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

页码：155 / 160

页数：6

共 28 条

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