Controlling core/shell Au/FePt nanoparticle electrocatalysis via changing the core size and shell thickness
Controlling core/shell Au/FePt nanoparticle electrocatalysis via changing the core size and shell thickness
复制标题
通过改变核尺寸和壳厚度控制核/壳 Au/FePt 纳米粒子电催化
DOI：
10.1039/c5nr06492a
复制
发表时间：
2016
期刊：
影响因子：
6.7
通讯作者：
Sun Shouheng
中科院分区：
文献类型：
--
作者：
Sun Xiaolian;Li Dongguo;Guo Shaojun;Zhu Wenlei;Sun Shouheng
Using a modified seed-mediated method, we synthesized core/shell Au/FePt nanoparticles (NPs) with Au sizes of 4, 7, and 9 nm and the FePt shell was controlled to have similar FePt compositions and 0.5, 1, and 2 nm thickness. We studied both core and shell effects on electrochemical and electrocatalytic properties of the Au/FePt NPs, and found that the Au core did change the redox chemistry of the FePt shell and promoted its electrochemical oxidation of methanol. The catalytic activity was dependent on the FePt thicknesses, but not much on the Au core sizes, and the 1 nm FePt shell was found to be the optimal thickness for catalyzing methanol oxidation in 0.1 M HClO4 + 0.1 M methanol, offering not only high activity (1.19 mA cm−2 at 0.5 V vs. Ag/AgCl), but also enhanced stability. Our studies demonstrate a general approach to the design and tuning of shell catalysis in the core/shell structure to achieve optimal catalysis for important electrochemical reactions.
