Details of the Researcher

PHOTO

Ryota Osuga
Section
Institute of Multidisciplinary Research for Advanced Materials
Job title
Associate Professor
Degree

  • (Tokyo Institute of Technology)

e-Rad No.
30874250

Research History 6

  • 2026/07 - Present
    Hokkaido University　Institute for Catalysis

  • 2026/04 - Present
    Tohoku University　Institute of Multidisciplinary Research for Advanced Materials

  • 2023/02 - 2026/03
    Hokkaido University　Institute for Catalysis

  • 2020/11 - 2023/01
    Tohoku University　Institute of Multidisciplinary Research for Advanced Materials

  • 2020/04 - 2020/10
    Tokyo Institute of Technology　Nanospace Catalysis Unit

  • 2020/01 - 2020/03
    Tokyo Institute of Technology　Institute of Integrated Research Laboratory for Chemical and Lfi Science

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Education 3

  • Tokyo Institute of Technology　School of Materials and Chemical Technology

    2017/04 - 2019/12

  • Tokyo Institute of Technology

    2015/04 - 2017/03

  • Ibaraki National College of Technology　Advanced Course

    2013/04 - 2015/03

Committee Memberships 12

  • 触媒学会会誌編集委員会　委員

    2025/05 - Present

  • 石油学会ジュニア・ソサイアティ　副代表

    2025/05 - Present

  • 触媒学会参照触媒委員会　委員

    2025/05 - Present

  • 19th International Congress on Catalysis, Young Scientists Committee　Committee Member

    2024/07 - Present

  • 触媒学会若手会　委員

    2020/05 - Present

  • 石油学会ジュニア・ソサイアティ　幹事

    2022/05 - Present

  • TOCAT10 Pre-Symposium in Sendai　Committee Member

    2026/02 - 2026/08

  • 化学系学協会北海道支部2025年冬季研究発表会　実行委員

    2024/04 - 2025/01

  • 化学系学協会北海道支部2024年冬季研究発表会　実行委員

    2023/04 - 2025/01

  • 第132回触媒討論会　現地実行委員

    2023/02 - 2023/09

  • Post Symposium of TOCAT9 in Sendai, Organizing Committee　Committee Member

    2022/05 - 2022/07

  • 触媒学会若手会　第32回フレッシュマンゼミナール運営委員長

    2021/03 - 2021/05

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Professional Memberships 4

  • 日本ゼオライト学会

    2016 - Present

  • 石油学会

    2016 - Present

  • 触媒学会

    2016 - Present

  • 日本化学会

    2013 - Present

Research Interests 8

  • Lower hydrocarbons

  • 複合酸化物

  • Biomass

  • Methane

  • Porous materials

  • Infrared spectroscopy

  • Solid Catalyst

  • Zeolite

Research Areas 3

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

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

  • Nanotechnology/Materials / Inorganic compounds/materials chemistry /

Awards 8

  1. Emerging talent in sustainability research

    2025/06　ChemSusChem, Wiley　Bio‐Based Phenol from Cashew Nutshells by Catalytic Hydrocardanol Trans‐Alkylation Using H‐ZSM‐5 Zeolite

  2. 石油学会論文賞

    2023/05　石油学会　メカノケミカル法を用いたFe置換MWW型ゼオライトの合成

  3. 若手優秀講演者賞, ゼオライト学会第38回研究発表会

    2022/03　日本ゼオライト学会　フッ素を用いないハイシリカCHA型アルミノシリケートの合成とMTO反応活性評価

  4. 若手優秀講演者賞, ゼオライト学会第35回研究発表会

    2019/12　日本ゼオライト学会　赤外分光法を用いたゼオライト上の活性化エーテル種に関する検討

  5. Best Presentation Award, 第48回石油・石油化学討論会

    2018/10　石油学会　Infrared investigation of dehydration of ethanol over zeolites

  6. Excellent poster awards

    2018/09　The Taiwan Japan US Joint Workshop on Energy Materials and Sustainable Development　IR investigation of curvature effect of mesoporous silica for acetalization of cyclohexanone

  7. USRDECOM – PhD US students travel awards

    2018/04　International Congress on Operando Spectroscopy　Mechanism of ethanol dehydration via surface ethoxy intermediate over acidic sites on H-ZSM-5

  8. 若手優秀講演者賞, ゼオライト学会第33回研究発表会

    2017/12　日本ゼオライト学会　プロトン型ゼオライトの格子酸素の塩基性と触媒反応との関わり

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Papers 85

  1. Reusable Nitrogen‐Doped Carbon‐Encapsulated Cobalt Catalyst for Efficient Stepwise Oxidation of Acetal‐Protected 5‐Hydroxy‐Methylfurfural to Furan‐2,5‐Dicarboxylic Acid Invited Peer-reviewed

    Jan J. Wiesfeld, Ryota Osuga, Satoshi Suganuma, Emiel J. M. Hensen, Kiyotaka Nakajima

    ChemSusChem　19　(17)　e71023　2026/09/04

    Publisher: Wiley

    DOI： 10.1002/cssc.71023 　

    ISSN： 1864-5631

    eISSN： 1864-564X

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    We report a ZIF‐67‐derived N‐doped carbon‐encapsulated cobalt catalyst (Co@N‐C) for the efficient, reusable, and noble metal‐free aerobic oxidation of concentrated aqueous 5‐hydroxymethylfurfural (HMF) derivatives in a stepwise fashion to furan‐2,5‐dicarboxylic acid (FDCA). Using acetal‐protected HMF with propane‐1,3‐diol (PD‐HMF) to suppress degradation at high substrate concentrations, Co@N‐C‐800p (Co‐containing ZIF‐67 pyrolyzed at 800 °C) delivers high yields in water while enabling effective PDO recovery. At 20 wt% PD‐HMF, a 96.8% yield of PD‐FFCA (acetal‐protected form of FFCA, 5‐formylfuran‐2‐carboxylic acid) was obtained at 99.2% conversion. Subsequent deprotection afforded FFCA and enabled recovery of propane‐1,3‐diol, after which FFCA was oxidized separately under the same conditions to FDCA in a 93.6% yield. Replacing soluble alkali carbonates with sparingly soluble Ca(OH) 2 provides buffered alkalinity that enhances formyl group oxidation, minimizes by‐products, and limits PDO loss at reduced base loadings. Radical scavenger experiments indicate a mechanism involving oxygen‐derived species that regenerate metallic Co sites via hydride removal. Although partial deactivation occurs through cobalt surface oxidation and CaCO 3 accumulation, full catalytic performance is restored by re‐pyrolysis. Overall, this work establishes Co@N‐C as an efficient, stable, and regenerable non‐noble metal catalyst for aerobic FDCA production at industrially relevant substrate concentrations.

  2. Brine-Free Regeneration of Ruthenium-Loaded Anion-Exchange Resin for Nitrate Removal Peer-reviewed

    Bobo Yan, Chiao-Ling Kuo, Ling-Yuan Xia, Fa-Kuen Shieh, Yimin Zheng, Yuan Huang, Shuhei Shimoda, Ryota Osuga, Ryoichi Otomo, Yuichi Kamiya

    ACS ES&T Water　2026/07/30

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acsestwater.6c00183 　

    eISSN： 2690-0637

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    Abstract Conventional regeneration of anion-exchange (AX) resin for nitrate (NO3–) removal relies on brine, generating nitrate-rich waste brine that requires costly post-treatment. In this study, we developed a brine-free regeneration method by introducing ruthenium nanoparticles into AX resin (Ru@AER), enabling catalytic decomposition of NO3– within the resin. Uniformly dispersed Ru nanoparticles (∼2 nm) were successfully formed throughout the resin, allowing regeneration of more than 99% of the ion-exchange sites. The regeneration efficiency strongly depended on the water content of the resin, and a water content of 48% achieved a regeneration rate exceeding 99%, owing to enhanced diffusion of NO3– and OH– within the resin matrix. Product analysis showed that NO3– was converted mainly to N2 with 86% selectivity, while NH3 was formed as a minor product (14% selectivity). A reaction mechanism is proposed in which NO3– diffuses through the aqueous phase in the resin matrix, is catalytically reduced on Ru nanoparticles, and is continuously replaced by OH– at ion-exchange sites, resulting in complete regeneration of the resin. Ru@AER catalyst maintained high regeneration performance over at least six consecutive cycles, demonstrating the feasibility of a sustainable brine-free regeneration process for nitrate-removal resins.

  3. Tuning Metal–Acid Cooperativity of Beta Zeolite-Supported Pt Catalysts for Selective Hydrogenolysis of 5-Hydroxymethylfurfural to Methyl Levulinate Peer-reviewed

    Apinya Wijitrat, Nuttapat Thiensuwan, Yin Liu, Hannarong Pitayachinchot, Ryota Osuga, Kiyotaka Nakajima, Chawalit Ngamcharussrivichai, Toshiyuki Yokoi

    ACS Sustainable Chemistry & Engineering　14　(29)　13098-13113　2026/07/13

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acssuschemeng.6c02311 　

    eISSN： 2168-0485

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    Abstract The selective hydrogenolysis of biomass-derived 5-hydroxymethylfurfural (HMF) to methyl levulinate (ML) is challenging due to competing side reactions and the instability of conventional metal–acid bifunctional catalysts. Herein, we report the first demonstration of beta zeolite-supported Pt catalysts (Pt/BEA) that enable highly selective conversion of HMF to ML through precise control of framework composition, acidity, and metal–support interactions. Systematic tuning of the Si/Al ratio and Pt loading reveals that framework Al is essential for generating Brønsted acidity and stabilizing active Pt species within a Lewis-acidic environment. Pyridine-Fourier-transform infrared analysis identifies 0.5Pt/BEA-12.5 as the optimal catalyst, exhibiting a balanced Brønsted/Lewis acidity where Lewis sites activate carbonyl intermediates while moderated Brønsted acidity promotes esterification without excessive humin formation. Structural and electronic characterizations confirm the synergistic coexistence of metallic Pt0 and electrophilic Ptδ+ species, facilitating efficient H2 dissociation and selective hydrogenolysis pathways. Under optimized conditions, >99% HMF conversion with 92.0% ML yield is achieved at low Pt loading. Importantly, the catalyst also demonstrates effective ML production from real sugar feedstocks (glucose, fructose, and sucrose), highlighting its practical applicability and sustainability for biomass upgrading to fuel additives and value-added chemicals.

  4. Methane-promoted ammonia production from nitrate in water over zirconia-supported metallic iron Peer-reviewed

    Lingke Miao, Wen Huang, Ryota Osuga, Ryoichi Otomo, Yuichi Kamiya

    Journal of Environmental Chemical Engineering　14　(3)　122135-122135　2026/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.jece.2026.122135 　

    ISSN： 2213-3437

  5. Role of Copper in DME Carbonylation to Methyl Acetate over Mordenite-type Zeolites: A Combined Experimental and DFT Study Peer-reviewed

    Shohei Tada, Keigo Komori, So Nishikawa, Ryota Osuga, Tetsuo Honma, Ryuji Kikuchi, Tatsuya Joutsuka

    The Journal of Physical Chemistry C　130　(21)　7380-7390　2026/05/14

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.jpcc.5c05700 　

    ISSN： 1932-7447

    eISSN： 1932-7455

  6. Controlling Aluminum Siting in Low-Silica Zeolite Frameworks: A Postsynthetic Approach Exemplified by MAZ-type Topology Peer-reviewed

    Yuto Yoshida, Kota Yamashita, Koki Muraoka, Masahito Hasumi, Ryota Osuga, Yutaka Yanaba, Kiyotaka Nakajima, Akira Nakayama, Toru Wakihara, Tatsuya Okubo, Kenta Iyoki

    Chemistry of Materials　38　(3)　1031-1039　2026/01/15

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.chemmater.5c01813 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  7. Catalytic In Situ Acetalization Strategy for High-Yield Synthesis of C 4 - and C 2 -Carbohydrate Derivatives from Glucose Peer-reviewed

    Ryota Osuga, Navya Subray Bhat, Quan Shi, Natsumi Shibayama, Mizuho Yabushita, Satoshi Suganuma, Hiroki Taniguchi, Mizuki Tada, Hideki Kato, Long Zhang, Ivo Filot, Emiel J. M. Hensen, Kiyotaka Nakajima

    ACS Catalysis　16　(2)　1675-1683　2025/12/19

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acscatal.5c08041 　

    ISSN： 2155-5435

    eISSN： 2155-5435

  8. n-Butane Isomerization over Platinum-Loaded Crystalline Zr3SO9 in the Presence of Hydrogen Peer-reviewed

    Meilin Tao, Satoshi Ishikawa, Kosuke Shimoda, Shinta Miyazaki, Yuan Jing, Takashi Toyao, Mizuho Yabushita, Ryota Osuga, Kiyotaka Nakajima, Ken-ichi Shimizu, Wataru Ueda

    ACS Catalysis　15　(17)　14866-14881　2025/08/12

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acscatal.5c04075 　

    ISSN： 2155-5435

    eISSN： 2155-5435

  9. Bio‐Based Phenol from Cashew Nutshells by Catalytic Hydrocardanol Trans‐Alkylation Using H‐ZSM‐5 Zeolite Invited Peer-reviewed

    Jan J. Wiesfeld, Keisuke Iriba, Satoshi Suganuma, Emiel J. M. Hensen, Ryota Osuga, Kiyotaka Nakajima

    ChemSusChem　18　(17)　e202500401　2025/07/07

    Publisher: Wiley

    DOI： 10.1002/cssc.202500401 　

    ISSN： 1864-5631

    eISSN： 1864-564X

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    Cardanol, an unsaturated long‐chain alkylphenol derived from agricultural waste, has potential as a sustainable substrate for bio‐based phenol production. Herein, the potential of hydrocardanol, readily obtained through cardanol hydrogenation, is demonstrated as a viable feedstock for phenol production via trans‐alkylation using toluene as the alkyl acceptor. H‐ZSM‐5 (SiO2/Al2O3 molar ratio = 80) exhibits a 53.7% phenol yield with a high phenolics balance (86.7%) from a 10 wt% hydrocardanol solution at full conversion in a batch reactor. In contrast, cardanol gives only 27.1% phenol under the same reaction conditions. This improved yield with hydrocardanol is attributed to suppressed formation of bi‐ and/or polycyclic phenols via self‐alkylation, due to the higher thermal stability of the saturated side chain. Realkylation of the desired phenol product largely limits the phenol yield. The model reaction experiments with phenol and 1‐pentadecene show that the reaction proceeds via hydrocardanol dealkylation on the zeolite, followed by rapid isomerization, cracking and oligomerization reactions of the resulting long‐chain olefin, and realkylation of toluene and phenol. This indicates that phenol alkylation could be suppressed by reducing the hydrocardanol‐to‐toluene ratio. This approach is validated in a fixed‐bed flow reactor, achieving a high phenol yield (>95%) with a high carbon balance (>99%).

  10. Insight into the Nitrilation Reaction as Catalyzed by Titanium Dioxide Peer-reviewed

    Matthew V. Hickson, Ryota Osuga, Bart Van Meerbeek, Damien P. Debecker, Kiyotaka Nakajima, Ekaterina V. Makshina, Bert F. Sels

    ChemSusChem　18　(16)　e202501043　2025/07

    Publisher: Wiley

    DOI： 10.1002/cssc.202501043 　

    ISSN： 1864-5631

    eISSN： 1864-564X

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    While titanium dioxide has displayed excellent capabilities as a catalyst for the nitrilation reaction, the role that catalyst polymorphism plays in this reaction has remained largely unexplored. Herein, the catalytic capabilities of the anatase and rutile polymorphs regarding the nitrilation reaction are explored. In efforts to clarify structure–activity correlations, sets of these two polymorphs are characterized to determine their polymorphic purity, surface areas, and acidic properties. Initial catalytic investigations encounter considerable challenges, as substantial deactivation is observed when employing ethyl acrylate as a substrate ‐ an issue attributed to the polymerization of the generated acrylonitrile. Stable catalyst performance is achieved using the saturated substrate and ethyl propionate. Investigating the nitrilation reaction using this saturated substrate displays significantly higher catalytic activity on the anatase polymorphs compared to the rutile. The catalytic activity correlated well with the total acid density, and correlations occur independently for both anatase and rutile, emphasizing the impact the catalyst polymorph has on this reaction. Finally, the superior catalytic performance of anatase is rationalized through in situ fourier transform infrared spectroscopy (FTIR) investigation of adsorbed ethyl propionate.

  11. Reductive decomposition of nitrous oxide with hydrogen at room temperature over iridium nanoparticles highly dispersed on silica Peer-reviewed

    Kana Sato, Sora Momma, Yunong Song, Shuhei Shimoda, Ryota Osuga, Ryoichi Otomo, Yuichi Kamiya

    Journal of Environmental Chemical Engineering　13　(3)　116922-116922　2025/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.jece.2025.116922 　

    ISSN： 2213-3437

  12. Cu-Doped TiO2 Nanoparticle-Based Thin Films Obtained via the Mist-Deposition Method and Their Photocatalytic Antibacterial Properties Peer-reviewed

    Quan Zou, Yusuke Yamasaki, Yasutaka Nishi, Masaki Matsubara, Ryota Osuga, Kakeru Ninomiya, Maiko Nishibori, Atsushi Muramatsu, Kiyoshi Kanie

    ACS Applied Engineering Materials　3　(5)　1200-1209　2025/05/07

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acsaenm.5c00071 　

    ISSN： 2771-9545

    eISSN： 2771-9545

  13. Highly Active and Air-Stable Iron Phosphide Catalyst for Reductive Amination of Carbonyl Compounds Enabled by Metal–Support Synergy Peer-reviewed

    Tomohiro Tsuda, Hiroya Ishikawa, Min Sheng, Motoaki Hirayama, Satoshi Suganuma, Ryota Osuga, Kiyotaka Nakajima, Junko N. Kondo, Sho Yamaguchi, Tomoo Mizugaki, Takato Mitsudome

    Journal of the American Chemical Society　147　(17)　14326-14335　2025/04/16

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/jacs.4c18611 　

    ISSN： 0002-7863

    eISSN： 1520-5126

  14. Lewis acid catalysis of phosphate-modified CaNb2O6 for xylose dehydration to furfural Peer-reviewed

    Zijian Wang, Ryota Osuga, Koichiro Endo, Daniele Padovan, Satoshi Suganuma, Atsushi Fukuoka, Hideki Kato, Kiyotaka Nakajima

    Catalysis Science & Technology　15　(9)　2665-2669　2025/03/12

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d5cy00010f 　

    ISSN： 2044-4753

    eISSN： 2044-4761

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    Phosphate-modified CaNb2O6 is a highly active and reusable catalyst for xylose dehydration to furfural.

  15. Remote Activation Catalysis: Interparticle Hydrogen Spillover‐Assisted Cumene Synthesis from Propane and Benzene Peer-reviewed

    Kenta Suzuki, Shingo Hasegawa, Ryota Osuga, Kiyotaka Nakajima, Ken Motokura

    Small　21　(6)　2408226　2025/01/23

    Publisher: Wiley

    DOI： 10.1002/smll.202408226 　

    ISSN： 1613-6810

    eISSN： 1613-6829

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    Abstract Hydrogen spillover, particularly when involving “interparticle” hydrogen spillover, offers a unique opportunity to enhance catalytic efficiency by remote activation of surface acidity. Building on this concept, this study aims to investigate physically mixed alumina‐supported platinum nanoparticles (Pt/Al2O3) and zirconia‐supported tungsten oxide (WO3/ZrO2) in promoting the direct synthesis of cumene from benzene and propane at 300 °C. The reaction with Pt/Al2O3 alone afforded propylene as the only product, indicating the successive reaction route of Pt‐catalyzed dehydrogenation of propane, followed by acid‐catalyzed alkylation. WO3/ZrO2 with 18 wt.% WO3 loading resulted in high benzene conversion (≈5.0%) and cumene selectivity (≈87.5%), which possesses poly tungstate species on the surface that is active for the acid‐catalyzed alkylation. UV–vis‐near infrared spectroscopy, X‐ray photoelectron spectroscopy, and in situ Fourier‐transform infrared spectroscopy analyses revealed that atomic hydrogen abstracted from propane spills over from Pt/Al2O3 particles to WO3/ZrO2 particles to form Brønsted acid sites on the poly tungstate species, whose activity for alkylation between benzene and propylene is double that of the parent WO3/ZrO2.

  16. Quantitative Estimation of Effective Brønsted Acid Sites of Silica-Supported H4SiW12O40 Heteropoly Acid for Adsorption of Various Molecules Peer-reviewed

    Kodai Miyashita, Ryota Osuga, Shuhei Yasuda, Toshiyuki Yokoi, Shintaro Itagaki, Yasuhiro Hosogi, Junko N. Kondo

    Langmuir　41　(2)　1491-1501　2025/01/07

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.langmuir.4c04764 　

    ISSN： 0743-7463

    eISSN： 1520-5827

  17. Roles of Acidic Proton for Fe-Containing Zeolite in Direct Oxidation of Methane Peer-reviewed

    Peipei Xiao, Hiroto Toyoda, Yong Wang, Kengo Nakamura, Samya Bekhti, Ryota Osuga, Maiko Nishibori, Hermann Gies, Toshiyuki Yokoi

    ACS Catalysis　14　(23)　17434-17444　2024/11/12

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acscatal.4c04875 　

    ISSN： 2155-5435

    eISSN： 2155-5435

  18. Revealing Active Sites and Reaction Pathways in Direct Oxidation of Methane over Fe-Containing CHA Zeolites Affected by the Al Arrangement Peer-reviewed

    Peipei Xiao, Lizhuo Wang, Hiroto Toyoda, Yong Wang, Kengo Nakamura, Jun Huang, Ryota Osuga, Maiko Nishibori, Hermann Gies, Toshiyuki Yokoi

    Journal of the American Chemical Society　146　(46)　31969-31981　2024/11/05

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/jacs.4c11773 　

    ISSN： 0002-7863

    eISSN： 1520-5126

  19. Morphological effect of TiO2 nanoparticles in TiO2/g-C3N4 heterojunctions on photocatalytic dye degradation Peer-reviewed

    Zijian Deng, Ryota Osuga, Masaki Matsubara, Kiyoshi Kanie, Atsushi Muramatsu

    Chemistry Letters　53　(9)　upae171　2024/08/26

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/chemle/upae171 　

    ISSN： 0366-7022

    eISSN： 1348-0715

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    Abstract The effects of TiO2 nanoparticle (NP) morphology on the photocatalytic activity of physically assembled TiO2 NP/g-C3N4 heterojunctions (TCNPHY) was investigated. Spherical, spindle and cubic TiO2 NPs were synthesized and separately supported on g-C3N4 nanosheets to form physically assembled TCNPHY catalysts. The photocatalytic activity for methylene blue (MB) degradation observed for TCNPHY with the cubic TiO2 NPs supported higher light absorption and a lower recombination rate; therefore, this was an adequate catalyst for the construction of catalytically active heterojunctions. The cubic-TiO2 TCNPHY exhibited a degradation rate that was 2.2 times higher than that for the g-C3N4 nanosheets alone.

  20. Low-Temperature N-Allylation of Allylic Alcohols via Synergistic Pd/Cu Catalysis: A Silica-Supported Dual-Metal-Complex Strategy Peer-reviewed

    Shunichi Sakai, Shingo Hasegawa, Siming Ding, Ryota Osuga, Kiyotaka Nakajima, Shinji Tanaka, Wang-Jae Chun, Ken Motokura

    ACS Catalysis　14　(7)　4835-4846　2024/03/15

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acscatal.4c00638 　

    ISSN： 2155-5435

    eISSN： 2155-5435

  21. A Protection Strategy for High‐yield Synthesis of Dimethyl Furan‐2,5‐dicarboxylate from 5‐Hydroxymethylfurfural Using Methanol as an Acetalizing Agent Peer-reviewed

    Nirupama Sheet, Ryota Osuga, Nao Arai, Jan J. Wiesfeld, Satoshi Suganuma, Takayuki Aoshima, Atsushi Fukuoka, Emiel J. M. Hensen, Kiyotaka Nakajima

    ChemCatChem　16　(4)　e202301259　2024/01/23

    Publisher: Wiley

    DOI： 10.1002/cctc.202301259 　

    ISSN： 1867-3880

    eISSN： 1867-3899

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    Abstract Developing efficient catalytic processes for obtaining biobased monomers for plastics can significantly contribute to a more sustainable economy. The biomass‐derived and chemical platform 5‐hydroxymethylfurfural (HMF) can be converted to various key intermediates, which is often hampered by side reactions due to the reactive nature of the formyl group in HMF. Here, we present a stepwise approach involving a protecting agent to obtain dimethyl furan‐2,5‐dicarboxylate (MFDC), which is a monomer for polyalkylene furanoates, a new class of biobased polyesters. Methanol is used as a solvent, reactant, and protecting agent for HMF's formyl group. In the first step, the oxidative esterification of the hydroxymethyl group to methyl carboxylate in HMF‐dimethylacetal catalyzed by Au/CeO2 affords methyl 5‐formylfuran‐2‐carboxylate dimethylacetal (MFFC‐acetal) in high yields (>90 %) from concentrated methanolic solutions (~20 wt %). Without protecting agent, a mixture of methyl‐5‐hydroxymethylfuran‐2‐carboxylate (MHMFC), MFDC, and humin byproduct was obtained. The deprotection of MFFC‐acetal in the second step proceeded efficiently in acetone with Amberlyst‐15, affording MFFC in a >90 % yield. In the final step, oxidative esterification of MFFC in methanol (10 wt %) afforded MFDC in a 93 % yield using Au/CeO2. The acetal protection strategy with methanol offers an efficient route toward MFDC in two oxidative esterification steps.

  22. Overview of intentional formation of paired heteroatom sites in zeolite frameworks Invited Peer-reviewed

    Mizuho Yabushita, Ryota Osuga, Yoshinao Nakagawa, Satoshi Suganuma, Kiyotaka Nakajima, Keiichi Tomishige

    CrystEngComm　26　(33)　4405-4417　2024

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d4ce00505h 　

    eISSN： 1466-8033

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    Intentional placement of two heteroatoms in close proximity in zeolite frameworks is an important task for developing fine-tuned catalysts and ion exchangers and has been achieved via three different strategies.

  23. Formation of paired Ga sites in CHA-type zeolite frameworks via a transcription-induced method Invited Peer-reviewed

    Takumi Kaneko, Mizuho Yabushita, Ryota Osuga, Yugo Sawada, Kei Sato, Ben Liu, Yoshinao Nakagawa, Kiyotaka Nakajima, Keiichi Tomishige

    Chemical Communications　60　(27)　3681-3684　2024

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d4cc00186a 　

    ISSN： 1359-7345

    eISSN： 1364-548X

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    Paired Ga sites were firstly and intentionally constructed in CHA-type zeolite frameworks via the transcription of pre-formed paired species in Ga-rich amorphous silica–gallia.

  24. Oxidative Esterification of Acetal-Protected 5-Hydroxymethylfurfural to Dimethyl Furan-2,5-dicarboxylate with High Recovery of Protecting Agent Peer-reviewed

    Jan J. Wiesfeld, Ryota Osuga, Satoshi Suganuma, Takayuki Aoshima, Emiel J.M. Hensen, Kiyotaka Nakajima

    ACS Sustainable Chemistry & Engineering　12　(1)　450-458　2023/12/26

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acssuschemeng.3c06275 　

    ISSN： 2168-0485

    eISSN： 2168-0485

  25. One-Pot Synthesized Fe-AEI Zeolite Catalysts Contribute to Direct Oxidation of Methane Peer-reviewed

    Peipei Xiao, Kengo Nakamura, Yao Lu, Jun Huang, Lizhuo Wang, Ryota Osuga, Maiko Nishibori, Yong Wang, Hermann Gies, Toshiyuki Yokoi

    ACS Catalysis　13　(24)　16168-16178　2023/12/04

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acscatal.3c04675 　

    ISSN： 2155-5435

    eISSN： 2155-5435

  26. Effect of Contact Mode of TiO2/g-C3N4 Heterojunction on Photocatalytic Performance for Dye Degradation Peer-reviewed

    Zijian Deng, Ryota Osuga, Masaki Matsubara, Kiyoshi Kanie, Atsushi Muramatsu

    MATERIALS TRANSACTIONS　64　(12)　2782-2791　2023/12/01

    Publisher: Japan Institute of Metals

    DOI： 10.2320/matertrans.mt-m2023092 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  27. Construction of Paired Al Sites in High-silica MFI-type Zeolite Framework via Transcription-induced Method Peer-reviewed

    Yoshiyasu Imanishi, Ryota Osuga, Atsushi Muramatsu, Mizuho Yabushita

    Journal of the Japan Petroleum Institute　66　(6)　246-253　2023/11

    DOI： 10.1627/jpi.66.246 　

  28. Highly Effective Cu/AEI Zeolite Catalysts Contribute to Continuous Conversion of Methane to Methanol Peer-reviewed

    Peipei Xiao, Yong Wang, Kengo Nakamura, Yao Lu, Trees De Baerdemaeker, Andrei-Nicolae Parvulescu, Ulrich Müller, Dirk De Vos, Xiangju Meng, Feng-Shou Xiao, Weiping Zhang, Bernd Marler, Ute Kolb, Ryota Osuga, Maiko Nishibori, Hermann Gies, Toshiyuki Yokoi

    ACS Catalysis　13　(16)　11057-11068　2023/08/07

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acscatal.3c02271 　

    ISSN： 2155-5435

    eISSN： 2155-5435

  29. Dissociative H2 adsorption on 1-butyl-3-methylimidazolium-exchanged mordenite monitored by Infrared spectroscopy Peer-reviewed

    Eisuke Yoda, Ryota Osuga

    Reaction Kinetics, Mechanisms and Catalysis　136　(2)　621-635　2023/03/20

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s11144-023-02364-5 　

    ISSN： 1878-5190

    eISSN： 1878-5204

  30. Acid Catalysis over Crystalline Zr3SO9: Role of the Local Structure in Generating Acidity Peer-reviewed

    Meilin Tao, Satoshi Ishikawa, Takuji Ikeda, Shunsaku Yasumura, Kosuke Shimoda, Ryota Osuga, Yuan Jing, Takashi Toyao, Ken-ichi Shimizu, Hiromi Matsuhashi, Wataru Ueda

    ACS Catalysis　13　(7)　4517-4532　2023/03/20

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acscatal.3c00225 　

    ISSN： 2155-5435

    eISSN： 2155-5435

  31. Zeolite-based catalysts for oxidative upgrading of methane: design and control of active sites Invited Peer-reviewed

    Mizuho Yabushita, Ryota Osuga, Toshiyuki Yokoi, Atsushi Muramatsu

    Catalysis Science & Technology　13　(14)　4020-4044　2023

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d3cy00482a 　

    ISSN： 2044-4753

    eISSN： 2044-4761

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    Various reported active sites in zeolite-based catalysts categorized into three groups in terms of their origin have been overviewed from the viewpoints of their performance, structure, and catalysis.

  32. Impacts of framework Al distribution and acidic properties of Cu-exchanged CHA-type zeolite on catalytic conversion of methane into methanol followed by lower hydrocarbons Peer-reviewed

    Kengo Nakamura, Peipei Xiao, Ryota Osuga, Yong Wang, Shuhei Yasuda, Takeshi Matsumoto, Junko N. Kondo, Mizuho Yabushita, Atsushi Muramatsu, Hermann Gies, Toshiyuki Yokoi

    Catalysis Science & Technology　13　(9)　2648-2651　2023

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d3cy00127j 　

    ISSN： 2044-4753

    eISSN： 2044-4761

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    This work highlighted the significance of the Al distribution in the CHA-type zeolite in the formation of active Cu species for the oxidative conversion of CH4; isolated Al atoms in the zeolite framework are found to be advantageous for producing CH3OH.

  33. Development of Hf-containing SBA-15 catalysts with highly dispersed active sites for 1,3-butadiene production from ethanol and acetaldehyde Peer-reviewed

    Ryota Osuga, Peixuan Fang, Haruka Nishiyama, Koji Takizawa, Noritoshi Yagihashi, Toshiyuki Yokoi, Junko N. Kondo

    Microporous and Mesoporous Materials　346　112278-112278　2022/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.micromeso.2022.112278 　

    ISSN： 1387-1811

  34. Pd–H Species on Electrode Stabilized by Solvent Co-Adsorption: Observation by Operando IR Spectroscopy Peer-reviewed

    Junko N. Kondo, Shuo Ge, Tomohiro Suzuki, Ryota Osuga, Takeshi Matsumoto, Toshiyuki Yokoi, Yugo Shimizu, Atsushi Fukazawa, Naoki Shida, Mahito Atobe

    The Journal of Physical Chemistry C　126　(45)　19376-19385　2022/11/17

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.jpcc.2c05127 　

    ISSN： 1932-7447

    eISSN： 1932-7455

  35. Improvement of Catalytic Activity of Ce-MFI-Supported Pd Catalysts for Low-Temperature Methane Oxidation by Creation of Concerted Active Sites Peer-reviewed

    Ryota Osuga, Atsushi Neya, Motohiro Yoshida, Mizuho Yabushita, Shuhei Yasuda, Sachiko Maki, Kiyoshi Kanie, Toshiyuki Yokoi, Atsushi Muramatsu

    Industrial & Engineering Chemistry Research　61　(27)　9686-9694　2022/07/13

    DOI： 10.1021/acs.iecr.2c01410 　

    ISSN： 0888-5885

    eISSN： 1520-5045

  36. Development of synthetic route for Fe-substituted MWW zeolites using mechanochemical method Peer-reviewed

    Ryota Osuga, Ginpei Tanaka, Mizuho Yabushita, Kakeru Ninomiya, Sachiko Maki, Maiko Nishibori, Kiyoshi Kanie, Atsushi Muramatsu

    Journal of the Japan Petroleum Institute　65　(2)　67-77　2022/03

    Publisher: Japan Petroleum Institute

    DOI： 10.1627/jpi.65.67 　

    ISSN： 1346-8804

    eISSN： 1349-273X

  37. Selective synthesis of 5-hydroxymethylfurfural over natural rubber–derived carbon/silica nanocomposites with acid–base bifunctionality Peer-reviewed

    Satit Yousatit, Ryota Osuga, Junko N. Kondo, Toshiyuki Yokoi, Chawalit Ngamcharussrivichai

    Fuel　311　122577-122577　2022/03

    DOI： 10.1016/j.fuel.2021.122577 　

    ISSN： 0016-2361

    eISSN： 1873-7153

  38. Surfactant-Assisted Direct Crystallization of CON-Type Zeolites with Particle Size and Acid-Site Location Controlled Peer-reviewed

    Masato Sawada, Takeshi Matsumoto, Ryota Osuga, Shuhei Yasuda, Sungsik Park, Yong Wang, Junko N. Kondo, Hiroaki Onozuka, Susumu Tsutsuminai, Toshiyuki Yokoi

    Industrial & Engineering Chemistry Research　61　(4)　1733-1747　2022/02/02

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.iecr.1c04447 　

    ISSN： 0888-5885

    eISSN： 1520-5045

  39. Supported Nickel Zeolite Catalyst for Oxidative Conversion of Methane: Effect of Heteroatoms in the Zeolite Framework on Its Physicochemical and Catalytic Properties Peer-reviewed

    Shuhei Yasuda, Yusuke Kunitake, Ryota Osuga, Kengo Nakamura, Takeshi Matsumoto, Keita Sago, Junko N. Kondo, Mizuho Yabushita, Atsushi Muramatsu, Toshiyuki Yokoi

    Chemistry Letters　51　(1)　46-49　2022/01/05

    DOI： 10.1246/cl.210563 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  40. Fluoride-free synthesis of high-silica CHA-type aluminosilicates by seed-assisted aging treatment for starting gel Peer-reviewed

    Ryota Osuga, Mizuho Yabushita, Takeshi Matsumoto, Masato Sawada, Toshiyuki Yokoi, Kiyoshi Kanie, Atsushi Muramatsu

    Chemical Communications　58　(82)　11583-11586　2022

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d2cc04032h 　

    ISSN： 1359-7345

    eISSN： 1364-548X

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    High-silica CHA-type aluminosilicates (Si/Al molar ratio > 100) were synthesized hydrothermally in the absence of fluoride media, where the seed-assisted aging treatment played an important role on the crystallization. These...

  41. Clarification of acid site location in MSE-type zeolites by spectroscopic approaches combined with catalytic activity: comparison between UZM-35 and MCM-68 Peer-reviewed

    Hiroto Toyoda, Ryota Osuga, Yong Wang, Sungsik Park, Koji Yazawa, Hermann Gies, Christopher J. Gilbert, Bilge Yilmaz, C. P. Kelkar, Toshiyuki Yokoi

    Physical Chemistry Chemical Physics　24　(7)　4358-4365　2022/01

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d2cp00215a 　

    ISSN： 1463-9076

    eISSN： 1463-9084

    More details Close

    Difference in the acid site location of MSE-type zeolites between UZM-35 and MCM-68 was clarified by the spectroscopic approaches combined with the catalytic activity.

  42. Highly thermostable high molecular-weight low k PIM polymers based on 5,5′,6,6′-tetrahydroxy-3,3,3′,3′-Tetramethylspirobisindane, decafluorobiphenyl, and bisphenols Peer-reviewed

    Yu Konno, Ryota Osuga, Junko N. Kondo, Rongbin Ye, Tadashi Tsukamoto, Yoshiyuki Oishi, Yuji Shibasaki

    Polymer　230　124072-124072　2021/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.polymer.2021.124072 　

    ISSN： 0032-3861

  43. Synthesis of novel aluminoborosilicate isomorphous to zeolite TUN and its acidic and catalytic properties Peer-reviewed

    Feiyu Qin, Yong Wang, Yao Lu, Ryota Osuga, Hermann Gies, Junko N. Kondo, Toshiyuki Yokoi

    Microporous and Mesoporous Materials　323　111237-111237　2021/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.micromeso.2021.111237 　

    ISSN： 1387-1811

  44. Mechanochemical Route for Preparation of MFI-Type Zeolites Containing Highly Dispersed and Small Ce Species and Catalytic Application to Low-Temperature Oxidative Coupling of Methane Peer-reviewed

    Mizuho Yabushita, Motohiro Yoshida, Ryota Osuga, Fumiya Muto, Shoji Iguchi, Shuhei Yasuda, Atsushi Neya, Mami Horie, Sachiko Maki, Kiyoshi Kanie, Ichiro Yamanaka, Toshiyuki Yokoi, Atsushi Muramatsu

    Industrial & Engineering Chemistry Research　60　(28)　10101-10111　2021/07/21

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.iecr.1c01664 　

    ISSN： 0888-5885

    eISSN： 1520-5045

  45. Oxidative Reforming of Methane over Rh-Containing Zeolites: Active Species and Role of Zeolite Framework Peer-reviewed

    Ryota Osuga, Shuhei Yasuda, Masato Sawada, Ryo Manabe, Hisashi Shima, Susumu Tsutsuminai, Atsushi Fukuoka, Hirokazu Kobayashi, Atsushi Muramatsu, Toshiyuki Yokoi

    Industrial & Engineering Chemistry Research　60　(24)　8696-8704　2021/06/23

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.iecr.1c01353 　

    ISSN： 0888-5885

    eISSN： 1520-5045

  46. Controlling hydrocarbon oligomerization in phosphorus-modified CHA zeolite for a long-lived methanol-to-olefin catalyst Peer-reviewed

    Nao Tsunoji, Ryota Osuga, Masumi Yasumoto, Toshiyuki Yokoi

    Applied Catalysis A: General　620　118176-118176　2021/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.apcata.2021.118176 　

    ISSN： 0926-860X

  47. Construction of Fe2O3 loaded and mesopore confined thin-layer titania catalyst for efficient NH3-SCR of NOx with enhanced H2O/SO2 tolerance Peer-reviewed

    Kai Guo, Jiawei Ji, Ryota Osuga, Yuxiang Zhu, Jingfang Sun, Changjin Tang, Junko N. Kondo, Lin Dong

    Applied Catalysis B: Environmental　287　119982-119982　2021/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.apcatb.2021.119982 　

    ISSN： 0926-3373

  48. Organic Structure-Directing Agent-Free Synthesis of Mordenite-Type Zeolites Driven by Al-Rich Amorphous Aluminosilicates Peer-reviewed

    Ting Xiao, Mizuho Yabushita, Toshiki Nishitoba, Ryota Osuga, Motohiro Yoshida, Masaki Matsubara, Sachiko Maki, Kiyoshi Kanie, Toshiyuki Yokoi, Wenbin Cao, Atsushi Muramatsu

    ACS Omega　6　(8)　5176-5182　2021/03/02

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acsomega.0c05059 　

    ISSN： 2470-1343

    eISSN： 2470-1343

  49. Methanol‐to‐Olefins Reaction over Large‐Pore Zeolites: Impact of Pore Structure on Catalytic Performance Peer-reviewed

    Sungsik Park, Gakuji Sato, Ryota Osuga, Yong Wang, Yoshihiro Kubota, Junko N. Kondo, Hermann Gies, Takashi Tatsumi, Toshiyuki Yokoi

    Chemie Ingenieur Technik　93　(6)　990-1000　2021/03

    DOI： 10.1002/cite.202000174 　

    ISSN： 0009-286X

    eISSN： 1522-2640

  50. Characterization of H4SiW12O40 supported on mesoporous silica (SBA-15), non-structured amorphous silica and γ-alumina Peer-reviewed

    Kiria Kojima, Ryota Osuga, Shuhei Yasuda, Toshiyuki Yokoi, Yasuhiro Hosogi, Shintaro Itagaki, Yoshikuni Okumura, Junko N. Kondo

    Journal of Catalysis　395　387-398　2021/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.jcat.2021.01.011 　

    ISSN： 0021-9517

    eISSN： 1090-2694

  51. Synthesis of NaNbO3 under non-hydrothermal conditions from sodium niobate precursors prepared by alkaline treatment of amorphous Nb2O5 Peer-reviewed

    Ryota Osuga, Yuki Hiyoshi, Toshiyuki Yokoi, Junko N. Kondo

    Journal of Solid State Chemistry　295　121891-121891　2021/03

    DOI： 10.1016/j.jssc.2020.121891 　

    ISSN： 0022-4596

    eISSN： 1095-726X

  52. Mechanochemical Approach to Preparation of MFI Zeolites Substituted Isomorphously by Both Al and Fe as Durable Catalysts for the Dimethyl Ether to Olefin Reaction Peer-reviewed

    Mizuho Yabushita, Hiroki Kobayashi, Ryota Osuga, Masafumi Nakaya, Masaki Matsubara, Sachiko Maki, Kiyoshi Kanie, Atsushi Muramatsu

    Industrial & Engineering Chemistry Research　60　(5)　2079-2088　2021/02/10

    DOI： 10.1021/acs.iecr.0c05386 　

    ISSN： 0888-5885

    eISSN： 1520-5045

  53. One-pot synthesis of highly active Fe-containing MWW zeolite catalyst: Elucidation of Fe species and its impact on catalytic performance Peer-reviewed

    Peipei Xiao, Yong Wang, Ryota Osuga, Junko N. Kondo, Toshiyuki Yokoi

    Advanced Powder Technology　32　(4)　1070-1080　2021/02

    DOI： 10.1016/j.apt.2021.02.014 　

    ISSN： 0921-8831

    eISSN： 1568-5527

  54. Transcription-induced formation of paired Al sites in high-silica CHA-type zeolite framework using Al-rich amorphous aluminosilicate Peer-reviewed

    Mizuho Yabushita, Yoshiyasu Imanishi, Ting Xiao, Ryota Osuga, Toshiki Nishitoba, Sachiko Maki, Kiyoshi Kanie, Wenbin Cao, Toshiyuki Yokoi, Atsushi Muramatsu

    Chemical Communications　57　(98)　13301-13304　2021

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d1cc05401e 　

    ISSN： 1359-7345

    eISSN： 1364-548X

  55. Control of location and distribution of heteroatoms substituted isomorphously in framework of zeolites and zeotype materials Invited Peer-reviewed

    Mizuho Yabushita, Ryota Osuga, Atsushi Muramatsu

    CrystEngComm　23　(36)　6226-6233　2021

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d1ce00912e 　

    eISSN： 1466-8033

  56. Fabrication of AEI-type aluminosilicate catalyst with sheet-like morphology for direct conversion of propene to butenes Peer-reviewed

    Ryota Osuga, Takashi Takeuchi, Masato Sawada, Yusuke Kunitake, Takeshi Matsumoto, Shuhei Yasuda, Hiroaki Onozuka, Susumu Tsutsuminai, Junko N. Kondo, Hermann Gies, Toshiyuki Yokoi

    Catalysis Science & Technology　11　(17)　5839-5848　2021

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d1cy00854d 　

    ISSN： 2044-4753

    eISSN： 2044-4761

  57. Ethanol–ethylene conversion mechanism on hydrogen boride sheets probed by in situ infrared absorption spectroscopy Invited Peer-reviewed

    Asahi Fujino, Shin-ichi Ito, Taiga Goto, Ryota Ishibiki, Ryota Osuga, Junko N. Kondo, Tadahiro Fujitani, Junji Nakamura, Hideo Hosono, Takahiro Kondo

    Physical Chemistry Chemical Physics　23　(13)　7724-7734　2021

    DOI： 10.1039/d0cp03079a 　

    ISSN： 1463-9076

    eISSN： 1463-9084

  58. In-situ far-infrared study of vibrations between zeolite frameworks and metallic or molecular cations Peer-reviewed

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    MICROPOROUS AND MESOPOROUS MATERIALS　305　2020/10

    DOI： 10.1016/j.micromeso.2020.110345 　

    ISSN： 1387-1811

    eISSN： 1873-3093

  59. Bimetallic Fe-Cu/beta zeolite catalysts for direct hydroxylation of benzene to phenol: effect of the sequence of ion exchange for Fe and Cu cations Peer-reviewed

    Peipei Xiao, Ryota Osuga, Yong Wang, Junko N. Kondo, Toshiyuki Yokoi

    CATALYSIS SCIENCE & TECHNOLOGY　10　(20)　6977-6986　2020/10

    DOI： 10.1039/d0cy01216e 　

    ISSN： 2044-4753

    eISSN： 2044-4761

  60. Ultrafast Encapsulation of Metal Nanoclusters into MFI Zeolite in the Course of Its Crystallization: Catalytic Application for Propane Dehydrogenation Invited Peer-reviewed

    Jie Zhu, Ryota Osuga, Ryo Ishikawa, Naoya Shibata, Yuichi Ikuhara, Junko N. Kondo, Masaru Ogura, Jihong Yu, Toru Wakihara, Zhendong Liu, Tatsuya Okubo

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　59　(44)　19669-19674　2020/10

    DOI： 10.1002/anie.202007044 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  61. Zeolite-supported ultra-small nickel as catalyst for selective oxidation of methane to syngas Peer-reviewed

    Shuhei Yasuda, Ryota Osuga, Yusuke Kunitake, Kazuya Kato, Atsushi Fukuoka, Hirokazu Kobayashi, Min Gao, Jun-ya Hasegawa, Ryo Manabe, Hisashi Shima, Susumu Tsutsuminai, Toshiyuki Yokoi

    COMMUNICATIONS CHEMISTRY　3　(1)　2020/09

    DOI： 10.1038/s42004-020-00375-0 　

    ISSN： 2399-3669

  62. Metal cation-exchanged zeolites with the location, state, and size of metal species controlled Peer-reviewed

    Ryota Osuga, Saikhantsetseg Bayarsaikhan, Shuhei Yasuda, Ryo Manabe, Hisashi Shima, Susumu Tsutsuminai, Atsushi Fukuoka, Hirokazu Kobayashi, Toshiyuki Yokoi

    CHEMICAL COMMUNICATIONS　56　(44)　5913-5916　2020/06

    DOI： 10.1039/d0cc02284e 　

    ISSN： 1359-7345

    eISSN： 1364-548X

  63. Chemoselective Epoxidation of Allyloxybenzene by Hydrogen Peroxide Over MFI-Type Titanosilicate Peer-reviewed

    Yoshihiro Kon, Takuya Nakashima, Dachao Hong, Xinyi Ji, Ryota Osuga, Satoru Ito, Tadahiro Fujitani, Kazuhiko Sato, Toshiyuki Yokoi

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY　2020　(15)　2260-2263　2020/04

    DOI： 10.1002/ejoc.202000249 　

    ISSN： 1434-193X

    eISSN： 1099-0690

  64. Extremely Stable Zeolites Developed via Designed Liquid-Mediated Treatment Peer-reviewed

    Kenta Iyoki, Kakeru Kikumasa, Takako Onishi, Yasuo Yonezawa, Anand Chokkalingam, Yutaka Yanaba, Taiji Matsumoto, Ryota Osuga, Shanmugam P. Elangovan, Junko N. Kondo, Akira Endo, Tatsuya Okubo, Toru Wakihara

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　142　(8)　3931-3938　2020/02

    DOI： 10.1021/jacs.9b12709 　

    ISSN： 0002-7863

    eISSN： 1520-5126

  65. Hydroconversion of methyl laurate over beta-zeolite-supported Ni–Mo catalysts: Effect of acid and base treatments of beta zeolite Peer-reviewed

    Hiroyuki Imai, Miku Abe, Kazusa Terasaka, Hiroshi Yamazaki, Ryota Osuga, Junko N. Kondo, Toshiyuki Yokoi

    Fuel Processing Technology　197　106182-106182　2020/01

    DOI： 10.1016/j.fuproc.2019.106182 　

    ISSN： 0378-3820

    eISSN： 1873-7188

  66. IR observation of activated ether species on acidic OH groups on H-ZSM-5 zeolites Invited Peer-reviewed

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    Molecular Catalysis　477　110535-110535　2019/10

    DOI： 10.1016/j.mcat.2019.110535 　

    ISSN： 2468-8231

  67. Reaction-probe infrared investigation on drastic change in reactivity of mesoporous silica for acetalization of cyclohexanone with methanol; pore-size dependence Peer-reviewed

    Ryota Osuga, Yuki Hiyoshi, Toshiyuki Yokoi, Junko N. Kondo

    MICROPOROUS AND MESOPOROUS MATERIALS　278　91-98　2019/04

    DOI： 10.1016/j.micromeso.2018.11.027 　

    ISSN： 1387-1811

    eISSN： 1873-3093

  68. Cs-Beta with an Al-rich composition as a highly active base catalyst for Knoevenagel condensation Peer-reviewed

    Ryoichi Otomo, Ryota Osuga, Junko N. Kondo, Yuichi Kamiya, Toshiyuki Yokoi

    APPLIED CATALYSIS A-GENERAL　575　20-24　2019/04

    DOI： 10.1016/j.apcata.2019.02.014 　

    ISSN： 0926-860X

    eISSN： 1873-3875

  69. Probing the basicity of lattice oxygen on H-form zeolites using CO2 Peer-reviewed

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    JOURNAL OF CATALYSIS　371　291-297　2019/03

    DOI： 10.1016/j.jcat.2019.02.003 　

    ISSN： 0021-9517

    eISSN： 1090-2694

  70. Confinement of poly(allylamine) in Preyssler-type polyoxometalate and potassium ion framework for enhanced proton conductivity Peer-reviewed

    Tsukasa Iwano, Satoru Miyazawa, Ryota Osuga, Junko N. Kondo, Kayako Honjo, Takashi Kitao, Takashi Uemura, Sayaka Uchida

    Communications Chemistry　2　(1)　2019/01/25

    DOI： 10.1038/s42004-019-0111-x 　

    ISSN： 2399-3669

    eISSN： 2399-3669

  71. Effect of the ammonium ion on proton conduction in porous ionic crystals based on Keggin-type silicododecatungstate Invited Peer-reviewed

    Satoru Miyazawa, Reina Hosono, Ryota Osuga, Junko Nomura Kondo, Sayaka Uchida

    Acta Crystallographica Section C Structural Chemistry　74　(11)　1289-1294　2018/10/17

    DOI： 10.1107/s2053229618008227 　

    ISSN： 2053-2296

  72. Enhanced hydrogen chemisorption and spillover on non-metallic nickel subnanoclusters Peer-reviewed

    Hirotomo Nishihara, Fumihide Ohtake, Alberto Castro-Muniz, Hiroyuki Itoi, Masashi Ito, Yuuichiroh Hayasaka, Jun Maruyama, Junko N. Kondo, Ryota Osuga, Takashi Kyotani

    JOURNAL OF MATERIALS CHEMISTRY A　6　(26)　12523-12531　2018/07

    DOI： 10.1039/c8ta02561d 　

    ISSN： 2050-7488

    eISSN： 2050-7496

  73. Highly pH-dependent Facile-preparation of Amorphous High Surface Area Aluminum Hydroxide-bicarbonates with [epsilon-Al13O4(OH)(24)(H2O)(12)](7+) Peer-reviewed

    Yuki Kinoshita, Ryota Osuga, Junko N. Kondo, Yoshiyuki Ogasawara, Sayaka Uchida

    CHEMISTRY LETTERS　47　(5)　668-670　2018/05

    DOI： 10.1246/cl.180103 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  74. Thin (single-triple) niobium oxide layers on mesoporous silica substrate Peer-reviewed

    Junko N. Kondo, Yuki Hiyoshi, Ryota Osuga, Asako Ishikawa, Yu-Hsiang Wang, Toshiyuki Yokoi

    MICROPOROUS AND MESOPOROUS MATERIALS　262　191-198　2018/05

    DOI： 10.1016/j.micromeso.2017.11.032 　

    ISSN： 1387-1811

    eISSN： 1873-3093

  75. Crystallization of Ti-Rich *BEA Zeolites by the Combined Strategy of Using Ti-Si Mixed Oxide Composites and Intentional Aluminum Addition/Post-Synthesis Dealumination Peer-reviewed

    Hirofumi Horikawa, Takayuki Iida, Ryota Osuga, Koji Ohara, Junko N. Kondo, Toru Wakihara

    CRYSTAL GROWTH & DESIGN　18　(4)　2180-2188　2018/04

    DOI： 10.1021/acs.cgd.7b01621 　

    ISSN： 1528-7483

    eISSN： 1528-7505

  76. Highly efficient transformation of linear poly(phenylene ethynylene)s into zigzag-shaped pi-conjugated microporous polymers through boron-mediated alkyne benzannulation Peer-reviewed

    Yoshiaki Shoji, Minsu Hwang, Haruka Sugiyama, Fumitaka Ishiwari, Kumiko Takenouchi, Ryota Osuga, Junko N. Kondo, Shigenori Fujikawa, Takanori Fukushima

    MATERIALS CHEMISTRY FRONTIERS　2　(4)　807-814　2018/04

    DOI： 10.1039/c7qm00582b 　

    eISSN： 2052-1537

  77. Determination of Acid Site Location in Dealuminated MCM-68 by 27Al MQMAS NMR and FT-IR Spectroscopy with Probe Molecules Peer-reviewed

    Ryoichi Otomo, Toshiki Nishitoba, Ryota Osuga, Yusuke Kunitake, Yuichi Kamiya, Takashi Tatsumi, Toshiyuki Yokoi

    Journal of Physical Chemistry C　122　(2)　1180-1191　2018/01/18

    Publisher: American Chemical Society

    DOI： 10.1021/acs.jpcc.7b09576 　

    ISSN： 1932-7455 1932-7447

  78. Consideration of Acid Strength of a Single OH Group on Zeolites by Isotope Exchange Reaction with Ethane at High Temperatures Invited Peer-reviewed

    Takafumi Kubota, Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    TOPICS IN CATALYSIS　60　(19-20)　1496-1505　2017/12

    DOI： 10.1007/s11244-017-0834-9 　

    ISSN： 1022-5528

    eISSN： 1572-9028

  79. Infrared Investigation of Dynamic Behavior of Bronsted Acid Sites on Zeolites at High Temperatures Peer-reviewed

    Ryota Osuga, Toshiyuki Yokoi, Kazuki Doitomi, Hajime Hirao, Junko N. Kondo

    JOURNAL OF PHYSICAL CHEMISTRY C　121　(45)　25411-25420　2017/11

    DOI： 10.1021/acs.jpcc.7b09846 　

    ISSN： 1932-7447

  80. Proton conduction in alkali metal ion-exchanged porous ionic crystals Peer-reviewed

    Sayaka Uchida, Reina Hosono, Ryo Eguchi, Ryosuke Kawahara, Ryota Osuga, Junko N. Kondo, Mitsuhiro Hibino, Noritaka Mizuno

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS　19　(43)　29077-29083　2017/11

    DOI： 10.1039/c7cp04619g 　

    ISSN： 1463-9076

    eISSN： 1463-9084

  81. Rigid-to-Flexible Conformational Transformation: An Efficient Route to Ring-Opening of a Troger's Base-Containing Ladder Polymer Peer-reviewed

    Fumitaka Ishiwari, Nobuhiko Takeuchi, Takahiro Sato, Hiroshi Yamazaki, Ryota Osuga, Junko N. Kondo, Takanori Fukushima

    ACS MACRO LETTERS　6　(7)　775-780　2017/07

    DOI： 10.1021/acsmacrolett.7b00385 　

    ISSN： 2161-1653

  82. Synergetic effect in heterogeneous acid catalysis by a porous ionic crystal based on Al(III)-salphen and polyoxometalate Peer-reviewed

    Ryosuke Kawahara, Ryota Osuga, Junko N. Kondo, Noritaka Mizuno, Sayaka Uchida

    DALTON TRANSACTIONS　46　(10)　2017/03

    DOI： 10.1039/c6dt04552a 　

    ISSN： 1477-9226

    eISSN： 1477-9234

  83. Hydrothermal Stability of One-Dimensional Pore ZSM-22 Zeolite in Hot Water Peer-reviewed

    Anas K. Jamil, Oki Muraza, Ryota Osuga, Emad N. Shafei, Ki-Hyouk Choi, Zain H. Yamani, Ali Somali, Toshiyuki Yokoi

    JOURNAL OF PHYSICAL CHEMISTRY C　120　(40)　22918-22926　2016/10

    DOI： 10.1021/acs.jpcc.6b04980 　

    ISSN： 1932-7447

  84. Monolayer Tantalum Oxide on Mesoporous Silica Substrate Peer-reviewed

    Junko N. Kondo, Hiroshi Yamazaki, Asako Ishikawa, Ryota Osuga, Sho Takao, Toshiyuki Yokoi, Soichi Kikkawa, Kentaro Teramura, Tsunehiro Tanaka

    CHEMISTRYSELECT　1　(12)　3124-3131　2016/08

    DOI： 10.1002/slct.201600507 　

    ISSN： 2365-6549

  85. Mechanism of Decomposition of Surface Ethoxy Species to Ethene and Acidic OH Groups on H-ZSM-5 Peer-reviewed

    Junko N. Kondo, Hiroshi Yamazaki, Ryota Osuga, Toshiyuki Yokoi, Takashi Tatsumi

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS　6　(12)　2243-2246　2015/06

    DOI： 10.1021/acs.jpclett.5b00846 　

    ISSN： 1948-7185

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Misc. 10

  1. 草木から創るプラスチック原料-固体触媒によるバイオマス由来フラン化合物の官能基変換- Invited

    大須賀 遼太, 中島 清隆

    化学　79　(10)　72-73　2024/09

  2. 分光法を駆使した固体触媒研究 Invited

    大須賀 遼太

    触媒　65　205　2023

  3. メカノケミカル法を用いたFe置換MWW型ゼオライトの合成 Invited

    大須賀 遼太, 藪下 瑞帆, 村松 淳司

    ペトロテック　46　(10)　21-25　2023

  4. 金属酸化物表面の超秩序構造を利用した触媒反応：再生可能炭素資源の利活用 Invited

    大須賀 遼太, 中島 清隆

    セラミックス　58　531-534　2023

  5. Development of Rh-containing Zeolite Catalysts with the Location, State, and Size of Metal Species Controlled

    Ryota Osuga

    Catalysts and Catalysis　64　(5)　308-312　2022/10

  6. Synthesis of Various Crystalline Metallosilicates by Mechanochemical Method and Their Catalytic Applications Invited

    Ryota Osuga, Mizuho Yabushita, Atsushi Muramatsu

    Catalysts & Catalysis　63　190-196　2021

  7. Developments of Metal Oxide-Supported Mesoporous Silica and Applications to UV Protection Agents

    Kohei Iwanaga, Sachio Asano, Fumiaki Yoshitomi, Ryota Osuga, Junko N. Kondo

    62　37-41　2018

  8. FTIRと閉鎖循環系を組み合わせた触媒観察 Invited

    大須賀 遼太, 野村淳子

    FTIR TALK LETTER　31　2-5　2018

  9. IR study of dynamic behavior of Brønsted acid sites on zeolites at high temperatures Invited

    35　101-108　2018

  10. IRを利用した固体酸触媒の反応機構解析 Invited

    大須賀 遼太, 野村 淳子

    触媒　60　14-20　2018

Show all ︎Show first 5

Books and Other Publications 2

  1. メタンと二酸化炭素 ～その触媒的化学変換技術の現状と展望～

    村松 淳司, 大須賀 遼太, 藪下 瑞帆

    シーエムシー・リサーチ　2023/03

    ISBN: 9784910581361

  2. Crystalline Metal Oxide Catalysts: Chapter 6, Position Control of Catalytic Elements in Zeolites

    Ryota Osuag, Toshiyuki Yokoi

    Springer Singapore　2022/10

    ISBN: 9789811950131

Presentations 77

  1. Zeolite Catalysis for Bio-Based Phenol Production from Hydrogenated Cardanol Invited

    Ryota Osuga

    TOCAT10 Pre-Symposium in Sendai Theoretical Spectroscopy Meets NanoTerasu: Advancing Functional Materials　2026/08/17

  2. Heterogeneous Catalysis for Retro-Aldolization of Glucose: High-Yielding Synthesis of C4- and C2 Derived Carbohydrates by in-situ Acetalization Using Zeolite as a Co-Catalyst Invited

    Ryota Osuga

    Tohoku University & Ewha Womans University Joint Symposium　2026/07/27

  3. バイオマス転換反応を志向した固体触媒の開発と放射光計測を用いたキャラクタリゼーション Invited

    大須賀遼太

    第3回 先端放射光活用研究会「放射光が拓く触媒科学の発展」　2026/01/19

  4. Efficient Retro-aldolization of Glucose by Catalytic In-situ Acetalization Strategy

    Ryota Osuga, Navya Subray Bhat, Quan Shi, Mizuho Yabushita, Satoshi Suganuma, Emiel J. M. Hensen, Kiyotaka Nakajima

    The International Chemical Congress of Pacific Basin Societies 2025　2025/12/16

  5. In-situ IR測定による固体触媒のキャラクタリゼーション Invited

    大須賀遼太

    日本分光学会 赤外ラマン分光部会 赤外ラマンセミナー｢振動分光学の研究最前線｣　2025/11/28

  6. ゼオライト触媒を用いた炭素資源変換：非在来型および再生可能炭素資源の利活用 Invited

    大須賀遼太

    2025年度 触媒学会北海道支部 苫小牧講演会　2025/11/06

  7. 赤外分光を用いた溶媒中の固体触媒の酸性質評価

    大須賀遼太, 石泉, 菅沼学史, 中島清隆

    第55回石油・石油化学討論会　2025/10/30

  8. Bio-Based phenol from cashew nutshells by catalytic hydrocardanol trans-Alkylation using zeolites

    Ryota Osuga, Jan J. Wiesfeld, Keisuke Iriba, Satoshi Suganuma, Emiel J. M. Hensen, Kiyotaka Nakajima

    NUS-ICAT Joint International Symposium: Advanced Catalytic Technology for a Sustainable Future　2025/10/27

  9. Bio-based phenol synthesis from hydrocardanol using zeolite catalysts Invited

    Ryota Osuga

    NUS-ICAT Joint International Symposium: Advanced Catalytic Technology for a Sustainable Future　2025/10/28

  10. 固体酸触媒による糖類の逆アルドール反応を基軸とした基幹化学品の合成 Invited

    大須賀 遼太

    第136回触媒討論会　2025/09/17

  11. 赤外分光法を用いた固体触媒のキャラクタリゼーション Invited

    大須賀 遼太

    第35回キャラクタリゼーション講習会　2025/06/27

  12. 結晶性複合酸化物触媒を用いたグルコースの逆アルドール反応

    大須賀 遼太, 石 泉, 菅沼 学史, 加藤 英樹, 中島 清隆

    石油学会 第67回年会（第73回研究発表会）　2025/05/27

  13. Catalytic in-situ acetalization strategy for retro-aldolization of glucose

    2025/05/21

  14. ゼオライト触媒によるin-situアセタール保護に基づくグルコースの逆アルドール反応生成物の高収率化

    大須賀 遼太, Navya Subray Bhat, 石 泉, 藪下 瑞帆, 菅沼 学史, Emiel J. M. Hensen, 中島 清隆

    第135回触媒討論会　2025/03/19

  15. ゼオライトを用いたグルコースの逆アルドール反応生成物のin-situアセタール保護

    大須賀 遼太, Navya Subray Bhat, 石 泉, 藪下 瑞帆, 菅沼 学史, Emiel J.M. Hense, 中島 清隆

    吸着-ゼオライト合同研究発表会　2024/12/01

  16. キシロースの脱水反応における準安定なニオブ酸化物の触媒作用

    大須賀 遼太, 袁 俣曈, 菅沼 学史, 加藤 英樹, 中島 清隆

    第54回石油・石油化学討論会　2024/11/29

  17. Heterogeneous catalysis for the synthesis of C4 and C2 carbohydrates via retro-aldolization of glucose and subsequent in-situ acetalization

    Ryota Osuga, Navya Subray Bhat, Shi Quan, Mizuho Yabushita, Satoshi Suganuma, Emiel J.M. Hensen, Kiyotaka Nakajima

    FHI-ICAT Joint Symposium 2024　2024/11/18

  18. 固体触媒を用いた反応場分離に基づくバイオマス由来糖類の逆アルドール反応の高効率化 Invited

    大須賀 遼太

    第62回オーロラセミナー　2024/10/25

  19. 反応場を分離したアセタール保護に基づくグルコースの逆アルドール反応生成物の高収率化

    大須賀 遼太, Navya Subray Bhat, 石 泉, 藪下 瑞帆, 菅沼 学史, Emiel J. M. Hensen, 中島 清隆

    第134回触媒討論会　2024/09/20

  20. Highly efficient retro-aldolization of glucose to C4 and C2 carbohydrates enabled by in-situ acetalization of their formyl groups

    Ryota Osuga, Navya Subray Bha, Shi Quan, Mizuho Yabushita, Satoshi Suganuma, Emiel J. M. Hensen, Kiyotaka Nakajima

    The 18th International Congress of Catalysis　2024/07/18

  21. In-situ 赤外分光法を駆使した固体触媒表面の活性点構造解析 Invited

    大須賀 遼太

    第8回フロンティア触媒設計セミナー　2023/12

  22. メカノケミカル法を用いたFe置換MWW型ゼオライトの合成

    大須賀 遼太, 田中 銀平, 藪下 瑞帆, 二宮 翔, 真木 祥千子, 西堀 麻衣子, 蟹江 澄志, 村松 淳司

    石油学会 第65回年会・第71回研究発表会　2023/05

  23. Fluoride-Free Synthesis of High-Silica CHA-Type Zeolites and Its Catalytic Application for the MTO Reaction

    Ryota Osuga, Mizuho Yabushita, Takeshi Matsumoto, Masato Sawada, Toshiyuki Yokoi, Kiyoshi Kanie, Atsushi Muramatsu

    The 19th Korea-Japan Symposium on Catalysis　2023/05

  24. 金属含有ゼオライト触媒を用いたアンモニア分解反応

    大須賀 遼太, 李 懿軒, 蟹江 澄志, 村松 淳司

    第22回多元研研究発表会　2022/12

  25. フッ素を用いないハイシリカCHA型アルミノシリケートの合成とMTO反応活性評価

    大須賀 遼太, 藪下 瑞帆, 松本 剛, 澤田 真人, 蟹江 澄志, 横井 俊之, 村松 淳司

    第38回ゼオライト研究発表会　2022/12

  26. 赤外分光法を用いたゼオライトの触媒特性評価 Invited

    大須賀 遼太

    第6回ゼオライトセミナー/GSCセミナー　2022/12

  27. Catalytic decomposition of ammonia over metal-containing zeolites Invited

    Ryota Osuga

    2022/11

  28. Ce含有MFI型ゼオライト担持金属触媒を用いた低温メタン酸化カップリング反応

    大須賀 遼太, 根谷 温, 芳田 元洋, 藪下 瑞帆, 保田 修平, 真木 祥千子, 蟹江 澄志, 横井 俊之, 村松 淳司

    第52回石油・石油化学討論会　2022/10

  29. Synthesis of high-silica CHA-type aluminosilicates by the seed-assisted aging treatment without fluoride media Invited

    Ryota Osuga

    International Symposium on Porous Materials 2022　2022/10

  30. フッ素フリー条件下でのハイシリカCHA型ゼオライトの合成とMTO反応用触媒としての応用

    大須賀 遼太, 藪下 瑞帆, 松本 剛, 蟹江 澄志, 横井 俊之, 村松 淳司

    第130回触媒討論会　2022/09

  31. Creation of concerted active sites for improvement of catalytic performance of Ce-MFI-supported Pd catalysts in low-temperature methane oxidation

    Ryota Osuga, Atsushi Neya, Motohiro Yoshida, Mizuho Yabushita, Shuhei Yasuda, Sachiko Maki, Kiyoshi Kanie, Toshiyuki Yokoi, Atsushi Muramatsu

    ACS Fall Meeting 2022　2022/08

  32. Mechanochemical Synthesis of Fe-Substituted MWW-type Zeolites Catalysts

    Ryota OSUGA, Ginpei TANAKA, Mizuho YABUSHITA, Kakeru NINOMIYA, Sachiko MAKI, Maiko NISHIBORI, Kiyoshi KANIE, Atsushi MURAMATSU

    TOCAT9　2022/07

  33. 骨格内Al原子位置が制御されたRh含有ゼオライト触媒による酸化的メタン改質反応

    大須賀 遼太, 保田 修平, 松本 剛, 小林 広和, 福岡 淳, 村松 淳司, 横井 俊之

    第129回触媒討論会　2022/03

  34. 金属担持Ce含有ゼオライトを用いた低温メタン酸化カップリング反応

    大須賀 遼太, 藪下 瑞帆, 二宮 翔, 保田 修平, 真木 祥千子, 西堀 麻衣子, 蟹江 澄志, 横井 俊之, 村松 淳司

    第21回東北大学多元物質科学研究所研究発表会　2021/12/09

  35. ハイシリカなCHA型ゼオライトのフッ素フリー合成とMTO反応活性評価

    大須賀 遼太, 藪下 瑞帆, 松本 剛, 蟹江 澄志, 横井 俊之, 村松 淳司

    第37回ゼオライト研究発表会　2021/12/03

  36. Development of metal-containing zeolites for catalytic decomposition of ammonia Invited

    Ryota Osuga

    2021 ONLINE JOINT SYMPOSIUM TOHOKU UNIVERSITY and NATIONAL TAIPEI UNIVERSITY OF TECHNOLOGY　2021/11/30

  37. Ce含有ゼオライト担持金属触媒による低温メタン酸化カップリング反応

    大須賀 遼太, 芳田 元洋, 根谷 温, 保田 修平, 二宮 翔, 藪下 瑞帆, 真木 祥千子, 西堀 麻衣子, 蟹江 澄志, 横井 俊之, 村松 淳司

    第51回石油・石油化学討論会　2021/11/12

  38. Synthesis of zeolite catalysts with well-controlled location of catalytic active sites Invited

    Ryota Osuga

    The 5th Foresight Symposium on Organic/Inorganic Nanohybrid Platforms for Precision Tumor Imaging and Therapy　2021/10/14

  39. Characterization and application of zeolite catalysts Invited

    Ryota Osuga

    2020 ONLINE JOINT SYMPOSIUM Engineer a Better Tomorrow Institute of Multidisciplinary Research for Advance Material & College of Engineering　2020/11/30

  40. in-situ 赤外分光法を用いたアルミノシリケート型ゼオライトの触媒特性

    大須賀 遼太, 横井 俊之, 野村 淳子

    第36回ゼオライト研究発表会　2020/11

  41. Rh含有ゼオライト触媒を用いた酸化的メタン改質反応におけるゼオライト骨格の役割

    大須賀 遼太, Bayarsaikhan Saikhantsetseg, 保田 修平, 朴 成植, 真鍋 亮, 嶋 寿, 堤内 出, 福岡 淳, 小林 広和, 横井 俊之

    第50回石油・石油化学討論会　2020/11

  42. 骨格内Al原子分布に基づくRh含有MFI型ゼオライトの活性点制御

    大須賀 遼太, Bayarsaikhan Saikhantsetseg, 保田 修平, 真鍋 亮, 嶋 寿, 堤内 出, 福岡 淳, 小林 広和, 横井 俊之

    第126回触媒討論会　2020/09

  43. 赤外分光法を用いたゼオライト上の活性化エーテル種に関する検討

    大須賀 遼太, 横井 俊之, 野村 淳子

    ゼオライト学会第35回研究発表会　2019/12

  44. 赤外分光法を用いたメソポーラスシリカ細孔内の曲率表面に存在する活性点の観測

    大須賀 遼太, 横井 俊之, 野村 淳子

    石油学会第49回石油・石油化学討論会　2019/11

  45. In-situ far IRによるゼオライト上のカチオン振動および分子振動の観測

    大須賀 遼太, 横井 俊之, 野村 淳子

    第124回触媒討論会　2019/09

  46. Investigation of the cation vibration of zeolites for understanding the confinement effect by using in-situ far-IR system

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    The 8th Asia Pacific Congress on Catalysis　2019/08

  47. IR Observation of the Activated Diethyl Ether on Acidic OH Groups on H-ZSM-5

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    19th International Zeolite Conference　2019/07

  48. CO2をプローブ分子に用いたゼオライト格子酸素の塩基性評価

    大須賀 遼太, 横井 俊之, 野村 淳子

    第8回JACI/GSCシンポジウム　2019/06

  49. 遠赤外分光法によるゼオライト骨格上のカチオン振動の観測

    大須賀 遼太, 横井 俊之, 野村 淳子

    第24回 JPIJSポスターセッション　2019/05

  50. Far-IR observation of the cation vibration on various zeolites

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    17th Korea-Japan Symposium on Catalysis　2019/05

  51. CHARACTERIZATION OF BASICITY OF LATTICE OXYGEN ON PROTON-FORM ZEOLITES USING FT-IR WITH CO2 PROBE METHOD

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    The 4th Euro-Asia Zeolite conference　2019/01

  52. CO2をプローブ分子とした固体酸触媒の塩基性評価

    大須賀 遼太, 横井 俊之, 野村 淳子

    ゼオライト学会第34回研究発表会　2018/11

  53. Infrared investigation of dehydration of ethanol over zeolites

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    2018/10

  54. 赤外分光法を用いた高温でのゼオライト酸性水酸基の評価

    大須賀 遼太, 横井 俊之, 野村 淳子

    触媒学会第122回触媒討論会　2018/09

  55. NBO-4、NBO-5CへのCO吸着による酸性質評価

    大須賀 遼太, 野村 淳子

    触媒学会第37回参照触媒討論会　2018/09

  56. IR investigation of curvature effect of mesoporous silica for acetalization of cyclohexanone

    Ryota Osuga, Yuki Hiyoshi, Toshiyuki Yokoi, Junko N. Kondo

    Taiwan-Japan-US Joint Workshop on Energy Materials and Sustainable Development　2018/09

  57. Infrared Investigation of Dynamic Behavior of Brønsted Acid Sites on Zeolites at High Temperatures

    Ryota Osuga, Toshiyuki Yokoi, Kazuki Doitomi, Hajime Hirao, Junko N. Kondo

    International Symposium on Zeolites and Microporous Crystals (ZMPC) 2018　2018/08

  58. FT-IR Study of Characterization of Basicity of Lattice oxygen on Proton-form Zeolites using CO2 Probe Method

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    The 8th Tokyo Conference on Advanced Catalytic Science and Technology　2018/08

  59. Investigation of the basicity of lattice oxygens on H-form zeolites using FT-IR

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    International Symposium on Relations between Homogeneous and Heterogeneous Catalysis　2018/07

  60. 反応のIR観測をプローブとしたメソポーラスシリカ上のシラノール基の反応性評価

    大須賀 遼太, 日吉 優貴, 横井 俊之, 野村 淳子

    第7回JACI/GSCシンポジウム　2018/06

  61. Mechanism of ethanol dehydration via surface ethoxy intermediate over acidic sites on H‑ZSM‑5

    Ryota Osuga, Hiroshi Yamazaki, Toshiyuki Yokoi, Junko N. Kondo

    6th International Congress on Operando Spectroscopy　2018/04

  62. Elucidation of behavior of proton hopping on zeolites at high temperatures

    Ryota Osuga, Toshiyuki Yokoi, Kazuki Doitomi, Hajime Hirao, Junko N. Kondo

    International CLS Forum on Photo and Catalytic Science for Sustainable Society　2018/03

  63. プロトン型ゼオライトの格子塩基性と触媒反応との関わり

    大須賀 遼太, 横井 俊之, 野村 淳子

    ゼオライト学会第33回研究発表会　2017/12

  64. Far-IR study of low frequency modes on various zeolites

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    5th Ito International Research Center (IIRC), RIKEN, the Institute for Splid State Physics (ISSP, UNiversity of Tokyo) and Surface & Interface Spectroscopy 2017　2017/11

  65. IR法を用いた金属イオン交換ゼオライトのメタン活性化能の検討

    大須賀 遼太, 横井 俊之, 野村 淳子

    石油学会第47回石油・石油化学討論会　2017/11

  66. 分子状吸着CO2をプローブとしたゼオライト格子塩基の評価

    大須賀 遼太, 横井 俊之, 野村 淳子

    触媒学会第120回触媒討論会　2017/09

  67. FT-IR study of pore-size effect of mesoporous silica for cyclohexanone acetalization

    Ryota Osuga, Yuki Hiyoshi, Toshiyuki Yokoi, Junko N. Kondo

    13th European Congress on Catalysis　2017/08

  68. MCM-41上におけるシクロヘキサノンのアセタール化反応機構解明

    大須賀 遼太, 横井 俊之, 野村 淳子

    第22回 JPIJSポスターセッション　2017/05

  69. FT-IR study of behavior of acidic hydroxyl groups on zeolites at high temperatures

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    16th Korea-Japan Symposium on Catalysis & 3rd International Symposium of Institute for Catalysis　2017/05

  70. プロトン化中間体を経由した吸着種とゼオライト水酸基の同位体交換反応

    大須賀遼太, 横井俊之, 野村淳子

    触媒学会第119回触媒討論会　2017/03

  71. Characterization of acid strength of an isolated acidic OH group on zeolites by a reaction-probe IR method at high temperatures

    Ryota Osuga, Takahumi Kubota, Toshiyuki Yokoi, Junko N. Kondo

    The 3rd Euro-Asia Zeolite conference　2017/01

  72. アルカンの同位体交換反応を用いた高温におけるゼオライト酸性水酸基の直接観測

    大須賀遼太, 横井俊之, 野村淳子

    ゼオライト学会第32回研究発表会　2016/12

  73. 赤外分光法を用いた高温でのゼオライト酸性水酸基の評価

    大須賀 遼太, 横井 俊之, 野村 淳子

    触媒学会第118回触媒討論会　2016/09

  74. CO吸着によるALO-9、ALO-10の酸性質評価

    大須賀遼太, 野村淳子

    触媒学会第36回参照触媒討論会　2016/09

  75. CO吸着によるNBO-1、NBO-2の酸性質評価

    大須賀遼太, 野村淳子

    触媒学会第36回参照触媒討論会　2016/09

  76. Characterization of acidic OH groups of zeolites by FT-IR observation at high temperatures

    Ryota Osuga, Toshiyuki Yokoi, Junko N. Kondo

    The 16th International Congress on Catalysis　2016/07

  77. ゼオライト酸性水酸基の高温でのプロトン化に関する赤外分光法を用いた検討

    大須賀 遼太, 横井 俊之, 野村 淳子

    石油学会第59回年会(第65回研究発表会)　2016/05

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Industrial Property Rights 6

  1. 酸化物複合体

    野村 淳子, 大須賀 遼太

    特許6936461

    Property Type: Patent

  2. 2-アミノメチルテトラヒドロフラン-5-カルボン酸エステルの製造方法

    中島 清隆, 大須賀 遼太

    Property Type: Patent

  3. 芳香族化合物の製造方法、およびテレフタル酸の製造方法

    Property Type: Patent

  4. 環状ジオール化合物及びその製造方法、並びに糖類分解用触媒

    Property Type: Patent

  5. ＣＮＳＬを用いたフェノールの製造方法

    Property Type: Patent

  6. 金属酸化物多孔体、金属酸化物多孔体の製造方法

    野村 淳子, 大須賀 遼太, 阿部 能之

    特許7016119

    Property Type: Patent

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Research Projects 15

  1. 精密制御触媒で実現するCO2からのBTXワンパス合成

    国立大学東京大学,国立大学法人北海道大学,出光興産株式会社

    Offer Organization: NEDO

    System: 先導研究プログラム/新技術先導研究プログラム/エネルギー・環境新技術先導研究プログラム

    2025/05 - 2028/03

  2. 赤外分光法を駆使した液相固体酸塩基触媒反応ダイナミクスの解明

    大須賀遼太

    Offer Organization: 科学技術振興機構

    System: 戦略的創造研究推進事業

    Category: さきがけ

    2024/10 - 2028/03

  3. ゼオライト触媒によるハイブリッドバイオ燃料前駆体の合成

    大須賀 遼太, Saikat Dutta

    Offer Organization: 東北大学多元物質科学研究所

    System: 2026年度多元研プロジェクト 国際共同研究

    2026/05 - 2027/03

  4. 木質系バイオマス資源から低級炭化水素への触媒的化学変換

    大須賀遼太

    Offer Organization: 独立行政法人環境再生保全機構

    System: 環境研究総合推進費

    Category: 革新型研究開発（若手枠B）

    2024/04 - 2027/03

  5. 固体触媒によるバイオマス由来糖類のC-C結合切断を基軸とした化成品合成

    大須賀遼太

    Offer Organization: 北海道大学（第一三共株式会社）

    System: 2024年「創成はばたく次世代研究助成事業」

    2024/07 - 2026/03

  6. Operando IR測定による液相固体触媒反応のダイナミクス解析

    大須賀 遼太

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究

    Institution: 北海道大学

    2024/04 - 2026/03

  7. 革新的固体触媒技術によるパーム残渣物の利活用

    横井俊之, 中島清隆, 大須賀遼太, チャワリット・ナグムチャルシリビチャイ, マローン・コナート

    Offer Organization: 科学技術振興機構

    System: e-ASIA 共同研究プログラム 代替エネルギー分野

    2023/04 - 2026/03

  8. 固体触媒を用いたバイオマス由来糖類の変換反応におけるその場IR観察

    大須賀遼太, 松本剛

    Offer Organization: 北海道大学創成研究機構研究人材育成推進室

    System: 令和6年度「次世代研究者リーダー育成共同研究助成」

    2024/07 - 2025/03

  9. バイオマス由来糖類の利用拡大を志向した新規固体触媒プロセスの開発

    大須賀遼太

    Offer Organization: ENEOS東燃ゼネラル研究奨励・奨学会

    System: 第43回ENEOS東燃ゼネラル研究奨励・奨学会 研究助成

    2024/04 - 2025/03

  10. 液相バイオマス変換反応のoperando IR計測による反応活性因子の定量的理解

    大須賀 遼太, 松本 剛

    Offer Organization: 北海道大学創成研究機構研究人材育成推進室

    System: 令和5年度「次世代研究者リーダー育成共同研究助成」

    2023/07 - 2024/03

  11. Synthesis procedure of well-defined zeolite and comprehensive understanding of detailed structure

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

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

    Institution: Tohoku University

    2021/07 - 2024/03

  12. 金属内包型ゼオライト触媒による高効率アンモニア分解プロセスの構築

    大須賀 遼太, Yi-Hsuan Lee

    Offer Organization: 東北大学多元物質科学研究所

    System: 2022年度多元研プロジェクト 国際共同研究

    2022/05 - 2023/03

  13. 分光学的アプローチを駆使したゼオライト触媒上の酸・塩基協奏型活性点の創出

    大須賀 遼太

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究

    Institution: 東北大学

    2021/04 - 2023/03

    More details Close

    研究開始当初は、Betaゼオライト合成時の原料にAlペアサイトを豊富に有するFAU型のゼオライトを用いることで、合成後のゼオライト骨格中にAlペアサイトを転写することを目指していた。しかしながら、目的のゼオライトの合成には至らなかったため、代替案として孤立Alサイトの選択的脱Alを試みた。前年度に行った検討で得られた結果から、Co2+イオンで骨格内Alペアサイトを保護した状態で脱Al処理を施すことで、通常の脱Al処理に比べて、孤立したAlサイトを選択的に脱Alできることが示唆された。一方で、硝酸を用いた脱Al処理では、Co2+からプロトンへのイオン交換が起こり、ペアサイトからの脱Alも併発することが問題であった。そこで本年度は、Co2+イオンおよび硝酸共存下での脱Al処理に取り組んだ。また、得られたゼオライトに対して、ICP、IR、UV-vis、NMR、XAFS測定などを用いたキャラクタリゼーションを行った。市販のBetaゼオライトに対して、様々なCo2+イオンおよび硝酸濃度下で脱Al処理を行った結果、Co2+イオン過剰かつ低濃度の硝酸存在下で処理することで、Co2+イオン非存在下に比べて、選択的に孤立Alサイトの脱Alが進行することを確認した。本手法の適用可能範囲の拡大を目指し、同様の処理を中細孔、小細孔ゼオライトにも応用したが、小細孔ゼオライトに関しては、脱Alの進行が確認されなかった。 得られた触媒をアルカリ金属でイオン交換し、酸性水酸基と格子酸素の酸・塩基ペアサイトの創出を試みた。また、アルドール縮合反応をモデル反応として、酸・塩基協奏作用が触媒活性に及ぼす影響を検討した。

  14. 金属窒化物内包型ゼオライト触媒の合成とアンモニア分解反応への応用

    大須賀 遼太, Yi-Hsuan Lee

    Offer Organization: 東北大学多元物質科学研究所

    System: 2021年度多元研プロジェクト 国際共同研究

    2021/05 - 2022/03

  15. Contol of catalytically active sites based on the framework Al atoms in metal-containing zeolites and its precise structure analysis

    Osuga Ryota

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Research Activity Start-up

    Institution: Tohoku University

    2020/09 - 2022/03

    More details Close

    Control of the location of catalytic active sites is one of the important factors to design an efficient solid catalyst. In this study, Rh ion-exchanged MFI-type aluminosilicate zeolites with different framework Al positions were prepared for controlling the location, state, and size of Rh species. The MFI-type aluminosilicate zeolite with the framework Al atoms predominantly located inside the channel intersections leads to the formation of Rh oxide clusters, which exhibited high catalytic activity for the oxidative reforming of methane. In addition, the structure of the active sites and the role of zeolite framework were discussed using the model catalysts.

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Media Coverage 3

  1. バイオマス由来糖類を効率よく分解する触媒反応を開発～バイオマス由来糖類の利用拡大に期待～

    北海道大学　北海道大学HP

    2026/01

    Type: Other

  2. 農業廃棄物から樹脂原料をつくる触媒反応を開発～ゼオライト触媒を用いたバイオフェノール合成経路の探索～

    北海道大学　北海道大学HP

    2025/07

    Type: Other

  3. 北大、カシューナッツ殻液からフェノール合成

    化学工業日報社　化学工業日報電子版

    2025/07

    Type: Internet