Moisture effect on CO oxidation over Au/TiO2 catalyst

被引：444

作者：

Daté, M ^{[1
]}

Haruta, M ^{[1
]}

机构：

[1] Osaka Natl Res Inst, AIST, Natl Inst Adv Ind Sci & Technol, Ikeda, Osaka 5638577, Japan

来源：

JOURNAL OF CATALYSIS | 2001年 / 201卷 / 02期

关键词：

CO; oxidation; Au; TiO2; moisture;

D O I：

10.1006/jcat.2001.3254

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：

The effect of moisture in the reactant gas on CO oxidation over Au/TiO2 has been quantitatively investigated over a wide range of concentrations from 0.1 to 6,000 ppm. Moisture enhances the reaction by more than 10 times up to 200 ppm H2O, while further increase in the moisture content suppresses the reaction. The apparent activation energy is, however, independent of the amount of moisture. The amount of moisture adsorbed on the catalyst influences the activity rather than the moisture content in the gas phase, which suggests that the low-temperature CO oxidation over the gold catalyst involves water-derived species on the catalyst surface. (C) 2001 Academic Press.

引用

页码：221 / 224

页数：4

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