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Oxidation of CO over gold supported on Zn-modified ceria catalysts

Opened Access Oxidation of CO over gold supported on Zn-modified ceria catalysts


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Autor: Laguna Espitia, Oscar Hernando
Centeno Gallego, Miguel Ángel
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2011
Tipo de documento: Artículo
Resumen: A series of Zn-modified ceria solids were prepared by thermal decomposition of the corresponding metal propionates. The formation of segregated ZnO particles on the ceria surface is evidenced for these solids using X-ray diffraction; in addition to this the characterization data may allow discarding the formation of a ZnO¿CeO2 solid solution. On modifying with Zn, the reducibility of the ceria support is enhanced, being the highest reducibility the one obtained for the ZnO¿CeO2 solid having a 1:9 Zn:Ce atomic ratio (CeZn10). The activity of this solid in the CO oxidation reaction was the highest among the tested Zn-modified ceria solids. Therefore, catalysts containing 1 wt.% gold, supported on pure ceria and CeZn solids, were prepared, characterized and their catalytic activities tested. The Zn-modified gold catalyst is more active than the un-modified Au/CeO2 catalyst in the oxidation of CO; this behavior is related to the higher metallic dispersion of gold on the CeZn support surfa...
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Tamaño: 375.6Kb
Formato: PDF


DOI: 10.1016/j.cattod.2011.02.015

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