Effect of impurity and pretreatment conditions on the catalytic activity of Au powder for CO oxidation

被引：61

作者：

Iizuka, Y ^{[1
]}

Kawamoto, A

Akita, K

Daté, M

Tsubota, S

Okumura, M

Haruta, M

机构：

[1] Kyoto Inst Technol, Sakyo Ku, Kyoto 6068585, Japan

[2] AIST Tsukuba, Res Inst Green Technol, Tsukuba, Ibaraki 3058569, Japan

来源：

CATALYSIS LETTERS | 2004年 / 97卷 / 3-4期

关键词：

unsupported Au powder; CO oxidation; surface impurity; contact interface effect; particle size effect;

D O I：

10.1023/B:CATL.0000038585.12878.9a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Recent X-ray photoelectron spectrometer(XPS) analysis of Au powder synthesized by evaporating high purity gold metal (> 99.99%) in an inert gas detected impurity metals such as Ag and In at levels which far exceed those expected from the impurity levels of raw gold metal. Several samples of Au powder containing different amount of impurity metals were prepared to examine whether the activity of the Au powder for CO oxidation depends upon the impurity or not. The activity of the powder showed a strong correlation with the surface concentration of Ag.

引用

页码：203 / 208

页数：6

共 6 条

[1] Size- and support-dependency in the catalysis of gold [J].