素誘起アモルファス化CeNi2金属間化合物の触媒特性 Peer-reviewed

遠藤成輝, 伊藤伸一, 冨重圭一, 亀岡聡, 蔡安邦, 平田俊也, 西村睦

触媒　52　(6)　369-371　2010/09
19aXC-2 Charge Density Analysis of CuM_2O_4(M=Fe,Cr) using Convergent-Beam Electron Diffraction

Kimura D., Ogata Y., Tsuda K., Kameoka S., Tsai A. P.

Meeting abstracts of the Physical Society of Japan　62　(1)　951-951　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Ni3Al intermetallics catalyst for hydrogen production from methanol

Ya Xu, Satoshi Kameoka, Masahiko Demura, An Pang Tsai, Toshiyuki Hirano

AIChE Annual Meeting, Conference Proceedings　2006/12/01
AlCuFe準結晶触媒の表面及び断面TEM観察 Peer-reviewed

田邉豊和, 亀岡聡, 佐藤二美, 寺内正己, 蔡安邦

触媒　48　(6)　383-385　2006/09
24aYK-9 Charge Density Analysis of CuFe_2O_4 using Convergent-Beam Electron Diffraction

Kimura D., Tsuda K., Kameoka S., Tsai A.P.

Meeting abstracts of the Physical Society of Japan　61　(2)　788-788　2006/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Surface Structure of Quasicrystal Alloy Invited

KAMEOKA SATOSHI

48　(5)　360-360　2006/08/10

ISSN： 0559-8958
金属間の非固溶効果を利用した新規銅触媒の調製 Peer-reviewed

亀岡聡, 岡田美香, 蔡安邦

触媒　48　(2)　74-76　2006/03
Publisher: 触媒学会
ISSN： 0559-8958
価電子構造制御による合金触媒設計 Peer-reviewed

蔡安邦, 亀岡聡, 石井靖

触媒　47　(9)　488-490　2005/09
Characterization and catalytic properties of Ni<inf>3</inf>Al for hydrogen production from methanol

Ya Xu, Satoshi Kameoka, Kyosuke Kishida, Masahiko Demura, An Pang Tsai, Toshiyuki Hirano

Materials Research Society Symposium Proceedings　842　431-436　2005/08/25

ISSN： 0272-9172
Preparation of novel catalyst from quasicrystalline alloys Peer-reviewed

亀岡聡, 田邉豊和, 佐藤二美, 寺内正己, 蔡安邦

触媒　46　441-443　2004/09
The Selective Catalytic Reduction of N_2O with CH_4 over Fe-BEA catalyst : Its Reaction Mechanism using FTIR

NOBUKAWA Takeshi, YOSHIDA Masanori, KAMEOKA Satoshi, ITO Shin-ichi, TOMISHIGE Keiichi, KUNIMORI Kimio

45　(6)　419-421　2003/09/10
Publisher: 触媒学会
ISSN： 0559-8958
準結晶触媒を用いたメタノールの水蒸気改質反応 Peer-reviewed

亀岡聡, 蔡安邦

触媒　45　138-140　2003/03
担持Rh触媒によるN_2O分解反応 - 酸素の脱離メカニズム -

田中伸一, 亀岡聡, 伊藤伸一, 冨重圭一, 国森公夫

触媒　43　(6)　408-410　2001/09/10
Publisher: 触媒学会
ISSN： 0559-8958
地球温暖化ガスN2OおよびCH4のFeイオン交換ゼオライト触媒による同時除去

亀岡聡, 武田享弘, 喜多賢二, 田中伸一, 湯崎浩一, 伊藤伸一, 宮寺達雄, 国森公夫

触媒　42　402-404　2000/09
酸化物触媒表面におけるプラズマ励起窒素の反応挙動

亀岡聡, 黒田稔, 栗山隆, 伊藤伸一, 国森公夫

触媒　38　164-167　1996/03
プラズマ励起を用いる不活性小分子の活性化と表面解析

亀岡聡, 国森公夫

表面　32　(4)　250-258　1994
Publisher: 広信社
ISSN： 0367-648X

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Books and Other Publications 4

「触媒の設計・反応制御事例集」, 準結晶合金を用いた触媒調製

亀岡聡, 田邉豊和, 蔡安邦

技術情報協会　2013/04
「触媒調製ハンドブック」, Au-Cu系合金触媒

亀岡聡

エヌ・ティー・エス　2011/04
Surface properties and engineering of complex intermetallics, “Quasicrystals dealing with catalysis”

A.P. Tsai, S. Kameoka

World Scientific Publishing Co. Ltd.　2010
「環境触媒ハンドブック」、銀／アルミナ系触媒による脱硝

宮寺達雄, 亀岡聡, 浮須祐二

エヌ・ティー・エス　2001

Presentations 19

Creation of novel catalytic functions using hypermaterial Al-Pd-Ru alloys

T. Susaki, T. Fukushima, S. Ohhashi, N. Fujita, S. Kameoka

18th International Congress on Catalysis, Lyon, France　2024/07/15
Creation of novel catalytic functions using hypermaterial alloys Invited

T. Susaki, T. Fukushima, S. Ohhashi, N. Fujita, S. Kameoka

International conference on complex orders in condensed matter: aperiodic order, local order, electronic order, hidden order, Evian, France.　2023/09/28
水素吸蔵合金を用いた新奇触媒材料の創製 Invited

亀岡聡

日本金属学会2023年秋期講演大会, S2シンポジウム水素エネルギー材料X　2023/09/22
One-step synthesis of non-equilibrium Pd-Ru alloys from Al-Pd-Ru quasicrystals and approximants

T. Fukushima, R. Tsukuda, S. Ohhashi, N. Fujita, S. Kameoka

Aperiodic 2022　2022/06/22
金属間化合物の活性化処理による新奇触媒材料の創製 Invited

亀岡聡

S8シンポジウム金属表面の材料化学－めっき・耐食性・耐酸化性・触媒研究の新展開－日本金属学会2022年春期講演大会　2022/03/17
ハイパーマテリアルを利用した新奇触媒材料の創製 Invited

亀岡聡

科学研究費補助金新学術領域研究ハイパーマテリアル:補空間が創る新物質科学（研究領域提案型）、第16回ハイパーマテリアルセミナー　2021/11/01
Heritage from Professor An Pang Tsai to the research field of metallic catalysis materials Invited

S. Kameoka

IUCr2021　2021/08/15
金属の組織・形態を利用した新奇触媒材料の創製と機能創出 Invited

亀岡聡

日本鉄鋼協会・日本金属学会関西支部鉄鋼プロセス研究会・材料化学研究会令和２年度合同講演会　2020/12/15
金属微細組織制御を利用した新規の触媒調製 Invited

亀岡聡

第29回日本素材物性学会令和元年度年会特別講演　2019/06/25
Preparation of novel catalytic materials based on metallurgy Invited

S. Kameoka

Tohoku-Tsinghua Joint Workshop on Materials and Spintronics Science,　2018/07/26
Al基金属間化合物のリーチング処理によるナノ・バルクハイブリット触媒材料の創製 Invited

亀岡聡, 蔡安邦

S3シンポジウム金属表面の材料化学－めっき・耐食性・耐酸化性・触媒研究の新展開－, 日本金属学会2018年春期講演大会　2018/03/21
金属の組織・形態制御による新奇な触媒材料創製 Invited

亀岡聡

触媒学会西日本支部第8回触媒科学研究発表会　2017/06/09
CeNi5-xAlx金属間化合物の水素吸蔵およびその触媒活性 Invited

亀岡聡

機能無機物質シンポジウム：「水素エネルギー材料の多様性」　2017/04/14
Metallurgical design of catalysis materials: control of microstructures and electronic states for alloys Invited

S. Kameoka

International Conference on Electronic Materials 2014　2014/06/13
放射光を利用したユニークな組織・形態を有するバルク型金属触媒のキャラクタリゼーション Invited

亀岡聡

平成25年度文科省ナノＰＦ事業微細構造解析ＰＦ利用研究セミナー　2013/08/23
金属組織制御を利用した複相ポーラス貴金属触媒材料の調製 Invited

亀岡聡

日本金属学会触媒材料研究会ミニシンポジウム「貴金属ポーラス体の微細構造と反応特性」　2013/01/08
金属組織制御を利用した新しい触媒材料の調製 Invited

亀岡聡

S5シンポジウム金属学からの新しい触媒材料の設計と開発日本金属学会2011年秋期講演大会　2011/11/08
Self-assembled nanoarchitecture for novel porous metal-oxide composited catalysis materials Invited

S. Kameoka

Materials for Green Energy　2010/11/08
Advanced metallic materials for catalysis

S. Kameoka

Tohoku University & National Taipei University of Technology 2022 Online Joint Symposium　2022/11/28

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Research Projects 14

Metallurgy of foil-type metal catalysts using nanocarbon synthesis as a probe reaction

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: Tohoku University

2022/04/01 - 2025/03/31
Creation of novel catalytic functions using hypermaterial alloys as a platform

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

2022/04/01 - 2024/03/31
ナノカーボン合成反応を利用したハイパー物質表面の状態解析と新奇触媒機能創出

亀岡聡

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 新学術領域研究(研究領域提案型)

Institution: 東北大学

2020/04/01 - 2022/03/31

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本研究では、ハイパーマテリアルの代表格である準結晶・近似結晶合金の触媒材料への応用展開を目指し、表面構造と触媒特性（“実条件下”での）の相関性を評価・解析する手法として、ナノカーボン（カーボンナノチューブやカーボンナノファイバー等の総称）合成反応をプローブにすることを提案し、それを検証し次の成果を得た。（１）Al基準結晶試料での大気暴露における試料表面の酸化の影響が大きいことがわかった。その結果、以後、試料は全てAr雰囲気中のグローブボックス中で（試料粉砕 → 反応管への試料充填）取り扱い、大気に曝さずに反応器に取り付ける工夫を行った。（２）Al13Fe4準結晶粒（グローブボックス中で取扱った試料）において同一粒子内でナノカーボンが生成する部分としない部分が確認され、表面露出面によるナノカーボンの形成特性の違いが明らかとなった（ナノカーボン合成をプローブとする手法の有効性を検証）。（３）D-AlNiCo（Al70Ni15Co15 (at%)；mono-grain）に対して、600oCで3hのC2H4処理を行うと直径約100nmの鎖状カーボンナノファイバーが生成し、主に２回軸方向の面から形成していることがわかった。これは２回軸方向の構造由来のNiとCoの濃度揺らぎや面間隔の粗密構造が炭素析出速度に影響を及ぼしていると考えている。また、CNF生成に関わる活性カーボン種の生成速度は反応条件にも非常に敏感であることが確認できた。（４）Icosahedral型P40-AlPd(Ru, Fe)近似結晶においてC2H2水素化反応（ナノカーボン合成とは温度域だけが異なる）を行うと市販のLindlar（Pd系）触媒を凌ぐ活性が得られ、この活性発現には、近似結晶を構成しているマッカイクラスター中に存在するAl2Pd (triangle site) が活性サイトになっていることが示唆された。
Unveiling catalytic mechanism of Heusler alloys

Kojima Takayuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

2019/04/01 - 2022/03/31

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Intermetallic compounds, special type of alloys, exhibit novel catalytic properties originated from unique electronic structures and atomic ordered surfaces. The PI previously discovered novel catalysts in Heusler alloys (X2YZ) including Co2FeGe Heusler alloys for selective hydrogenation of alkynes. In this project, we aimed to unveil catalytic mechanisms in Heusler alloys including Co2FeGe. A variety of samples in forms of micron powders, fine powders, nanoparticles, and epitaxial single crystal thin films was investigated for several reactions including selective hydrogenation of alkynes, steam reforming of methanol, and dehydrogenation of 2-propanol. This investigation from various aspects unveiled the mechanisms and additionally revealed a durability.
Verification of selective leaching process using single-phase Raney alloys and creation of nano-bulk hybrid catalysts

Kameoka Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: Tohoku University

2018/04/01 - 2021/03/31

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Raney-type catalysts are well known as bulk metal catalysts having extremely high catalytic activities. In this study, the leaching behaviors were investigated using the intermetallic compound Al2Au (single crystal or single-phase), which is a typical Al-based Raney alloy. We also compared the leaching behaviors of the solid solution Ag3Au. Both Al2Au and Ag3Au formed porous structures, although there were differences in morphology due to the leaching process. Interestingly, the porous Au from Al2Au had many stacking faults (twinning) as a characteristic difference. Furthermore, in the hydrogenation reaction of acetylene, the porous body obtained from Al2Au showed the high semi-hydrogenation of acetylene, and the expression of novel characteristics was also clarified. It has been clarified that the difference in leaching process (mechanism) due to the difference in crystal structures of precursor alloys leads to a great influence on their internal structures and microstructures.
Lattice defects (nano-twin) and origin of activity for bulk metallic catalysts

Tsai Anpang

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: Tohoku University

2015/04/01 - 2019/03/31

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We have proposed a new mechanism for creation of catalytically active sites in porous Au. The existence of low-coordinated atomic sites on the surface is essential for understanding the catalytic activity of nanostructured Au. Samples of porous Au prepared by leaching Al2Au exhibit high catalytic activity towards CO oxidation. The presence of quite common nano-twins in the fcc lattice of porous Au significantly correlates with the catalytic activity. On the {211} surfaces of porous Au the twin boundaries can form chains of atoms with coordination number CN=6, which is denoted as W-chains. In contrast to the usually considered isolated low-coordinated active sites in Au as the corners of nanoparticles or the kinks on stepped of surfaces the W-chains form long rows of active Au sites. DFT calculations show that on the W-chains O2 chemisorbs and activated.
Control of microstructure for eutectic alloys and development of novel catalytic materials

KAMEOKA satoshi, TSAI An Pang, NOZAWA Kazuki, YUBUTA Kunio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: Tohoku University

2012/04/01 - 2015/03/31

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In this project, we investigated correlation between the catalytic properties and the metal-metal mutual interaction (e.g., solid solutions, intermetallic compounds and immiscible) in terms of metallurgy. We demonstrated that the formation of alternately layered structure, e.g., Al5Fe2/Al2Pt/Al5Fe2, with an interspacing about ～200 nm in a conventionally solidified alloy (e.g., Al-Pt-Fe alloy). Alloys solidify through a so-called eutectic reaction normally show the interspacing around 10μm, but that appeared in the Al-Pt-Fe is almost smaller by two order. The catalyst improved the catalytic performance and/or created a novel catalytic function, depending on the combination of metals. We developed a fine alternately layered nanoporous composite and a novel alloy with useful for catalysis materials.
Self-organization of nanostructure by dealloying of intermetallic compounds for creating novel catalytic function

TSAI anpang, KAMEOKA Satoshi, FUJITA Nobuhisa, NISHIMURA Chikashi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: Tohoku University

2011/04/01 - 2015/03/31

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We have studied microstructure and catalytic properties for leaching Al-base intermetallic compounds. It has been clear the microstructure after leaching is dominated by oxidation ability of the metals formed intermetallic compounds with Al. A lamellar Fe3O4/Pt/Fe3O4 prepared by leaching Al-Pt-Fe alloy exhibited significant catalytic activity and selectivity upon steam reforming of methanol (SRM). The Pt and Fe3O4 were primarily responsible for the catalysis of the decomposition of methanol and water gas shift reaction, respectively. These two reactions work together in a complementary way to facilitate the overall SRM reaction. We demonstrate that a composite structure is available to couple two separate reactions to obtain a new catalytic function. We developed Pt/Fe3O4 catalyst with high activity upon CO oxidation, prepared by leaching an Al-Fe-Pt alloy with a minute amount of Pt and a new process to synthesize a composite catalyst Cu/CeO2/Ag by oxidation of amorphous alloy.
Catalytic properties of quasicrystal alloys and their application to catalytic materials

KAMEOKA Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2012/04/01 - 2014/03/31

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Most Al-based quasicrystals (QCs) contain catalytically active metals such as Pd, Ni or Cu. Therefore, the catalytic properties of some QCs have been examined so far and results are found to be promising. The quasiperiodic structure of the Al-Cu-Fe QC plays an important role in the formation of a homogeneous leached layer that is responsible for the high activity and stability for steam reforming of methanol (SRM). In this study, we found that nanocrytalline Pd-TM alloys can be prepared by the selective leaching of Al from Al-Pd-TM (TM=Ni, Co) QCs. Alloying between Pd and TM occurred in a self-assembled manner during leaching process. The advantage of this method is that there is no restriction of reduction properties of the constituent metals because neither metal complexes nor metal salts were used in the process, and hence instead of core-shell structure, a homogeneous solid solution would be formed in nanoparticles.
Fabrication of non-equilibrium nanoparticles by selective leaching and their catalytic properties

TSAI An-pang, KAMEOKA Satoshi, FUJITA Nobuhisa, ISHIKAWA Kazuhiro, SHIMODA Masahiko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2010 - 2011

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It has been found that selective leaching of Al on ternary Al alloys facilitates formation of nonequilibrium phases composed of remaining elements. This process can force the formation of non-equilibrium states which could no reached by melt-spinning method. By applying this process, we found that PdNi nanoparticles formed as a product of leached Al-Pd-Ni alloy showed high activity over CO oxidation reaction comparable with Pt. In summary, we have demonstrated that the leaching is not only a process synthesizing catalysts but also an available process for preparing nonequilibrium phases.
Development of alloys replacing rare metals for catalysis

TSAI An-pang, KAMEOKA Satoshi, ISHII Yasushi, FUJITA Nobuhisa

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: Tohoku University

2007 - 2010

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PdZn shows comparable catalytic selectivity to Cu in steam-reforming of methanol (SRM)reaction reflecting their similar electronic structures near the Fermi level (E_F). First-principles slab calculations for M-Zn (M=Pd, Ni, Pt)reveal that alloying with Zn leads to drastic change in the d-band width of M elements and it is essential for a similar electronic structure to Cu. The reduction of the d-band width is a consequence of the missing M-M pair and the lattice distortion. Measurements for SRM, CO and H_2 adsorptions have been performed for alloy powders of M_<50> Zn_<50> intermetallic compounds and M/ZnO samples and has been verified that chemical properties are expected from calculated electronic density of states (DOS). Unsupported mesoporous intermetallic NiZn and PdZn catalysts are successfully prepared by means of immersion alloying process. The surface areas of resultant alloy catalysts reached over ~ 20 m^2/g. The catalytic properties for steam reforming of methanol (SRM)were completely different from the original unsupported porous Ni and Pd, where the decomposition of methanol and the SRM occurred preferentially on NiCu and PdZn. In terms of selectivity of the reaction, NiCu is very similar to Pd and their similarity in valence DOSs was verified, indicating availability of the idea developed in the present research.
Utilization of New Microwave Heating Methods to Environmental Technology, Energy Saving and Materials' Advanced Processing

YOSHIKAWA Noboru, TAKIZAWA Hirotsugu, MORITA Kazuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Priority Areas

Institution: Tohoku University

2006 - 2010

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In this project, newly developed and investigated microwave heating processes were applied to materials processing and to environmental processing such as treatments of industrial wastes, with detailed consideration on their physical principles. Development of effective heating processes by electric/magnetic field separated heating, which was applied for heating metal particles and films, fundamental study on ferro-magnetic resonance heating and its application to magnetic material processing. On the other hand, energy efficiency and energy saving possibility in the microwave processing processes especially taking advantages of the microwave characteristic heating features in treatment of steel making slag and valuable metal reduction and recycling processes were investigated.
Novel preparation process of composite catalysts in terms of immiscible metal-metal interaction

KAMEOKA Satoshi, TSAI An Pang

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

2007 - 2008
Preparation, Reduction and Catalytic Properties of Precious metal mixed oxides in small pores

KUNIMORI Kimio, KAMEOKA Satoshi

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: University of Tsukuba

1998 - 1999

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In this study, precious metal mixed oxides such as RhVOィイD24ィエD2, RhィイD22ィエD2MnOィイD24ィエD2, RhLaOィイD23ィエD2 have been prepared in small pores of support materials such as silica, USY zeolite, and catalytic properties of these catalysts have been investigated. RhVOィイD24ィエD2 could be prepared in NaY zeolite with the aid of the high mobility of VィイD22ィエD2OィイD25ィエD2 at high temperatures. Highly dispersed Rh metal was obtained by the reduction of the mixed oxides, and strong metal-oxide interaction (SMSI) was induced after the high-temperature reduction. Moreover, the mixed oxide catalysts could be regenerated by the calcination treatment, which leads to high-perfonace catalyst systems. Catalytic reactions such as CO hydrogenation, NィイD22ィエD2O decomposition, selective CO oxidation in hydrogen have been studied on these catalysts. In particular, RhVOィイD24ィエD2 supported on silica showed high activity and high selectivity to ethanol after the reduction of the mixed oxide. Dynamic behavior of molecules in the micropores of zeolite has also been studied.

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