CO Oxidation at the Interface of Au Nanoclusters and the Stepped-CeO2(111) Surface by the Mars–van Krevelen Mechanism

DFT+U calculations of CO oxidation by Au12 nanoclusters supported on a stepped-CeO2(111) surface show that lattice oxygen at the step edge oxidizes CO bound to Au NCs by the Mars–van Krevelen (M-vK) mechanism. We found that CO2 desorption determines the rate of CO oxidation, and the vacancy formatio...

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Published in:The journal of physical chemistry letters 2013-01, Vol.4 (1), p.216-221
Main Authors: Kim, Hyun You, Henkelman, Graeme
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Language:English
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Surfaces, Interfaces, Porous Materials, and Catalysis
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description DFT+U calculations of CO oxidation by Au12 nanoclusters supported on a stepped-CeO2(111) surface show that lattice oxygen at the step edge oxidizes CO bound to Au NCs by the Mars–van Krevelen (M-vK) mechanism. We found that CO2 desorption determines the rate of CO oxidation, and the vacancy formation energy is a reactivity descriptor for CO oxidation. Our results suggest that the M-vK mechanism contributes significantly to CO oxidation activity at Au particles supported on the nano- or meso-structured CeO2 found in industrial catalysts.
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title CO Oxidation at the Interface of Au Nanoclusters and the Stepped-CeO2(111) Surface by the Mars–van Krevelen Mechanism
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