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Dynamic behavior study on automobile exhaust catalysts by operando technique

Research Project

Project/Area Number 18K14055
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 InstitutionKyoto University

Principal Investigator

Asakura Hiroyuki  京都大学, 実験と理論計算科学のインタープレイによる触媒・電池の元素戦略研究拠点ユニット, 特定講師 (40631974)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords自動車排ガス浄化触媒 / 三元触媒 / Operando / X線吸収分光 / XAS / 自動車触媒 / 遷移金属酸化物 / XAFS
Outline of Final Research Achievements

Towards a sustainable society, we have studied non-precious metal based automobile exhaust catalysts (three-way catalysts) to reduce the use of precious metals like Rh, Pd, and Pt. After the screening of non-precious metals like Mn, Fe, Co, Ni, Cu as catalyst components, we found a binary catalyst of Cu and Ni exhibited relatively high catalytic activity. An operando study at SPring-8, we found coexistence of Cu species maintained catalytically active state of Ni during the catalysis. Addition of Fe as the third component to the Cu-Ni catalyst further improved catalytic activity.

Academic Significance and Societal Importance of the Research Achievements

自動車排ガス浄化触媒にはロジウム,パラジウム,白金などの貴金属が利用されており,その使用量の削減が求められている.本研究では汎用金属元素である銅とニッケル,さらにこれに鉄を添加した触媒が比較的高い活性を示すことを見いだした.現段階では実用化されている貴金属触媒の活性には劣るものの,更なる改良を望まれる.また,大型放射光施設SPring-8における分析で,触媒反応条件下における活性金属種の変化を明らかにした.本分析手法は,自動車排ガス浄化触媒のみならず,様々な触媒の分析に利用可能である.

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Self-regeneration of a Ni-Cu alloy catalyst during a three-way catalytic reaction2019

    • Author(s)
      H. Asakura, T. Onuki, S. Hosokawa, N. Takagi, S. Sakaki, K. Teramura, and T. Tanaka
    • Journal Title

      Phys. Chem. Chem. Phys.

      Volume: 21 Issue: 35 Pages: 18816-18822

    • DOI

      10.1039/c9cp01884k

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 自動車排ガス浄化触媒を志向したNi-Cu合金触媒の酸化還元挙動2020

    • Author(s)
      朝倉博行,細川三郎,寺村謙太郎,田中庸裕
    • Organizer
      第33回日本放射光学会年会・放射光科学合同シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Redox behavior of Ni-Cu bimetallic alloy catalysts for automobile exhaust purification2019

    • Author(s)
      Hiroyuki Asakura, Saburo Hosokawa, Kentaro Teramura, Nozomi Takagi, Shigeyoshi Sakaki, Tsunehiro Tanaka
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CuZn/Al2O3の三元触媒活性評価2019

    • Author(s)
      切原麻帆・小貫哲雄・朝倉博行・細川 三郎・寺村謙太郎・田中庸裕
    • Organizer
      第123回触媒討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] Rh-Fe/Al2O3触媒中における Feの酸化還元挙動と三元触媒活性の検討2019

    • Author(s)
      藤田京子・別府孝介・細川三郎・朝倉博行・寺村謙太郎・田中庸裕
    • Organizer
      第123回触媒討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 二元系金属触媒の三元触媒活性2018

    • Author(s)
      切原麻帆, 小貫哲雄, 朝倉博行, 細川三郎, 寺村謙太郎, 田中庸裕
    • Organizer
      第48回石油・石油化学討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 二元系金属触媒による三元触媒活性の評価2018

    • Author(s)
      切原麻帆, 小貫哲雄, 朝倉博行, 細川三郎, 寺村謙太郎, 田中庸裕
    • Organizer
      第122回触媒討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 二元系卑金属触媒における三元触媒活性の評価2018

    • Author(s)
      切原麻帆, 小貫哲雄, 朝倉博行, 細川三郎, 寺村謙太郎, 田中庸裕
    • Organizer
      第12回触媒道場
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2021-02-19  

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