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CO oxidation at low temperature on Au/CePO4: Mechanistic aspects

Opened Access CO oxidation at low temperature on Au/CePO4: Mechanistic aspects

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Autor: Romero Sarria, Francisca
Domínguez Leal, María Isabel
Centeno Gallego, Miguel Ángel
Odriozola Gordón, José Antonio
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2011
Publicado en: Applied Catalysis B: Environmental, 107, 268-273.
Tipo de documento: Artículo
Resumen: This work reports the synthesis and characterization of a cerium phosphate supported gold catalyst as well as its catalytic activity for the oxidation of CO. A precipitation method in the presence of an organic modifier followed by a hydrothermal treatment was used for the support synthesis, resulting in high surface area nanometric particles. Gold/cerium phosphate catalyst with a 1% (w/w) nominal gold content was characterized using XRF, XRD, N2 adsorption-desorption measurements, TEM and DRIFTS-MS. The catalyst shows good catalytic activity at low temperature. The activity is related to the generation of oxygen vacancies in the support caused by the elimination of structural oxygen. In situ studies revealed that the reaction of the oxygen vacancies with gaseous oxygen resulted in the formation of peroxo species. These species are responsible for the activity detected at room temperature in both the catalyst and the support. Moreover, the presence of carbonate and hydrogen carbonate ...
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Cita: Romero Sarria, F., Domínguez Leal, M.I., Centeno Gallego, M.Á. y Odriozola Gordón, J.A. (2011). CO oxidation at low temperature on Au/CePO4: Mechanistic aspects. Applied Catalysis B: Environmental, 107, 268-273.
Tamaño: 464.1Kb
Formato: PDF

URI: https://hdl.handle.net/11441/82828

DOI: 10.1016/j.apcatb.2011.07.022

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