Redox chemistry of gold in a Au/FeOx/CeO2 CO oxidation catalyst

Penkova, A.; Laguna Espitia, Oscar Hernando

doi:doi:10.1016/j.catcom.2009.01.014

ART02 AuCeFe Catal Commun 2009.pdf (939.3Kb)

Identificadores

URI: https://hdl.handle.net/10481/87153

DOI: doi:10.1016/j.catcom.2009.01.014

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Editorial

Elsevier

Materia

Gold catalysts

Au/FeOx/CeO2

CO oxidation

Fecha

2009-01-20

Referencia bibliográfica

A. Penkova, K. Chakarova, O.H. Laguna, K. Hadjiivanov, F.R. Saria, M.A. Centeno, J.A. Odriozola, Redox chemistry of gold in a Au/FeOx/CeO2 CO oxidation catalyst, Catalysis Communications, 10 (2009) 1196-1202

Patrocinador

Proyecto bilateral España - Bulgaria CSIC/BAS (2004BG001); Apoyo de la Junta de Andalucía al grupo TEP106; Bulgarian Scientific Foundation - Project VUX-303; Ministerio de Educación y Ciencia a través del contrato Juan de la Cierva de Anna Dimitrova Penkova

Resumen

Calcination and evacuation of a Au/FeOx/CeO2 catalyst at 573 K leads to reduction of the deposited gold to metal. This metal state is stable under oxygen and only at 573 K some metal atoms are oxidized to Auδ+ sites (Au+ cations situated on metal gold particles). However, even at room temperature, gold is readily oxidized in a CO + O2 mixture producing, in addition to the Auδ+ sites, some isolated Au+ cations.

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