Low-temperature water-gas shift reaction on Au/CeO2 catalysts -: the influence of catalyst pre-treatment on the activity and deactivation in idealized reformate

被引：33

作者：

Karpenko, A.

Denkwitz, Y.

Plzak, V.

Cai, J.

Leppelt, R.

Schumacher, B.

Behm, R. J. ^{[1
]}

机构：

[1] Univ Ulm, Inst Catalysis & Surface Chem, D-89069 Ulm, Germany

[2] Ctr Solar Energy & Hydrogen Res, D-89081 Ulm, Germany

来源：

CATALYSIS LETTERS | 2007年 / 116卷 / 3-4期

关键词：

water-gas shift reaction; Au catalyst; catalyst conditioning; deactivation; Au/CeO2; GC; DRIFTS; XPS;

D O I：

10.1007/s10562-007-9111-z

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 the pre-treatment temperature and atmosphere on the surface composition and on the activity and stability of well defined Au/CeO2 catalysts in the low-temperature water-gas shift reaction in dilute water gas was investigated by X-ray photoelectron spectroscopy, kinetic measurements and in-situ IR spectroscopic (DRIFTS) measurements, comparing different reductive and oxidative conditioning procedures. Reductive conditioning at 200 degrees C yields the most active catalyst. Physical origin and consequences of the resulting differences in the reaction behavior are discussed.

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收藏

页码：105 / 115

页数：11

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