Pt-SnO2/nitrogen-doped CNT hybrid catalysts for proton-exchange membrane fuel cells (PEMFC): Effects of crystalline and amorphous SnO2 by atomic layer deposition

被引：43

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：

JOURNAL OF POWER SOURCES | 2013年 / 238卷

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; Carbon nanotube; Proton-exchange membrane fuel cell; Atomic layer deposition; ELECTROCATALYSTS; DURABILITY; CARBON; STABILIZATION; NANOPARTICLES; STABILITY; NANOTUBES; PT/C;

D O I：

10.1016/j.jpowsour.2013.03.093

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：

SnO2 and Pt nanoparticles were deposited on nitrogen-doped CNT (CNx) in sequence to construct a Pt-SnO2/CNx hybrid electrocatalyst for proton-exchange membrane fuel cells (PEMFC). Crystalline and amorphous SnO2 were deposited selectively by controlling the temperature via atomic layer deposition method. The electrochemical stability of Pt catalyst was enhanced with the addition of SnO2, as demonstrated by accelerated durability tests. Furthermore, the crystalline SnO2 was more effective than the amorphous counterpart in stabilizing the Pt catalysts. The enhanced electrochemical stability resulted from the addition of SnO2 was explained by the interaction between Pt and SnO2. Crystalline SnO2 also increased the electrochemical surface area of Pt catalysts, resulting in higher activity. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：144 / 149

页数：6

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