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Development of the dynamical structure analysis method of reaction intermediates by means of time-resolved XAFS

Research Project

Project/Area Number 11440180
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section一般
Research Field Physical chemistry
Research InstitutionHigh energy accelerator research organization

Principal Investigator

NOMURA Masaharu  Institute of materials structure science, Professor, 物質構造科学研究所, 教授 (70156230)

Co-Investigator(Kenkyū-buntansha) IWASAWA Yasuhiro  Department of Chemistry, Graduate School of Science, the University of Tokyo, Professor, 大学院・理学系研究科, 教授 (40018015)
ASAKURA Kiyotaka  Catalysis research center, Hokkaido University, Professor, 触媒化学研究センター, 教授 (60175164)
MATSUSHITA Tadashi  Institute of materials structure science, Professor, vise president, 物質構造科学研究所, 教授、副所長 (40092332)
INADA Yasuhiro  Research Center for Materials Science, Nagoya University, research Associate, 物質科学国際研究センター, 助手 (60242814)
FUNAHASHI Shigenobu  Department of Chemistry, Graduate School of Science, Nagoya University, Professor, 大学院・理学研究科, 教授 (30022700)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 2000: ¥5,600,000 (Direct Cost: ¥5,600,000)
Keywordsdispersive XAFS / time-resolved XAFS / Cu0ZSM-5 catqalyst / catalysis
Research Abstract

A compact mirror bender and a mirror, which can be installed in a dispersive XAFS experimental system, were developed. The mirror system is used to focus the beam vertically and reduce the higher order content. Triangular polychomator crystals and the bender system for it was used at first, but a new rectangular polychromator crystal and a bender to realize elliptical shape is newly developed in order to achieve smaller focus size at the sample position. The focus sizes were evaluated. A coupling optics system to meet the requirement of kinetics mode of a CCD detector is also developed.
Cu-ZSM-5 catalyst is well known that it has unique catalytic property for NO decomposition and its activity is related to the redox reaction of copper species. The time resolved reduction process of copper cations in ZSM-5 during temperature-programmed reduction (300-700K) was studied by using the energy-dispersive XAFS system developed in this research with 1 sec. time-resolution. The isolated Cu^<2+> species in the channel were reduced stepwise. They were reduced to isolated Cu^+ species at 400-450 K, then to Cu^0 metallic clusters at 550-650K.Small clusters like Cu_4 were initially formed, followed by particle growth. A small part of them went out to the outer surfaces of ZSM-5 during the reduction.
Preliminary experiment of solution reaction by using sropped-flow apparatus was also carried out. It is confirmed that fairly high quality data can be obtained by using the system developed in this research.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] 山口有朋 他: "時間分解DXAFS法によるCu/ZSM-5触媒の還元過程に関する研究"触媒. 42. 419-421 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchia et al.: "Time-resolved DXAFS study on the reduction process of Cu cations in ZSM-5"Catalysis Letters. 68. 139-145 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 野村 昌治: "時分割XAFS"放射光. 13. 319-321 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi et al.: "Time-resolved energy-dispersive XAFS study on the reduction process of Cu-ZSM-5 catalysts"Journal of Synchrotron Radiation. 8. 654-656 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Shido et al.: "DXAFS study on the decarbonylation process of Mo(CO)_6 in Nay supercage"Journal of Synchrotron Radiation. 8. 628-630 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi et al.: "Energy-dispersive XAFS Study on the decarbonylation process of Mo(CO)_6 in NaY zeolite", CataI.Lett., in press"Catalysis Letters. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi et al.: "In situ energy-dispersive XAFS study of the reduction process of Cu-ZSM-5 catalysts with 1s time-resolution"Stud.Surf.Sci.Catal. (印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Shido et al.: "Dispersive XAFS study on Cu and Mo species in zeolites during the catalyst preparation"Topics in Catal. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi et al.: "In-situ time -resolved energy-dispersive XAFS study on the reduction processes of Cu-ZSM-5 catalysts"Bull.Chem.Soc.JPn. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yamaguchi A., Shido T., Inada, Y., Asakura, K., Nomura, M.and Iwasawa, Y.: "Time-resolved DXAFS study of the reduction process of Cu/ZSM-5(in Japanese)"Shokubai. 42. 419-421 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi, T.Shido, Y.Inada, Y.Kogure, K.Asakura, M.Nomura and Y.Iwasawa: "Time-resolved DXAFS Study on the reduction processes of Cu cations in ZSM-5"Catal. Lett.. 68. 139-145 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi, A.Suzuki, T.Shido, Y.Inada, K.Asakura, M, Nomura and Y.Iwasawa: "Energy-dispersive XAFS Study on the decarbonylation process of Mo(Co)_6 in NaY zeolite"CataI.Lett.. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi, Y.Inada, T.Shido, K, Asakura, M.Nomura and Y.Iwasawa: "Time-resolved energy-dispersive XAFS study on the reduction process of Cu-ZSM-5 catalysts"J.Synchrotron Rad.. 8. 654-656 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi, Y.Inada, T.Shido, K.Asakura, M.Nomura and Y.Iwasawa: "In situ energy-dispersive XAFS study of the reduction process of Cu-ZSM-5 catalysts with 1s time-resolution"Stud. Surf. Sci. Catal.. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Shido, A.Yamaguchi, Y.Inada, K.Asakura, M.Nomura and Y.Iwasawa: "DXAFS study on the decarbonylation process of Mo(CO)_6 in NaY supercage"J.Synchrotron Rad.. 8. 628-630 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Shido, A.Yamaguchi, Y.Inada, K.Asakura, M.Nomura and Y.Iwasawa: "Dispersive XAFS study on Cu and Mo species in zeolites during the catalyst preparation"Topics in Catal.. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Yamaguchi, T.Shido, Y.Inada, T.Kogure, K.Asakura, M.Nomura and Y.Iwasawa: "In-situ time-resolved energy-dispersive XAFS study on the reduction processes of Cu-ZSM-5 catalysts"Bull. Chem. Soc. Jpn. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nomura, M.: "Time-resolved XAFS(in Japanese)"Houshakou. 13. 319-321 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 山口有朋,野村昌治,岩澤康裕 他: "時間分解DXAFS法によるCu/ZSM-5触媒の還元過程に関する研究"触媒. 42. 419-421 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Yamaguchi,M.Nomura et al.: "Time-resolved DXAFS study on the reduction process of Cu cations in ZSM-5"Catalysis Letters. 68. 139-145 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 野村昌治: "時分割XAFS"放射光. 13. 319-321 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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