When Gold Is Not Noble: Nanoscale Gold Catalysts
摘要：
While inert as bulk material, nanoscale gold particles dispersed on oxide supports exhibit a remarkable catalytic activity. Temperature-programmed reaction studies of the catalyzed combustion of CO on size-selected small monodispersed Au{sub n} (n {le} 20) gold clusters supported on magnesia, and first-principle simulations, reveal the microscopic origins of the observed unusual catalytic activity, with Au{sub 8} found to be the smallest catalytically active size. Partial electron transfer from the surface to the gold cluster and oxygen-vacancy F-center defects are shown to play an essential role in the activation of nanosize gold clusters as catalysts for the combustion reaction.
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关键词：
environmental sciences gold catalytic effects magnesium oxides combustion carbon monoxide air pollution control
DOI：
10.1021/jp9935992
被引量：
年份：
1999
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