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Preparation of supported gold catalysts from gold complexes and their catalytic activities for CO oxidation

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Abstract

A phosphine-stabilized mononuclear gold complex Au(PPh3)(NO3) (1) and a phosphine-stabilized gold cluster [Aug(PPh3)8](NO3)3 (2) were used as precursors for preparation of supported gold catalysts. Both complexes 1 and 2 supported on inorganic oxides such as α-Fe2O3, TiO2, and SiO2 were inactive for CO oxidation, whereas the 1 or 2/ oxides treated under air or CO or 5% h2/Ar atmosphere were found to be active for CO oxidation. The catalytic activity depended on not only the treatment conditions but also the kinds of the precursor and the supports used. The catalysts derived from 1 showed higher activity than those derived from 2. α-Fe2O3 and TiO2 were much more efficient supports than SiO2 for the gold particles which were characterized by XRD and EXAFS.

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Authors and Affiliations

  1. Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, 113, Tokyo, Japan

    Youzhu Yuan & Yasuhiro Iwasawa

  2. Department of Chemistry and State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen University, 361005, Xiamen, PR China

    Youzhu Yuan, Huilin Wan & Khirui Tsai

  3. Research Center for Spectrochemistry, Faculty of Science, The University of Tokyo, Hongo, Bunkyo-ku, 113, Tokyo, Japan

    Kiyotaka Asakura

Authors
  1. Youzhu Yuan
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  2. Kiyotaka Asakura
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  3. Huilin Wan
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  4. Khirui Tsai
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  5. Yasuhiro Iwasawa
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Yuan, Y., Asakura, K., Wan, H. et al. Preparation of supported gold catalysts from gold complexes and their catalytic activities for CO oxidation. Catal Lett 42, 15–20 (1996). https://doi.org/10.1007/BF00814461

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  • DOI: https://doi.org/10.1007/BF00814461

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