Redox-catalytic correlations in oxidised copper-ceria CO-PROX catalysts

被引：111
|
作者：
Martinez-Arias, A. [1 ]
Gamarra, D. [1 ]
Fernandez-Garcia, M. [1 ]
Hornes, A. [1 ]
Bera, P. [1 ]
Koppany, Zs. [2 ]
Schay, Z. [2 ]
机构：
[1] CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, Spain
[2] Hungarian Acad Sci, Inst Isotopes, H-1525 Budapest, Hungary
来源：
CATALYSIS TODAY | 2009年 / 143卷 / 3-4期
关键词：
CuO-CeO2; catalysts; CO-PROX; Operando-DRIFTS; Operando-XANES; H-2-TPR; CO-TPR; AREA CUO-CEO2 CATALYSTS; PREFERENTIAL OXIDATION; CARBON-MONOXIDE; SELECTIVE OXIDATION; EXCESS H-2; HYDROGEN; CUO/CEO2; IDENTIFICATION; PERFORMANCE; BEHAVIOR;
D O I：
10.1016/j.cattod.2008.09.018
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Four nanostructured oxidised copper-cerium catalysts prepared by two different methods (impregnation of ceria and coprecipitation of the two components within reverse microemulsions) with varying copper loadings have been examined with the aim of establishing correlations between redox and catalytic properties for preferential oxidation of CO in H-2-rich streams. The analysis is based on ex situ TPR examination both with H-2 or CO as well as operando spectroscopic exploration by DRIFTS and XANES, additionally complemented by conventional catalytic tests. The results reveal redox promoting effects on copper oxide reduction and allow establishing a model of the catalytic behaviour of this type of catalysts which can provide keys to control their CO-PROX catalytic properties. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：211 / 217
页数：7
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