Abstract
The supported Au nanoparticles have been regarded as promising catalysts for CO oxidation but still suffer from unsatisfactory catalytic activity and durability. Herein, we show a simple and efficient strategy to simultaneously enhance the catalytic activity and durability for CO oxidation. Key to the success is modification of the supported Au nanoparticle catalyst with nanosized CeOx to construct abundant Au-CeOx interface. Owing to the maximized interfacial effect on the CeOx-modified Au nanoparticles, the concentration of positively-charged Au species (Auδ+) was remarkably improved, leading to enhanced catalytic activities in the oxidation of CO. Importantly, the stability of Au nanoparticles is remarkably increased by CeOx modification, exhibiting good durability in a continuous test of CO oxidation at higher temperatures.
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