Published in
Elsevier, Catalysis Communications, 8(10), p. 1196-1202, 2009
DOI: 10.1016/j.catcom.2009.01.014
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Redox chemistry of gold in a Au/FeO /CeO2 CO oxidation catalyst
Journal article published in 2009 by
A. Penkova 
,
K. Chakarova,
O. H. Laguna,
K. Hadjiivanov,
F. Romero Saria,
M. A. Centeno,
J. A. Odriozola
,
K. Chakarova,
O. H. Laguna,
K. Hadjiivanov,
F. Romero Saria,
M. A. Centeno,
J. A. Odriozola
This paper is made freely available by the publisher.
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Abstract
Calcination and evacuation of a Au/FeOx/CeO2 catalyst at 573K leads to reduction of the deposited gold to metal. This metal state is stable under oxygen and only at 573K 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.