Effect of cobalt on the activity of CuO/Ce[O.sub.2] catalyst for the selective oxidation of CO

In this work effect of cobalt on catalyst CuO/ Ce[O.sub.2] activity in selective CO oxidation in [H.sub.2]-containing gases mixture was investigated. Catalysts were prepared by wet impregnation and calcination at 673 K, characterized by ICP, [H.sub.2]-TPR, XRD, TEM, BET and XPS. The addition of coba...

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Bibliographic Details
Published in:Catalysis letters 2010-02, Vol.134 (3-4), p.196
Main Authors: Lendzion-Bielun, Z, Bettahar, M.M, Monteverdi, S, Moszynski, D, Narkiewicz, U
Format: Article
Language:English
Subjects:
Chemical properties
Nonferrous metals
Oxidation-reduction reaction
Online Access:Get full text
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Summary:In this work effect of cobalt on catalyst CuO/ Ce[O.sub.2] activity in selective CO oxidation in [H.sub.2]-containing gases mixture was investigated. Catalysts were prepared by wet impregnation and calcination at 673 K, characterized by ICP, [H.sub.2]-TPR, XRD, TEM, BET and XPS. The addition of cobalt to Cu/Ce[O.sub.2] catalyst improved the catalytic activity and selectivity for CO oxidation. Discussion of the results showed that the synergistic effect is correlated to better dispersion and reducibility of copper in the presence of the cobalt metal additive. More precisely, cobalt enhanced the segregation of copper phase towards the catalyst surface and copper enhanced CO oxidation at the expense of [H.sub.2] combustion.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-009-0257-8