Galvanic replacement synthesis of Ag _x Au_1-x @CeO₂ (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance.

ABSTRACT: A galvanic replacement strategy has been successfully adopted to design Ag _x Au_1-x @CeO₂ core@shell nanospheres derived from Ag@CeO₂ ones. After etching using HAuCl₄, the Ag core was in situ replaced with Ag _x Au_1-x alloy nanoframes, and void spaces were left under the CeO₂ shell. Among the as-prepared Ag _x Au_1-x @CeO₂ catalysts, Ag_0.64Au_0.36@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, Ag

SUBMITTER: Liu D 

PROVIDER: S-EPMC5532536 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature