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Vital Role of Moisture in the Catalytic Activity of Supported Gold Nanoparticles

Authors

  • Masakazu Daté Dr.,

    1. Research Institute for Green Technology, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba 305-8569, Japan, Fax: (+81) 29-861-8482
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  • Mitsutaka Okumura Dr.,

    1. Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka 560-0043, Japan
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  • Susumu Tsubota Dr.,

    1. Research Institute for Green Technology, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba 305-8569, Japan, Fax: (+81) 29-861-8482
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  • Masatake Haruta Dr.

    1. Research Institute for Green Technology, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba 305-8569, Japan, Fax: (+81) 29-861-8482
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  • The authors would like to acknowledge Dr. Satoshi Ichikawa for his TEM observations, as well as Mr. Takeshi Yamashita and Mr. Akihiko Yamaguchi for their assistance in catalyst preparation and activity measurements. The authors would also express their deep thanks to Prof. Ted S. Oyama for his critical comments and valuable discussion.

Abstract

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Supported gold nanoparticles exhibit high catalytic activity not only at low temperatures, but also under the presence of moisture. The effect of moisture on CO oxidation over Au/TiO2, Au/Al2O3, and Au/SiO2 was studied at 273 K. It was found that the catalytic activities are enhanced by moisture by up to two orders of magnitude, and that the moisture effect depends on the type of oxide support (see picture, TOF=turnover frequency).

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