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Iron-modified ceria and Au/ceria catalysts for Total and Preferential Oxidation of CO (TOX and PROX)

Opened Access Iron-modified ceria and Au/ceria catalysts for Total and Preferential Oxidation of CO (TOX and PROX)

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Autor: Laguna Espitia, Oscar Hernando
Centeno Gallego, Miguel Ángel
Arzamendi, Gurutze
Gandía, Luis María
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2010
Publicado en: Catalysis Today, 157, 155-159.
Tipo de documento: Artículo
Resumen: Iron-modified ceria supports containing different molar percentages of Fe (0%, 10%, 25%, and 50%) were synthesized by thermal decomposition of the metal propionates. The formation of a Ce-Fe oxide solid solution is evidenced through XRF, XRD, BET and Raman spectroscopy. For iron contents above 25% the formation of ¿-Fe2O3 was detected, pointing out the formation of the isolated oxides. The catalytic activity of the Fe-modified catalysts in the Total Oxidation of CO reaction (TOX) is higher than for the bare CeO 2 material. The synergy between Ce and Fe shows a maximum for 10% Fe content (CeFe10), catalyst that shows the highest CO conversion per atom of Fe incorporated. Gold catalyst was also prepared on CeFe10 and its catalytic activity compared with Au/CeO2 catalyst. The addition of iron to the gold catalyst resulted in an enhancement of the catalytic activity for CO oxidation especially at low temperature. This Au/CeFe10 catalyst was also active and selective with excellent stabili...
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Cita: Laguna Espitia, O.H., Centeno Gallego, M.Á., Arzamendi, G., Gandía, L.M., Romero Sarria, F. y Odriozola Gordón, J.A. (2010). Iron-modified ceria and Au/ceria catalysts for Total and Preferential Oxidation of CO (TOX and PROX). Catalysis Today, 157, 155-159.
Tamaño: 185.0Kb
Formato: PDF

URI: https://hdl.handle.net/11441/71514

DOI: 10.1016/j.cattod.2010.04.011

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