固体触媒の触媒反応条件下におけるin-situ XAFS測定  [in Japanese] In-situ XAFS Analysis of the Catalysts under Reaction Conditions  [in Japanese]

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Abstract

Recently <I>in-situ</I> XAFS analysis of the catalysts under reaction conditions has widely been performed together with synchrotron radiation light sources of the 2nd−3rd generation. In some cases this method requires time-resolving analytical techniques such as DXAFS and QXAFS. In addition, design of the in-situ cell is crucial for obtaining spectra which properly reflect the structures of the catalysts under reaction conditions. Two kinds of <I>in-situ</I> cells designed for experiments under high-pressure conditions are presented. Four of recent works are reviewed: Observation of Mo suboxide species during reduction of MoO<Sub>3</Sub>, Cu<Sup>+</Sup> species formed in Cu-ZSM-5 during reduction process, structural change of Cu metal particles on Cu/ZnO under various reaction conditions, and Rh species during CO<Sub>2</Sub> hydrogenation. Intermediate species appearing in the course of chemical reactions have very short lives, therefore continuous observation of surface species by <I>in-situ</I> method is indispensable for detection of such species. Moreover, the <I>in-situ</I> method is the only way to obtain the structure of catalysts under the reaction conditions.

Journal

  • Hyomen Kagaku

    Hyomen Kagaku 23(4), 215-223, 2002-04-10

    The Surface Science Society of Japan

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Codes

  • NII Article ID (NAID)
    10008008447
  • NII NACSIS-CAT ID (NCID)
    AN00334149
  • Text Lang
    JPN
  • Article Type
    REV
  • ISSN
    03885321
  • NDL Article ID
    6135233
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z15-379
  • Data Source
    CJP  NDL  J-STAGE 
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