期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 130, 期 -, 页码 224-238出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2012.11.008
关键词
Nanostructured CuO-CeO2 catalysts; CO-PROX; HREM; EPR; TPR; Operando-DRIFTS; XPS; Raman; XRD
资金
- Ministerio de Economia y Competitividad [CTQ2009-14527, CTQ2011-25517, CTQ2012-32928]
- Comunidad de Madrid (Project DIVERCEL) [S2009/ENE-1475]
- EU COST action [CM1104]
- CSIC JAE program
- Ministerio de Ciencia e Innovacion FPI program
- Ministerio de Ciencia e Innovacion
A series of oxidised copper-cerium nanostructured catalysts prepared by impregnation of copper over ceria supports synthesized by different methods (hydrothermal with varying preparation parameters, microemulsion/precipitation), in order to achieve different specific morphologies (nanocubes, nanorods and nanospheres), have been examined with respect to their catalytic properties for preferential oxidation of CO in excess H-2 (CO-PROX). The catalysts have been characterized in detail by XRD, Raman, S-BET measurement, HREM, XPS, TPR and EPR, which allows establishing a model of structural characteristics of the catalysts. The characterization results have been correlated with analysis of CO-PROX catalytic properties by means of catalytic activity measurements complemented by operando-DRIFTS. Structural dependence of the CO oxidation reaction on the dispersed copper oxide entities as a function of the exposed face present at the surface of the different ceria supports is revealed. An important overall enhancement of the CO-PROX performance is detected for the sample supported on ceria nanocubes which is proposed to be a consequence of the interaction between copper oxide and (1 0 0) faces of the ceria support. (c) 2012 Elsevier B.V. All rights reserved.
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