具有大大增强催化性能的Ag Au @CeO（0≤≤1）核壳纳米球的电置换合成。

Galvanic replacement synthesis of Ag Au @CeO (0 ≤ ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance.

作者信息

Liu Dapeng, Li Wang, Feng Xilan, Zhang Yu

机构信息

Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education , School of Chemistry and Environment , Beihang University , Beijing 100191 , China . Email:

International Research Institute for Multidisciplinary Science , Beihang University , Beijing 100191 , P. R. China.

出版信息

Chem Sci. 2015 Dec 1;6(12):7015-7019. doi: 10.1039/c5sc02774h. Epub 2015 Sep 7.

A galvanic replacement strategy has been successfully adopted to design Ag Au @CeO core@shell nanospheres derived from Ag@CeO ones. After etching using HAuCl, the Ag core was replaced with Ag Au alloy nanoframes, and void spaces were left under the CeO shell. Among the as-prepared Ag Au @CeO catalysts, AgAu@CeO shows the optimal catalytic performance, whose catalytic efficiency reaches even 2.5 times higher than our previously reported Pt@CeO nanospheres in the catalytic reduction of 4-nitrophenol (4-NP) by ammonia borane (AB). Besides, AgAu@CeO also exhibits a much lower 100% conversion temperature of 120 °C for catalytic CO oxidation compared with the other samples.