MnO2/CNT Supported Pt and PtRu Nanocatalysts for Direct Methanol Fuel Cells

被引：172

作者：

Zhou, Chunmei ^{[1
]}

Wang, Hongjuan ^{[1
]}

Peng, Feng ^{[1
]}

Liang, Jiahua ^{[1
]}

Yu, Hao ^{[1
]}

Yang, Jian ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China

来源：

LANGMUIR | 2009年 / 25卷 / 13期

关键词：

HYDROUS RUTHENIUM OXIDE; POLYOL-SYNTHESIZED PTRU/C; CARBON NANOTUBES; ELECTROCHEMICAL PROPERTIES; ANODE CATALYSTS; IN-SITU; OXIDATION; NANOPARTICLES; ELECTROOXIDATION; CONDUCTIVITY;

D O I：

10.1021/la900250w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pt/MnO2/carbon nanotube (CNT) and PtRu/MnO2/CNT nanocomposites were synthesized by successively loading hydrous MnO2 and Pt (or PtRu alloy) nanoparticles on CNTs and were used as anodic catalysts for direct methanol fuel cells (DMFCs). The existence of MnO2 Oil the surface of CNTs effectively increases the proton conductivity of the catalyst, which then could remarkably improve the performance of the catalyst in methanol electro-oxidation. As a result, Pt/MnO2/CNTs show higher electrochemical active surface area and better methanol electro-oxidation activity, compared with Pt/CNTs. As PtRu alloy nanoparticles were deposited oil the surface of MnO2/CNTs instead of Pt. the PtRu/MnO2/CNT catalyst shows not only excellent electro-oxidation activity to methanol with forward anodic peak current density of 901 A/g(Pt) but also good CO oxidation ability with lower preadsorbed CO oxidation onset potential (0.33 V vs Ag/AgCl) and peak potential (0.49 V vs Ag/AgCl) at room temperature.

引用

页码：7711 / 7717

页数：7

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