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Title

Preferential oxidation of CO in excess H2 over CuO/CeO2 catalysts: characterization and performance as a function of the exposed face present in the CeO2 support

AuthorsGamarra Sánchez, Daniel ; López Cámara, Antonio ; Monte Caballero, Manuel ; Chinchilla, Lidia E.; Hungría, Ana B. ; Munuera, Guillermo; Gyorffy, Nóra; Schay, Zoltán; Cortés Corberán, Vicente ; Conesa Cegarra, José Carlos ; Martínez Arias, Arturo
KeywordsRaman
XRD
XPS
Operando-DRIFTS
TPR
Nanostructured CuO-CeO2 catalysts
CO-PRO
XHREM
EPR
Issue Date2013
PublisherElsevier
CitationApplied Catalysis B: Environmental 130-131: 224-238 (2013)
AbstractA 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 H2 (CO-PROX). The catalysts have been characterized in detail by XRD, Raman, SBET 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.
Publisher version (URL)https://doi.org/10.1016/j.apcatb.2012.11.008
URIhttp://hdl.handle.net/10261/182343
DOI10.1016/j.apcatb.2012.11.008
ISSN0926-3373
Appears in Collections:(ICP) Artículos
(ICMS) Artículos
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