A ternary Pt/MnO2/graphene nanohybrid with an ultrahigh electrocatalytic activity toward methanol oxidation

被引：70

作者：

Huang, Huajie ^{[1
,2
]}

Chen, Qun ^{[2
]}

He, Mingyang ^{[2
]}

Sun, Xiaoqiang ^{[2
]}

Wang, Xin ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China

[2] Changzhou Univ, Key Lab Fine Petrochem Engn, Changzhou 213164, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2013年 / 239卷

关键词：

Graphene; Manganese dioxide; Platinum nanoparticles; Direct methanol fuel cells; HIGH-PERFORMANCE ELECTROCATALYST; PD BIMETALLIC NANODENDRITES; WALLED CARBON NANOTUBES; REDUCED GRAPHENE OXIDE; ALLOY NANOPARTICLES; PT-RU; ELECTROOXIDATION; CATALYSTS; NANOCOMPOSITE; MNO2;

D O I：

10.1016/j.jpowsour.2013.03.133

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：

Ultrafine Pt nanoparticles with an average diameter of only 1.7 nm are uniformly dispersed onto MnO2-functionalized graphene sheets by a facile and cost-effective method. In such a ternary Pt/MnO2/graphene sheets (Pt/MnO2/GS) nanohybrid, each component provides unique and critical function to achieve optimized utilization of metallic platinum, allowing it to express ultrahigh electrocatalytic activity ability in methanol oxidation (the forward anodic peak current density is up to 1224 mA mg(-1)) in comparison with Pt/graphene sheets (Pt/GS), Pt/Vulcan XC-72 (Pt/XC-72) and Pt/MnO2/XC-72 catalysts. This work could provide new insights into the fabrication of the next generation high-performance electrocatalyst and promote their practical application in fuel-cell technologies. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：189 / 195

页数：7

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