Enhancement of the activity and durability in CO oxidation over silica-supported Au nanoparticle catalyst via CeOx modification

doi:10.1016/S1872-2067(18)63136-5

Abstract

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 CeO_x to construct abundant Au-CeO_x interface. Owing to the maximized interfacial effect on the CeO_x-modified Au nanoparticles, the concentration of positively-charged Au species (Au^δ+) was remarkably improved, leading to enhanced catalytic activities in the oxidation of CO. Importantly, the stability of Au nanoparticles is remarkably increased by CeO_x modification, exhibiting good durability in a continuous test of CO oxidation at higher temperatures.

Key words: CO oxidation, Gold, Cerium oxide, Interface, Sinter resistance

Lingxiang Wang, Liang Wang, Jian Zhang, Hai Wang, Feng-Shou Xiao. Enhancement of the activity and durability in CO oxidation over silica-supported Au nanoparticle catalyst via CeO_x modification[J]. Chinese Journal of Catalysis, 2018, 39(10): 1608-1614.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(18)63136-5

https://www.cjcatal.com/EN/Y2018/V39/I10/1608

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Enhancement of the activity and durability in CO oxidation over silica-supported Au nanoparticle catalyst via CeO_x modification

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