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Title: Gold clusters on Nb-doped SrTiO 3: Effects of metal-insulator transition on heterogeneous Au nanocatalysis
Authors: Zhou, M.
Feng, Y.P. 
Zhang, C. 
Issue Date: 21-Jul-2012
Citation: Zhou, M., Feng, Y.P., Zhang, C. (2012-07-21). Gold clusters on Nb-doped SrTiO 3: Effects of metal-insulator transition on heterogeneous Au nanocatalysis. Physical Chemistry Chemical Physics 14 (27) : 9660-9665. ScholarBank@NUS Repository.
Abstract: Doping induced metal-insulator transition (MIT) in transition-metal (TM) oxides has been the topic of continued interest outside the field of catalysis chemistry. In this paper, via ab initio (GGA+U) calculations, we show that Nb-doping induced MIT in SrTiO 3 causes a dimensionality crossover of supported Au clusters, and at the same time, greatly enhances the stability and catalytic activity of these clusters. Underlying the predicted high catalytic activity of Au clusters towards the CO oxidation is the MIT induced interaction between the O 2 antibonding 2π* orbital and Au conduction bands, leading to a shift in the population of electrons from Au to the antibonding orbital and the activation of the O 2 molecule. We expect these results to provide a new methodology for the control of catalytic performance of TM-oxide supported Au nanoclusters. This journal is © the Owner Societies.
Source Title: Physical Chemistry Chemical Physics
ISSN: 14639076
DOI: 10.1039/c2cp40939a
Appears in Collections:Staff Publications

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