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

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

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-hydr...

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Veröffentlicht in:Journal of physical chemistry. C 2007-04, Vol.111 (13), p.4885-4888
Hauptverfasser: Chaki, Nirmalya K., Tsunoyama, Hironori, Negishi, Yuichi, Sakurai, Hidehiro, Tsukuda, Tatsuya
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container_issue 13
container_start_page 4885
container_title Journal of physical chemistry. C
container_volume 111
creator Chaki, Nirmalya K.
Tsunoyama, Hironori
Negishi, Yuichi
Sakurai, Hidehiro
Tsukuda, Tatsuya
description 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 (
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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 (&lt;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.</description><identifier>ISSN: 1932-7447</identifier><identifier>EISSN: 1932-7455</identifier><identifier>DOI: 10.1021/jp070791s</identifier><language>eng</language><publisher>American Chemical Society</publisher><ispartof>Journal of physical chemistry. 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title Effect of Ag-Doping on the Catalytic Activity of Polymer-Stabilized Au Clusters in Aerobic Oxidation of Alcohol
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