Influence of the preparation methods for Pt/CeO2 and Au/CeO2 catalysts in CO oxidation

被引：24

作者：

Shimada, Satoshi ^{[1
]}

Takei, Takashi ^{[1
]}

Akita, Tomoki ^{[2
]}

Takeda, Seiji ^{[3
]}

Haruta, Masatake ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, 1-1 Minami Osawa, Tokyo 1920397, Japan

[2] AIST, Ikeda, Osaka 5638577, Japan

[3] Osaka Univ, Fac Sci, Suita, Osaka 5650871, Japan

来源：

SCIENTIFIC BASES FOR THE PREPARATION OF HETEROGENEOUS CATALYSTS: PROCEEDINGS OF THE 10TH INTERNATIONAL SYMPOSIUM | 2010年 / 175卷

关键词：

Pt; Au; CeO2; CO oxidation;

D O I：

10.1016/S0167-2991(10)75174-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The influence of the preparation methods (IP: impregnation, DP: deposition-precipitation, SG: solid grinding) for Pt/CeO2 and Au/CeO2 was studied on the size and shape of metal particles and the catalytic activity for CO oxidation. The fine structures of these catalysts were examined by HR-TEM and were correlated to their catalytic properties. The size of metal particles depended on the preparation methods and increased in the order of DP < SG < IP. Gold on CeO2 was much more active than Pt/CeO2, but the activation energy were similar (in the range of 46 similar to 56kJ/mol). The turnover frequency based on surface exposed metal atom sharply increased with a decrease in the mean diameter of Au particles, whereas it decreased in the case of Pt/CeO2.

引用

页码：843 / 847

页数：5

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