Nanostructured WCx/CNTs as highly efficient support of electrocatalysts with low Pt loading for oxygen reduction reaction

被引：102

作者：

Liang, Changhai ^{[1
,2
]}

Ding, Ling ^{[1
,2
]}

Li, Chuang ^{[1
,2
]}

Pang, Min ^{[1
,2
]}

Su, Dangsheng

Li, Wenzhen ^{[3
]}

Wang, Yuemin ^{[4
]}

机构：

[1] Dalian Univ Technol, State Key Lab Fine Chem, Dalian, Peoples R China

[2] Dalian Univ Technol, Key Lab Micro Nano Technol & Syst Liaoning Prov, Dalian, Peoples R China

[3] Michigan Technol Univ, Dept Chem Engn, Houghton, MI 49931 USA

[4] Ruhr Univ Bochum, Chair Phys Chem 1, Bochum, Germany

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2010年 / 3卷 / 08期

基金：

中国国家自然科学基金;

关键词：

TUNGSTEN CARBIDE MICROSPHERES; CHEMICAL-VAPOR-DEPOSITION; HIGH-RESOLUTION XPS; SURFACE-AREA; METHANOL OXIDATION; CATALYST SUPPORT; HIGH-PERFORMANCE; FUEL-CELLS; CARBON; PLATINUM;

D O I：

10.1039/c001423k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly active Pt-WCx/carbon nanotube (CNT) electrocatalysts for the oxygen reduction reaction (ORR) have been developed by the combination of tungsten carbide with CNTs as electrocatalyst supports. The obtained WCx/CNT and Pt-WCx/CNT samples were characterized by XRD, TEM, XPS and electrochemical measurements. The results showed that nanostructured tungsten carbide particles on carbon nanotubes could be prepared by microwave-assisted thermolytic molecular precursor method, and the particle size of tungsten carbide increased with the increase of tungsten loading. The nanostructured WCx/CNTs showed electrocatalytic activity for oxygen reduction reaction. The deposition of Pt nanoparticles on the WCx/CNTs resulted in higher electrocatalytic activity for the oxygen reduction reaction and better immunity to methanol than Pt/CNT catalysts. The unique electrocatalytic properties of the novel Pt-WCx/CNT electrocatalyst were attributed to a synergistic effect between Pt, WCx and the CNTs. The findings also indicated that WCx/CNTs were efficient electrocatalyst supports that could reduce Pt usage while the same electrocatalytic properties were kept for the ORR in direct methanol fuel cells.

引用

页码：1121 / 1127

页数：7

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