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Noble-metal-free catalysts to decompose volatile organic compounds at low temperatures by using the lattice oxygen

Research Project

Project/Area Number 21K04642
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionOsaka University

Principal Investigator

Nunotani Naoyoshi  大阪大学, 大学院工学研究科, 助教 (40715314)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords環境触媒 / 貴金属フリー / 揮発性有機化合物 / 酸化触媒
Outline of Research at the Start

揮発性有機化合物(Volatile Organic Compounds; VOCs)は、有機溶剤として広く使用されているが、人体や環境に有害な化合物でもある。大気中のVOCsを高効率で酸化分解できる触媒としては貴金属系触媒があるが、希少な貴金属をできる限り使用しないことが重要となっている。本研究では、低温でもVOCsを完全燃焼できる貴金属フリー触媒を実現するため、触媒の格子内酸素をVOCs酸化反応に活用する。即ち、格子内酸素が触媒活性に与える影響を明確にし、得られた知見をもとに高活性な新規貴金属フリーVOCs燃焼触媒の創成を行う。

Outline of Final Research Achievements

Noble-metal-free catalysts were developed in order to effectively decompose volatile organic compounds (toluene, etc.) which are harmful for human health and the environment. I focused on the promoter which can supply oxygen species, and Co3O4/ZrSn0.93Fe0.07O4-δ was synthesized. As a result, this catalyst decomposed toluene at the temperature as low as 250°C. Furthermore, I developed apatite-type La10Si5CoO27-δ with the high thermally stability and the oxygen supply ability. Although La10Si5CoO27-δ was synthesized at 1000°C, it completely oxidized toluene at 310°C, which was comparable to that of Pt/Al2O3 prepared at 1000°C (290°C). For La10Si5CoO27-δ (calcined at 1400°C), complete toluene combustion was realized at 330°C, which was lower than that of Pt/Al2O3 prepared at 1400°C (380°C).

Academic Significance and Societal Importance of the Research Achievements

揮発性有機化合物の燃焼触媒としては、貴金属系触媒が高活性であることが知られているが、貴金属は高価かつ希少であることから貴金属フリー触媒が望まれている。本研究では、格子内からの酸素供給に着目することにより、従来の貴金属フリー触媒より優れた活性を示す触媒を創製した。さらに、Pt系触媒は高温耐久性に問題があり、高濃度トルエンを処理する際に局所過熱(1000℃以上)されると失活するが、高温耐久性に優れる貴金属フリー触媒を新たに設計することにより、そのような高温に暴露された後においてPt系触媒に匹敵あるいは上回る活性を示す触媒も創製した。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (25 results)

All 2024 2023 2022 2021

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 5 results,  Invited: 4 results)

  • [Journal Article] Dihydroxyacetone production by glycerol oxidation under moderate condition using Pt loaded on La1-xBixOF solids2023

    • Author(s)
      Nunotani Naoyoshi、Takashima Masanari、Choi Yeon-Bin、Uetake Yuta、Sakurai Hidehiro、Imanaka Nobuhito
    • Journal Title

      Chemical Communications

      Volume: 59 Issue: 62 Pages: 9533-9536

    • DOI

      10.1039/d3cc01734f

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermally Stable Apatite-type La10Si5CoO27-δ Catalyst for Toluene Combustion2023

    • Author(s)
      Nunotani Naoyoshi、Kakihana Kenjiro、Imanaka Nobuhito
    • Journal Title

      Chemistry Letters

      Volume: 52 Issue: 10 Pages: 771-774

    • DOI

      10.1246/cl.230283

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of environmental catalysts for oxidation of organic compounds with a focus on lattice oxygen2022

    • Author(s)
      Nunotani Naoyoshi
    • Journal Title

      Journal of the Ceramic Society of Japan

      Volume: 130 Issue: 10 Pages: 825-831

    • DOI

      10.2109/jcersj2.22069

    • ISSN
      1348-6535, 1882-0743
    • Year and Date
      2022-10-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pt supported on ZrSn1-xSrxO4-δ for catalytic liquid-phase oxidation of phenol2022

    • Author(s)
      Nunotani Naoyoshi、Morita Kunimitsu、Imanaka Nobuhito
    • Journal Title

      Functional Materials Letters

      Volume: 15 Issue: 06 Pages: 2250025-2250025

    • DOI

      10.1142/s1793604722500254

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of oxide-ion conductivity of apatite-type Ln10Si6O27 on catalytic activity for toluene combustion2021

    • Author(s)
      Matsuo Kenji、Nunotani Naoyoshi、Imanaka Nobuhito
    • Journal Title

      Journal of Asian Ceramic Societies

      Volume: 9 Issue: 4 Pages: 1466-1472

    • DOI

      10.1080/21870764.2021.1992850

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Novel Pt/La1-xBixOF/SBA‐16 catalysts for liquid‐phase phenol oxidation2021

    • Author(s)
      Nunotani Naoyoshi、Li Zhuowei、Imanaka Nobuhito
    • Journal Title

      International Journal of Applied Ceramic Technology

      Volume: 19 Issue: 2 Pages: 746-752

    • DOI

      10.1111/ijac.13877

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 高温耐久性に優れるアパタイト型ケイ酸ランタン系触媒を用いたトルエンの完全燃焼2024

    • Author(s)
      布谷直義、柿花健仁朗、今中信人
    • Organizer
      第133回触媒討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 希土類ケイ酸塩における導電率がトルエン燃焼活性に与える影響2024

    • Author(s)
      布谷直義、松尾健司、今中信人
    • Organizer
      第40回希土類討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Precious-metal-free Catalysts Based on Apatite-type Lanthanum Silicate for Toluene Combustion2023

    • Author(s)
      Naoyoshi Nunotani, Kenji Matsuo, Nobuhito Imanaka
    • Organizer
      15th European Congress on Catalysis (EUROPACAT2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ジルコニウム-スズ複合酸化物系触媒によるビスフェノールA の液相酸化2023

    • Author(s)
      前田気悦、布谷直義、今中信人
    • Organizer
      日本セラミックス協会第36回秋季シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] アパタイト型希土類ケイ酸塩の導電率がトルエン燃焼活性に与える影響2023

    • Author(s)
      布谷直義、松尾健司、今中信人
    • Organizer
      第132回触媒討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Catalytic Combustion of Toluene over Noble-metal-free Catalysts Based on Apatite-type Lanthanum Silicate2023

    • Author(s)
      Naoyoshi Nunotani, Kenji Matsuo, Nobuhito Imanaka
    • Organizer
      The 37th International Korea-Japan Seminar on Ceramics (K-J Ceramics 37)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ジルコニウム-スズ複合酸化物を母体として用いた新規な貴金属フリートルエン燃焼触媒2023

    • Author(s)
      田中巧、布谷直義、今中信人
    • Organizer
      第61回セラミックス基礎科学討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] ジルコニウム-スズ複合酸化物系触媒によるp-クレゾールの液相酸化2023

    • Author(s)
      前田気悦、布谷直義、今中信人
    • Organizer
      第61回セラミックス基礎科学討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] ジルコニウム-スズ複合酸化物系触媒を用いたフェノールの液相酸化分解2023

    • Author(s)
      布谷直義、森田一光、今中信人
    • Organizer
      第131回触媒討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] 格子内酸素に着目した酸化触媒の創成2022

    • Author(s)
      布谷直義
    • Organizer
      日本セラミックス協会関西支部2022年度支部大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] オキシフッ化ランタン系触媒を用いたフェノールの液相酸化2022

    • Author(s)
      布谷直義、李卓蔚、今中信人
    • Organizer
      第38回希土類討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] Catalytic Phenol Oxidation over Pt/CeO2-ZrO2-SnO2/ZrO2/SBA-16 Catalysts in Liquid-phase2022

    • Author(s)
      Naoyoshi Nunotani, Abdul Rohman Supandi, Nobuhito Imanaka
    • Organizer
      The 9th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT9)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Catalytic Liquid-phase Oxidation of Phenol Using Novel Catalysts Based on Lanthanum Oxyfluoride2022

    • Author(s)
      Naoyoshi Nunotani, Zhuowei Li, Nobuhito Imanaka
    • Organizer
      12th International Conference on Environmental Catalysis (ICEC2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 格子内酸素を活用した新規な環境触媒2022

    • Author(s)
      布谷直義
    • Organizer
      コロキウム2022
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 貴金属を含まないランタンシリケート系触媒によるトルエンの完全燃焼2022

    • Author(s)
      柿花健仁朗、松尾健司、布谷直義、今中信人
    • Organizer
      第60回セラミックス基礎科学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 格子内酸素に着目した酸化触媒の創成2022

    • Author(s)
      布谷直義
    • Organizer
      日本セラミックス協会2022年年会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] アパタイト型ランタンシリケート系貴金属フリー触媒によるトルエンの完全燃焼2021

    • Author(s)
      柿花健仁朗、松尾健司、布谷直義、今中信人
    • Organizer
      第37回希土類討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] ケイ酸ランタンを母体とした貴金属フリー触媒のトルエン完全燃焼特性2021

    • Author(s)
      柿花健仁朗、松尾健司、布谷直義、今中信人
    • Organizer
      第10回JACI/GSCシンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Noble-metal-free Catalysts for Toluene Combustion Based on Apatite-type Lanthanum Silicate2021

    • Author(s)
      Kenji Matsuo, Naoyoshi Nunotani, Nobuhito Imanaka
    • Organizer
      14th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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