Atomic layer deposition assisted Pt-SnO2 hybrid catalysts on nitrogen-doped CNTs with enhanced electrocatalytic activities for low temperature fuel cells

被引：59

作者：

Chen, Yougui ^{[1
]}

Wang, Jiajun ^{[1
]}

Meng, Xiangbo ^{[1
]}

Zhong, Yu ^{[1
]}

Li, Ruying ^{[1
]}

Sun, Xueliang ^{[1
]}

Ye, Siyu ^{[2
]}

Knights, Shanna ^{[2
]}

机构：

[1] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada

[2] Ballard Power Syst Inc, Burnaby, BC V5J 5J8, Canada

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 17期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

Pt; SnO2; Nitrogen-doped carbon nanotube; Fuel cell; Atomic layer deposition; OXYGEN REDUCTION REACTION; PLATINUM NANOPARTICLES; CARBON NANOTUBES; OXIDATION; SNO2; ETHANOL; PERFORMANCE; SURFACE; CO; COMPOSITE;

D O I：

10.1016/j.ijhydene.2011.05.156

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：

Nitrogen doped carbon nanotubes (CNx) of a high nitrogen concentration were synthesized directly on carbon paper as the skeleton of a 3D composite electrode. Ultra-fine SnO2 nanoparticles about 1.5 nm were deposited on CNx with atomic layer deposition (ALD) technique. Pt nanoparticles from 1.5 to 4 nm were deposited on CNx/carbon paper and SnO2/CNx/carbon paper with ethylene glycol reduction method. Three dimensional Pt/CNx/carbon paper and Pt-SnO2/CNx/carbon paper composite electrodes were obtained, respectively. They were characterized over oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) for low temperature fuel cells. With similar sizes of Pt nanoparticles, the electrochemical surface area (ECSA) of Pt-SnO2/CNx/carbon paper is larger than that of Pt/CNx/carbon paper. Pre-deposited SnO2 nanoparticles promote the electrocatalytic activity of Pt toward ORR, carbon monoxide (CO) stripping and MOR. The underlying mechanisms for the enhanced activities are discussed. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：11085 / 11092

页数：8

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