抄録
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.
本文言語 | English |
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ページ(範囲) | 4885-4888 |
ページ数 | 4 |
ジャーナル | Journal of Physical Chemistry C |
巻 | 111 |
号 | 13 |
DOI | |
出版ステータス | Published - 2007 4月 5 |
外部発表 | はい |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- エネルギー(全般)
- 物理化学および理論化学
- 表面、皮膜および薄膜