High loading of Pt-Ru nanocatalysts by pentagon defects introduced in a bamboo-shaped carbon nanotube support for high performance anode of direct methanol fuel cells

被引：32

作者：

Gan, Lin ^{[1
,2
]}

Lv, Ruitao ^{[1
]}

Du, Hongda ^{[2
]}

Li, Baohua ^{[2
]}

Kang, Feiyu ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Adv Mat Lab, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Lab, Shenzhen 518055, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 02期

关键词：

Direct methanol fuel cells; Catalyst support; Carbon nanotubes; Pentagon defects; Pt-Ru catalysts; High loading; CATALYST; NANOPARTICLES;

D O I：

10.1016/j.elecom.2008.11.040

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Bamboo-shaped carbon nanotubes (BCNTs), with a large amount of pentagon defects introduced in the walls, were explored as the support of high loaded Pt-Ru catalysts for the anode of direct methanol fuel cells (DMFCs) in comparison with conventional carbon nanotubes (CNTs) and Vulcan XC carbon black. By ethylene glycol reduction, Pt-Ru catalysts with a high loading (60 wt%) and uniform particle size of 23 nm were uniformly deposited on BCNTs: while 60 wt% Pt-Ru catalysts on CNTs resulted in significant agglomeration. The Pt-Ru/BCNT catalyst showed the highest activity on methanol oxidation in cyclic voltammetry and highest performance as the anode in a DMFC single cell. Such an enhancement was largely ascribed to an enhanced interaction of the introduced pentagon defects with Pt-Ru, which could promote a high loading and well dispersion of Pt-Ru catalysts and the charge transfer from Pt-Ru to the tubes. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：355 / 358

页数：4

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