Journal
TOPICS IN CATALYSIS
Volume 54, Issue 5-7, Pages 415-423Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-011-9672-3
Keywords
O-2 adsorption; O-2 dissociation; CO oxidation; Au clusters; DFT; Gold
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Funding
- National Computer Facilities NCF [SH-034-08]
- Pakistan Higher Education Commission (HEC)
- Sasol Technology RD, South Africa
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We calculate the energetics of CO oxidation on extended surfaces of particular structures chosen to maximize their reactivity towards either O-2 dissociation, after which CO + O to CO2 is a facile reaction, or to CO2 from molecular O-2 and CO. We identified two configurations of Au atoms for which the energetics of these reactions are feasible. A site consisting of four Au atoms in a square geometry appears well suited for dissociating oxygen. A Au-38 cluster exposing this site provides the most favourable energetics for the CO oxidation.
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