Carbon-supported Ag@Pt core-shell nanoparticles with enhanced electrochemical activity for methanol oxidation and oxygen reduction reaction

被引：75
作者：
Cao, Jianyu [1 ,2 ]
Guo, Mengwei [1 ]
Wu, Jinyan [1 ]
Xu, Juan [1 ,2 ]
Wang, Wenchang [1 ]
Chen, Zhidong [2 ]
机构：
[1] Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Changzhou 213164, Peoples R China
[2] Changzhou Univ, Key Lab Solar Cell Mat & Technol Jiangsu Prov, Changzhou 213164, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2015年 / 277卷
基金：
中国国家自然科学基金;
关键词：
Core-shell nanoparticles; Electrocatalyst; Methanol oxidation; Oxygen reduction reaction; FUEL-CELLS; PLATINUM NANOPARTICLES; PARTICLE-SIZE; ELECTROCATALYST; DURABILITY; CATALYST; PERFORMANCE; ELECTRODE; PD;
D O I：
10.1016/j.jpowsour.2014.12.017
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Carbon-supported Ag@Pt core-shell nanoparticles with different Ag/Pt ratios are successfully prepared via a facile stepwise reduction approach and used as electrocatalysts for direct methanol fuel cell (DMFC). The nanostructured Pt shells on the Ag core are confirmed by high-resolution transmission electron microscopy (HRTEM). Electrochemical studies reveal that such Ag@Pt core-shell catalysts possess higher electrocatalytic activities for both methanol oxidation and oxygen reduction reaction (ORR) in comparison to the commercial Pt/C, which may be attributed to high utilization of Pt resulted from the formation of core-shell structure and the appropriate size of core-shell Ag@Pt particles (similar to 3.0 nm). (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：155 / 160
页数：6
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