Issue 12, 2015

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

Abstract

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 AgxAu1−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 °C for catalytic CO oxidation compared with the other samples.

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

Supplementary files

Article information

Article type
Edge Article
Submitted
29 júl. 2015
Accepted
07 sep. 2015
First published
07 sep. 2015
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2015,6, 7015-7019

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

D. Liu, W. Li, X. Feng and Y. Zhang, Chem. Sci., 2015, 6, 7015 DOI: 10.1039/C5SC02774H

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