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Effect of Impurity and Pretreatment Conditions on the Catalytic Activity of Au Powder for CO Oxidation

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Abstract

Recent X-ray photoelectron spectrometer(XPS) analysis of Au powder synthesized by evaporating high purity gold metal (> 99. 99%) in an inert gas detected impurity metals such as Ag and In at levels which far exceed those expected from the impurity levels of raw gold metal. Several samples of Au powder containing different amount of impurity metals were prepared to examine whether the activity of the Au powder for CO oxidation depends upon the impurity or not. The activity of the powder showed a strong correlation with the surface concentration of Ag.

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Author notes

  1. Mitsutaka Okumura

    Present address: Research Institute for Green Technology, AIST Tsukuba, 16-1 Onogawa, Tsukuba, 305-8569, Japan

Authors and Affiliations

  1. Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan

    Yasuo Iizuka, Aya Kawamoto & Kazuhiro Akita

  2. Research Institute for Green Technology, AIST Tsukuba, 16-1 Onogawa, Tsukuba, 305-8569, Japan

    Masakazu Daté, Susumu Tsubota & Masatake Haruta

Authors
  1. Yasuo Iizuka
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  2. Aya Kawamoto
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  3. Kazuhiro Akita
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  4. Masakazu Daté
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  5. Susumu Tsubota
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  6. Mitsutaka Okumura
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  7. Masatake Haruta
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Iizuka, Y., Kawamoto, A., Akita, K. et al. Effect of Impurity and Pretreatment Conditions on the Catalytic Activity of Au Powder for CO Oxidation. Catalysis Letters 97, 203–208 (2004). https://doi.org/10.1023/B:CATL.0000038585.12878.9a

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  • DOI: https://doi.org/10.1023/B:CATL.0000038585.12878.9a

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