Effect of Ag-Doping on the Catalytic Activity of Polymer-Stabilized Au Clusters in Aerobic Oxidation of Alcohol

DOI Web Site 被引用文献35件
  • Nirmalya K. Chaki
    Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki 444-8585, Japan, and CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
  • Hironori Tsunoyama
    Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki 444-8585, Japan, and CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
  • Yuichi Negishi
    Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki 444-8585, Japan, and CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
  • Hidehiro Sakurai
    Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki 444-8585, Japan, and CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
  • Tatsuya Tsukuda
    Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki 444-8585, Japan, and CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan

書誌事項

公開日
2007-03-09
DOI
  • 10.1021/jp070791s
公開者
American Chemical Society (ACS)

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説明

A set of nearly monodisperse Au−Ag alloy clusters (size range 1.6−2.2 nm) with various Ag content (5−30%) was prepared by the co-reduction method in the presence of poly(N-vinyl-2-pyrrolidone) (PVP). The catalytic activities of the Au−Ag:PVP clusters were investigated for aerobic oxidation of p-hydroxybenzyl alcohol as a model reaction to understand the effect of Ag on the catalytic activity of Au clusters. It was found that the rate constants per unit surface area for Au−Ag:PVP clusters with small Ag content (<10%) were larger than those of monometallic Au:PVP clusters of comparable size. The enhancement of the catalytic activity by Ag doping is discussed in light of the electronic structure of the Au−Ag cores probed by X-ray photoelectron spectroscopy. The present results indicate that the partial anionic character of the Au core is important for the aerobic oxidation reactions of Au:PVP clusters.

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