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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Role of gold cations in the oxidation of carbon monoxide catalyzed by iron oxide-supported gold
Journal of Catalysis, Volume 242, No. 1, Year 2006
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Description
Recent intense interest in catalysis by supported gold has focused mainly on the oxidation of CO at low temperatures, which offers the potential for many important applications, including the purification of hydrogen for automotive fuel cells. Numerous, contradictory proposals have been made concerning the nature of the active sites in supported gold catalysts. We now present evidence from a set of complementary experimental methods characterizing Au/α-Fe2O3 catalysts, demonstrating that cationic gold plays a crucial role in catalyzing CO oxidation at 298 K, as well as in the hydrogenation of crotonaldehyde. A series of catalysts based on a co-precipitated 5-wt% Au/Fe2O3 precursor heat treated in different ways were compared for CO oxidation at ambient temperature. The catalysts were structurally and chemically analyzed by HREM and STEM-XEDS. A combination of EXAFS, in situ XANES, XPS, and Mössbauer effect spectroscopy demonstrates the important role of cationic gold in the activity of these iron oxide-supported gold catalysts. © 2006 Elsevier Inc. All rights reserved.
Authors & Co-Authors
Hutchings, Graham John
United Kingdom, Cardiff
Cardiff University
Carley, Albert F.
United Kingdom, Cardiff
Cardiff University
Landon, Philip
United Kingdom, Cardiff
Cardiff University
Solsona, B. E.
United Kingdom, Cardiff
Cardiff University
Kiely, Christopher J.
United States, Bethlehem
Lehigh University
Moulijn, Jacob A.
Unknown Affiliation
Gates, Bruce C.
United States, Davis
University of California, Davis
Statistics
Citations: 310
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.1016/j.jcat.2006.06.001
ISSN:
10902694
Research Areas
Environmental