SEARCH

Search Details

SUZUKI　Takaaki
Material Science DivisionAssistant Professor
Department of Applied Chemistry

Researcher information

■ Degree
  • Mar. 2025
■ Field Of Study
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Catalytic processes and resource chemistry
■ Career
  • Apr. 2024 - Mar. 2025
■ Educational Background
  • Apr. 2020 - Mar. 2025
  • Apr. 2018 - Mar. 2020
  • Apr. 2016 - Mar. 2018
■ Member History
  • Mar. 2025 - Present
■ Award
  • Dec. 2024, 優秀ポスター発表賞 (第14回CSJ化学フェスタ)
  • Nov. 2022, 優秀講演賞 (第52回石油・石油化学討論会 インターナショナルセッション)
  • Aug. 2021, 優秀ポスター発表賞 (第41回触媒学会若手会 夏の研修会)

Performance information

■ Paper
  • Catalytic methane oxidation to methanol using supported Cu-introduced polyoxometalate cesium salt catalysts　　　　　　　　　　　　　　　
    Takaaki Suzuki; Tomohiro Yabe; Kosuke Suzuki; Kazuya Yamaguchi
    Chemistry Letters, Apr. 2025, [Reviewed], [Lead]
    Abstract
    Selective methane (CH4) oxidation to methanol (CH3OH) is a highly desirable reaction; however, it remains challenging due to the high stability of CH4 and the facile over-oxidation of the products. Recently, Cu-based catalysts have been reported as promising candidates for continuous CH3OH production from CH4. Here, we demonstrated that supported Cu-introduced polyoxometalate (POM) cesium salts catalytically produced CH3OH at 450°C. Notably, monocopper-introduced POM cesium salts (Cs-Cu1/SiO2) selectively produced CH3OH (>75%), maintaining a stable CH3OH yield over a 24 h time on stream. In contrast, CH3OH was prone to over-oxidation into carbon monooxide (CO) and carbon dioxide (CO2) over Cu(OAc)2/SiO2 or monocopper-introduced POM tetra-n-butylammonium salts (TBA-Cu1/SiO2), due to the aggregation of CuO species. Cu K-edge XANES and Raman spectroscopy revealed that the supported POM cesium salts functioned as molecular templates and potentially prevented the aggregation of Cu active sites.
    English, Scientific journal
    DOI：https://doi.org/10.1093/chemle/upaf077
    DOI ID：10.1093/chemle/upaf077, ISSN：0366-7022, ORCID：181795630
  • Role of polyoxometalate precursors and supports in the selective oxidation of methane into formaldehyde using supported metal oxide subnanocluster catalysts　　　　　　　　　　　　　　　
    Keiju Wachi; Tomohiro Yabe; Takaaki Suzuki; Kentaro Yonesato; Kosuke Suzuki; Kazuya Yamaguchi
    Catalysis Science & Technology, Jul. 2023, [Reviewed]
    By examining various metal-containing polyoxometalate (POM) precursors and supports, it was found that catalysts prepared using Fe-containing POM precursors supported on SiO2with a high specific surface area were effective for CH4oxidation.
    English, Scientific journal
    DOI：https://doi.org/10.1039/d3cy00750b
    DOI ID：10.1039/d3cy00750b, ISSN：2044-4753, ORCID：151631238
  • Creation of Highly Dispersed Supported Polyoxometalate Cesium Salts via Cation Exchange from Alkylammonium Salts on Supports　　　　　　　　　　　　　　　
    Takaaki Suzuki; Tomohiro Yabe; Keiju Wachi; Kentaro Yonesato; Kosuke Suzuki; Kazuya Yamaguchi
    ChemNanoMat, Feb. 2023, [Reviewed], [Lead]
    AbstractWe have reported several precisely designed metal‐oxo clusters on lacunary polyoxometalate (POM) tetra‐n‐butylammonium (TBA) salts in organic solvents. However, owing to their low thermostability and/or low effective surface area, POM TBA salts are not amenable to heterogeneous catalysts for gas‐phase reactions at high temperature. To avoid this problem, we developed a new preparation method that obtains highly dispersed supported‐POM Cs salts (Cs−POM/support) via cation exchange from the corresponding TBA salts on supports. In this study, a model Keggin‐type POM called TBA4PVMo11O40 (TBA−PVMo11) is supported on oxides (TBA−PVMo11/support) using an incipient wetness method in acetonitrile. This TBA−PVMo11/support was cation‐exchanged with cesium trifluoromethanesulfonate in ethanol to obtain supported‐POM Cs salts (Cs−PVMo11/support). Various characterizations revealed that the TBA−PVMo11/support maintained the original Keggin structure during cation exchange and that Cs−PVMo11 was highly dispersed on the supports. Furthermore, Cs−PVMo11/support maintained the Keggin structure even after calcination at 573 K under an aerobic condition.
    English, Scientific journal
    DOI：https://doi.org/10.1002/cnma.202200428
    DOI ID：10.1002/cnma.202200428, ISSN：2199-692X, ORCID：151631201
  • Front Cover: Creation of Highly Dispersed Supported Polyoxometalate Cesium Salts via Cation Exchange from Alkylammonium Salts on Supports (ChemNanoMat 2/2023)　　　　　　　　　　　　　　　
    Takaaki Suzuki; Tomohiro Yabe; Keiju Wachi; Kentaro Yonesato; Kosuke Suzuki; Kazuya Yamaguchi
    ChemNanoMat, Feb. 2023
    AbstractWe have reported several precisely designed metal‐oxo clusters on lacunary polyoxometalate (POM) tetra‐n‐butylammonium (TBA) salts in organic solvents. However, owing to their low thermostability and/or low effective surface area, POM TBA salts are not amenable to heterogeneous catalysts for gas‐phase reactions at high temperature. To avoid this problem, we developed a new preparation method that obtains highly dispersed supported‐POM Cs salts (Cs−POM/support) via cation exchange from the corresponding TBA salts on supports. In this study, a model Keggin‐type POM called TBA4PVMo11O40 (TBA−PVMo11) is supported on oxides (TBA−PVMo11/support) using an incipient wetness method in acetonitrile. This TBA−PVMo11/support was cation‐exchanged with cesium trifluoromethanesulfonate in ethanol to obtain supported‐POM Cs salts (Cs−PVMo11/support). Various characterizations revealed that the TBA−PVMo11/support maintained the original Keggin structure during cation exchange and that Cs−PVMo11 was highly dispersed on the supports. Furthermore, Cs−PVMo11/support maintained the Keggin structure even after calcination at 573 K under an aerobic condition.
    English, Scientific journal
    DOI：https://doi.org/10.1002/cnma.202300014
    DOI ID：10.1002/cnma.202300014, ISSN：2199-692X, ORCID：151631225
  • Selective oxidation of methane into formaldehyde and carbon monoxide catalyzed by supported thermally stable iron oxide subnanoclusters prepared from a diiron-introduced polyoxometalate precursor　　　　　　　　　　　　　　　
    Keiju Wachi; Tomohiro Yabe; Takaaki Suzuki; Kentaro Yonesato; Kosuke Suzuki; Kazuya Yamaguchi
    Applied Catalysis B: Environmental, Oct. 2022, [Reviewed]
    English, Scientific journal
    DOI：https://doi.org/10.1016/j.apcatb.2022.121420
    DOI ID：10.1016/j.apcatb.2022.121420, ISSN：0926-3373, ORCID：151631263
■ Lectures, oral presentations, etc.
  • 担持多核モリブデン酸化物触媒を用いた選択的アセトン水素化脱酸素反応　　　　　　　　　　　　　　　
    鈴木崇哲; 矢部智宏; 山口和也
    Oct. 2024
  • 担持モリブデン酸化物触媒を用いた選択的アセトン水素化脱酸素反応　　　　　　　　　　　　　　　
    鈴木崇哲; 矢部智宏; 山口和也
    Sep. 2024
  • 担持ポリオキソメタレート触媒を用いた選択的アセトン水素化脱酸素反応　　　　　　　　　　　　　　　
    鈴木崇哲; 矢部智宏; 山口和也
    Mar. 2024
  • Creation of Highly Dispersed Supported Polyoxometalate Cesium Salts　　　　　　　　　　　　　　　
    T. Suzuki; T. Yabe; K. Wachi; K. Yonesato; K. Suzuki; K. Yamaguchi
    19th Korea-Japan Symposium on Catalysis, May 2023
  • 熱安定性を有する高分散担持ポリオキソメタレートセシウム塩の開発　　　　　　　　　　　　　　　
    鈴木崇哲; 矢部智宏; 和知慶樹; 米里健太郎; 鈴木康介; 山口和也
    Mar. 2023
  • Development of thermally stable highly dispersed supported polyoxometalate cesium salts　　　　　　　　　　　　　　　
    T. Suzuki; T. Yabe; K. Wachi; K. Yonesato; K. Suzuki; K. Yamaguchi
    52nd Petroleum-Petrochemical Symposium of JPI, Oct. 2022
  • 高難度気相酸化反応を指向した担持ポリオキソメタレートセシウム塩触媒の開発　　　　　　　　　　　　　　　
    鈴木崇哲; 矢部智宏; 和知慶樹; 鈴木康介; 山口和也
    May 2022
  • 担持ポリオキソメタレートアルキルアンモニウム塩のセシウム塩へのカチオン交換法の開発　　　　　　　　　　　　　　　
    鈴木崇哲; 矢部智宏; 和知慶樹; 鈴木康介; 山口和也
    Mar. 2022
  • イソブタン選択酸化反応を指向した担持ポリオキソメタレート触媒の開発　　　　　　　　　　　　　　　
    鈴木崇哲
    Aug. 2021
  • 高選択的酸化反応を指向したポリオキソメタレート分子固体触媒の開発　　　　　　　　　　　　　　　
    鈴木崇哲; 矢部智宏; 鈴木康介; 山口和也
    Oct. 2020
■ Teaching experience
  • Apr. 2025 - Present
    応用化学実験Ⅰ
■ Research projects
  • アセトンからの高選択的プロピレン合成を指向した担持ポリオキソメタレート触媒の開発　　　　　　　　　　　　　　　
    23 Apr. 2024 - 31 Mar. 2026
    Grant amount(Total)：1600000, Direct funding：1600000
    Grant number：24KJ0685
TOP