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Synergy between gold and oxygen vacancies in gold supported on Zr-doped ceria catalysts for the CO oxidation

Opened Access Synergy between gold and oxygen vacancies in gold supported on Zr-doped ceria catalysts for the CO oxidation

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Autor: Laguna Espitia, Oscar Hernando
Pérez Flores, Alejandro
Centeno Gallego, Miguel Ángel
Odriozola Gordón, José Antonio
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2015
Publicado en: Applied Catalysis B: Environmental, 176, 375-385.
Tipo de documento: Artículo
Resumen: The CO oxidation activity of 1 wt.% gold catalysts prepared by depositionprecipitation on a series of ceria doped with Zr supports was studied. The supports (10, 25 and 50 Zr At. %) were synthesized by a pseudo sol-gel method through the thermal decomposition of the corresponding metallic propionates. All the prepared solids were characterized by means of XRF, BET, XRD, Raman spectroscopy, SEM, and H2-TPR. Solid solution was obtained in all mixed systems, while the segregation of different Ce-Zr oxides was observed for the solid with the 50 Zr At. %. The oxygen vacancies population and the amount of easier reducible Ce4+ species in the solids increase with the Zr content. No major textural or structural modifications were detected after gold deposition, although a strong Au-support interaction was generated. Such interaction is strongly influenced by the nucleation of gold deposits on the oxygen vacancies and consequently the amount of Zr inserted in the ceria network also determines ...
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Cita: Laguna Espitia, O.H., Pérez Flores, A., Centeno Gallego, M.Á. y Odriozola Gordón, J.A. (2015). Synergy between gold and oxygen vacancies in gold supported on Zr-doped ceria catalysts for the CO oxidation. Applied Catalysis B: Environmental, 176, 375-385.
Tamaño: 650.3Kb
Formato: PDF

URI: https://hdl.handle.net/11441/72276

DOI: 10.1016/j.apcatb.2015.04.019

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