Self-assembly of Pt nanoparticles on highly graphitized carbon nanotubes as an excellent oxygen-reduction catalyst

被引：99

作者：

Zhang, Sheng ^{[1
,2
]}

Shao, Yuyan ^{[2
]}

Yin, Geping ^{[1
]}

Lin, Yuehe ^{[2
]}

机构：

[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Sch Chem Engn & Technol, Harbin 150001, Peoples R China

[2] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 102卷 / 3-4期

关键词：

Fuel cells; Graphitized carbon nanotubes; Electrocatalyst; Oxygen reduction; Durability; Self-assembly; METHANOL FUEL-CELLS; FORMIC-ACID OXIDATION; MESOPOROUS CARBON; ALLOY NANOPARTICLES; SUPPORTED PLATINUM; PTRU NANOPARTICLES; ELECTROCATALYSTS; DURABILITY; CATHODE; PT/C;

D O I：

10.1016/j.apcatb.2010.11.029

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：

Platinum nanoparticles/graphitic carbon nanotubes (GCNTs) nanocomposites are fabricated with electrostatic self-assembly technology. Pt precursors are uniformly distributed on poly(diallyldimethylammonium chloride)-functionalized GCNTs surface (PDDA-GCNTs) via the electrostatic interaction and then in situ reduced to Pt nanoparticles in ethylene glycol, where PDDA is not only used as the wrapping polymer for GCNTs to preserve the integrity and the electronic structure of GCNTs, but also facilitates the uniform distribution of Pt nanoparticles on the surface of GCNTs. X-ray diffraction patterns and transmission electron microscope images reveal that Pt nanoparticles with an average size of similar to 2.7 nm are uniformly dispersed on highly graphitized GCNTs. Significant enhancement in the electrocatalytic activity on Pt/PDDA-GCNTs catalyst towards oxygen reduction reaction (ORR) has been demonstrated. In addition, this catalyst also shows enhanced electrochemical durability due to the high graphitization degree of GCNTs. This provides a facile and eco-friendly approach to large-scale production of high performance fuel cell eletrocatalysts. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：372 / 377

页数：6

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