%0 Journal Article 
%A Gamarra, D.
%A López Cámara, A.
%A Rasmussen, S.B.
%A Chinchilla, L.E.
%A Hungría Hernández, Ana Belén
%A Munuera, G.
%A Gyorffy, N.
%A Schay, Z.
%A Cortés Corberán, V.
%A Conesa, J.C.
%A Martínez-Arias, A.
%T 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
%D 2012
%@ 0926-3373
%U http://hdl.handle.net/10498/15868
%X 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 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.
%K Nanostructured CuO-CeO2 catalysts
%K CO-PROX
%K HREM
%K EPR
%K TPR
%K Opernado-DRIFTS
%K XPS
%K XRD
%~ Universidad de Cádiz