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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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Trägerfixierte Gold-Nanopartikel sind nicht nur bereits bei niedrigen Temperaturen, sondern zudem auch in Gegenwart von Feuchtigkeit katalytisch hoch aktiv. Feuchtigkeit erhöht ihre katalytische Aktivität bei der Oxidation von CO über Au/TiO2, Au/Al2O3 und Au/SiO2 bei 273 K um bis zu zwei Größenordnungen, und der Effekt hängt vom Typ des Oxidträgers ab (siehe Bild, TOF=turnover frequency).

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