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Effect of Electronic Structures of Au Clusters Stabilized by Poly(N-vinyl-2-pyrrolidone) on Aerobic Oxidation Catalysis

Tsunoyama, Hironori, Ichikuni, Nobuyuki, Sakurai, Hidehiro, Tsukuda, Tatsuya·2009·Journal of the American Chemical Society

Abstract

Au clusters smaller than 1.5 nm and stabilized by poly(N-vinyl-2-pyrrolidone) (PVP) showed higher activity for aerobic oxidation of alcohol than those of larger size or stabilized by poly(allylamine) (PAA). X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy of adsorbed CO, and X-ray absorption near edge structure measurements revealed that the catalytically active Au clusters are negatively charged by electron donation from PVP, and the catalytic activity is enhanced with increasing electron density on the Au core. Based on similar observations of Au cluster anions in the gas phase, we propose that electron transfer from the anionic Au cores of Au:PVP into the LUMO (pi*) of O(2) generates superoxo- or peroxo-like species, which plays a key role in the oxidation of alcohol. On the basis of these results, a simple principle is presented for the synthesis of Au oxidation catalysts stabilized by organic molecules.

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Metadata

Authors
Tsunoyama, H., Ichikuni, N., Sakurai, H., & Tsukuda, T.
Venue
Journal of the American Chemical Society
Published
2009-05-01
Volume
131
Issue
20
Pages
7086-7093
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2029777289
Cited by
670
References
3
FWCI
21.37
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Effect of Electronic Structures of Au Clusters Stabilized by Poly(N-vinyl-2-pyrrolidone) on Aerobic Oxidation Catalysis. https://app.cochat.ai/papers/10.1021/ja810045y
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Tsunoyama, H., Ichikuni, N., Sakurai, H., & Tsukuda, T. (2009). Effect of Electronic Structures of Au Clusters Stabilized by Poly(N-vinyl-2-pyrrolidone) on Aerobic Oxidation Catalysis. Journal of the American Chemical Society. https://doi.org/10.1021/ja810045y

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