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Artículo
Oxidation of CO over gold supported on Zn-modified ceria catalysts
dc.creator | Laguna Espitia, Oscar Hernando | es |
dc.creator | Centeno Gallego, Miguel Ángel | es |
dc.creator | Romero Sarria, Francisca | es |
dc.creator | Odriozola Gordón, José Antonio | es |
dc.date.accessioned | 2017-12-28T15:26:15Z | |
dc.date.available | 2017-12-28T15:26:15Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Laguna Espitia, O.H., Centeno Gallego, M.Á., Romero Sarria, F. y Odriozola Gordón, J.A. (2011). Oxidation of CO over gold supported on Zn-modified ceria catalysts. Catalysis Today, 172, 118-123. | |
dc.identifier.issn | 0920-5861 (impreso) | es |
dc.identifier.uri | http://hdl.handle.net/11441/68066 | |
dc.description.abstract | 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 surface. However, the number of oxygen vacancies acting as nucleation sites for gold, is hardly modified in the Zn-modified ceria support and, therefore, the higher gold dispersion must be related to high electron density sites on the catalyst surface as a result of Au-Ce-Zn interaction, this improved gold dispersion results in higher activities for CO oxidation. | es |
dc.description.sponsorship | Ministerio de Ciencia e Innovación ENE2009-14522-C05-01 | es |
dc.description.sponsorship | Junta de Andalucía P09-TEP-5454 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Catalysis Today, 172, 118-123. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Gold catalysts | es |
dc.subject | Zn-modified Ceria | es |
dc.subject | CO oxidation | es |
dc.subject | Oxygen vacancies | es |
dc.title | Oxidation of CO over gold supported on Zn-modified ceria catalysts | es |
dc.type | info:eu-repo/semantics/article | es |
dc.type.version | info:eu-repo/semantics/acceptedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Química Inorgánica | es |
dc.relation.projectID | ENE2009-14522-C05-01 | es |
dc.relation.projectID | P09-TEP-5454 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.cattod.2011.02.015 | es |
dc.identifier.doi | 10.1016/j.cattod.2011.02.015 | es |
idus.format.extent | 28 p. | es |
dc.journaltitle | Catalysis Today | es |
dc.publication.volumen | 172 | es |
dc.publication.initialPage | 118 | es |
dc.publication.endPage | 123 | es |
dc.contributor.funder | Ministerio de Ciencia e Innovación (MICIN). España | |
dc.contributor.funder | Junta de Andalucía |