Effect of Ag-doping on the catalytic activity of polymer-stabilized Au clusters in aerobic oxidation of alcohol

Nirmalya K. Chaki, Hironori Tsunoyama, Yuichi Negishi, Hidehiro Sakurai, Tatsuya Tsukuda

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)4885-4888
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number13
DOIs
Publication statusPublished - 2007 Apr 5
Externally publishedYes

Fingerprint

catalytic activity
Catalyst activity
Polymers
alcohols
Alcohols
Doping (additives)
Oxidation
oxidation
polymers
Electronic structure
Rate constants
X ray photoelectron spectroscopy
photoelectron spectroscopy
electronic structure
augmentation
x rays
2-pyrrolidone
4-hydroxybenzyl alcohol

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Effect of Ag-doping on the catalytic activity of polymer-stabilized Au clusters in aerobic oxidation of alcohol. / Chaki, Nirmalya K.; Tsunoyama, Hironori; Negishi, Yuichi; Sakurai, Hidehiro; Tsukuda, Tatsuya.

In: Journal of Physical Chemistry C, Vol. 111, No. 13, 05.04.2007, p. 4885-4888.

Research output: Contribution to journalArticle

Chaki, Nirmalya K. ; Tsunoyama, Hironori ; Negishi, Yuichi ; Sakurai, Hidehiro ; Tsukuda, Tatsuya. / Effect of Ag-doping on the catalytic activity of polymer-stabilized Au clusters in aerobic oxidation of alcohol. In: Journal of Physical Chemistry C. 2007 ; Vol. 111, No. 13. pp. 4885-4888.
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