Low-temperature water-gas shift reaction on Au/alpha-Fe2O3 catalyst

被引：187

作者：

Andreeva, D ^{[1
]}

Idakiev, V ^{[1
]}

Tabakova, T ^{[1
]}

Andreev, A ^{[1
]}

Giovanoli, R ^{[1
]}

机构：

[1] UNIV BERN, ELECTRON MICROSCOPY LAB, CH-3000 BERN 9, SWITZERLAND

来源：

APPLIED CATALYSIS A-GENERAL | 1996年 / 134卷 / 02期

关键词：

gold alpha-ferric oxide; water-gas shift reaction; mechanism;

D O I：

10.1016/0926-860X(95)00208-1

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 [物理化学]; 081704 [应用化学];

摘要：

The water-gas shift reaction (WGSR) has been studied on Au/alpha-Fe2O3 catalyst. The structure of the samples has been investigated by chemical and physical methods - TEM, X-ray, DTA, FTIR. A high dispersion degree of the gold particles and an increased concentration of the hydroxyl groups on Au/alpha-Fe2O3 has been established in comparison to the pure alpha-Fe2O. The results obtained can be explained on the basis of the associative mechanism of the WGSR. The essential aspects are the dissociative adsorption of water on ultrafine gold particles, followed by spillover of active hydroxyl groups onto adjacent sites of the ferric oxide. The formation and decomposition of intermediate species is accompanied by redox transfer Fe3+ <-> Fe2+ in Fe3O4.

引用

页码：275 / 283

页数：9

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