Galvanic replacement synthesis of AgxAu1-x@CeO2 (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance

被引：29

作者：

Liu, Dapeng ^{[1
]}

Li, Wang ^{[1
]}

Feng, Xilan ^{[1
]}

Zhang, Yu ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Chem & Environm, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China

[2] Beihang Univ, Int Res Inst Multidisciplinary Sci, Beijing 100191, Peoples R China

来源：

CHEMICAL SCIENCE | 2015年 / 6卷 / 12期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

METAL-ORGANIC FRAMEWORK; FACILE SYNTHESIS; NANOPARTICLES; NANOSTRUCTURES; ALLOY; ACID;

D O I：

10.1039/c5sc02774h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A galvanic replacement strategy has been successfully adopted to design AgxAu1-x@CeO2 core@shell nanospheres derived from Ag@CeO2 ones. After etching using HAuCl4, the Ag core was in situ replaced with AgxAu1-x alloy nanoframes, and void spaces were left under the CeO2 shell. Among the as-prepared Ag(x)Au(1-)x@CeO2 catalysts, Ag0.64Au0.36@CeO2 shows the optimal catalytic performance, whose catalytic efficiency reaches even 2.5 times higher than our previously reported Pt@CeO2 nanospheres in the catalytic reduction of 4-nitrophenol (4-NP) by ammonia borane (AB). Besides, Ag0.64Au0.36@CeO2 also exhibits a much lower 100% conversion temperature of 120 degrees C for catalytic CO oxidation compared with the other samples.

引用

页码：7015 / 7019

页数：5

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