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Control of electronic structure of μ-oxo based on polyoxometalates and its application to selective oxidation reactions

Research Project

Project/Area Number 22K14539
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 27030:Catalyst and resource chemical process-related
Research InstitutionThe University of Tokyo

Principal Investigator

Yabe Tomohiro  東京大学, 大学院工学系研究科(工学部), 助教 (40803234)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsメタン / 選択酸化 / ポリオキソメタレート / サブナノクラスター / 酸化鉄 / ホルムアルデヒド / セシウム塩 / ナノクラスター / ミューオキソ / メタノール
Outline of Research at the Start

欠損型ポリオキソメタレート(POM)を鋳型として複数のミューオキソ構造を有する金属多核活性点を精密に設計し、架橋酸素の反応性を制御することで、難反応性低分子の選択酸化反応を提案する。1原子単位で構造を制御して狙ったPOMを合成し、オンデマンド・高選択的に酸素から活性酸素種を作る。まず架橋酸素の反応性を制御したミューオキソ構造を有する金属置換POMを精密に設計し、酸化物に担持することで高効率な固体触媒を創出する。従来型のバルク酸化物触媒や金属担持触媒とは一線を画した、ミューオキソ構造を有する金属置換POM触媒による選択酸化反応を確立させ、ビルドアップ型触媒設計における新たな学理を体系化する。

Outline of Final Research Achievements

In this study, multiple μ-oxo structures were designed using lacunary polyoxometalates as molecular templates to create metal multinuclear active sites. By controlling the reactivity of the bridging oxygen, selective oxidation of methane by oxygen was achieved. Iron-containing polyoxometalate catalysts, specifically those with fewer nuclei, were designed to have the targeted μ-oxo structures by controlling at the atomic level and were highly dispersed on oxides. It was found that this method resulted in the formation of highly dispersed Fe-μ-oxo structures. In these highly dispersed Fe-μ-oxo structures, the reaction mechanism supposed to involve the direct activation of oxygen, rather than the Mars-van Krevelen mechanism, which primarily proceeds through lattice oxygen in bulk oxides. This strategy establishes one approach for controlling the reactivity of bridging oxygen.

Academic Significance and Societal Importance of the Research Achievements

本研究では、1原子単位で構造を制御して狙ったμ-オキソ構造を有する金属多核活性点を設計したポリオキソメタレート触媒を酸化物に高分散に担持することによって、非常に高分散なFe-μ-oxo構造の形成やメタン選択酸化における触媒特性を調べた。前駆体であるポリオキソメタレート中の鉄の核数が小さいほど目的の架橋酸素が効率よく形成することを見出し、メタン選択酸化活性が髙い架橋酸素を豊富に有する触媒設計指針が得られた。メタン酸化は生成物の反応性が原料よりも高いために反応の制御が難しく工業化が難しい。本触媒系はこの問題点を解決する一助になると考えられるため、社会的に意義深い成果が得られた。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2022

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Role of polyoxometalate precursors and supports in the selective oxidation of methane into formaldehyde using supported metal oxide subnanocluster catalysts2023

    • Author(s)
      Wachi Keiju、Yabe Tomohiro、Suzuki Takaaki、Yonesato Kentaro、Suzuki Kosuke、Yamaguchi Kazuya
    • Journal Title

      Catalysis Science & Technology

      Volume: 13 Issue: 16 Pages: 4744-4752

    • DOI

      10.1039/d3cy00750b

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Creation of Highly Dispersed Supported Polyoxometalate Cesium Salts via Cation Exchange from Alkylammonium Salts on Supports2022

    • Author(s)
      Suzuki Takaaki、Yabe Tomohiro、Wachi Keiju、Yonesato Kentaro、Suzuki Kosuke、Yamaguchi Kazuya
    • Journal Title

      ChemNanoMat

      Volume: 9 Issue: 2

    • DOI

      10.1002/cnma.202200428

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 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2024

    • Author(s)
      鈴木 崇哲, 矢部 智宏, 山口 和也
    • Organizer
      日本化学会第104春季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Creation of Highly Dispersed Supported Polyoxometalate Cesium Salts2023

    • Author(s)
      Takaaki Suzuki, Tomohiro Yabe, Keiju Wachi, Kentaro Yonesato, Kosuke Suzuki, Kazuya Yamaguchi
    • Organizer
      The 19th Korea-Japan Symposium on Catalysis
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 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2022

    • Author(s)
      鈴木崇哲、矢部智宏、和知慶樹、鈴木康介、山口和也
    • Organizer
      第64回年会(第70回The Japan Petroleum Institute研究発表会)
    • Related Report
      2022 Research-status Report
  • [Presentation] Selective oxidation of methane catalyzed by supported iron oxide subnanoclusters prepared from a diiron-introduced polyoxometalate precursor2022

    • Author(s)
      Tomohiro Yabe, Keiju Wachi, Takaaki Suzuki, Kentaro Yonesato, Kosuke Suzuki, Kazuya Yamaguchi
    • Organizer
      12th International Conference on Environmental Catalysis
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of thermally stable highly dispersed supported polyoxometalate cesium salts2022

    • Author(s)
      Takaaki Suzuki, Tomohiro Yabe, Keiju Wachi, Kentaro Yonesato, Kosuke Suzuki, Kazuya Yamaguchi
    • Organizer
      長野大会(第52回石油・石油化学討論会)
    • Related Report
      2022 Research-status Report
  • [Presentation] 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2022

    • Author(s)
      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
    • Organizer
      第131回触媒討論会
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2025-01-30  

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