Carbon-Free Pt Electrocatalysts Supported on SnO2 for Polymer Electrolyte Fuel Cells: Electrocatalytic Activity and Durability

被引:136
作者
Takasaki, F. [1 ]
Matsuie, S. [1 ]
Takabatake, Y. [1 ]
Noda, Z. [2 ]
Hayashi, A. [2 ,3 ]
Shiratori, Y. [1 ,3 ]
Ito, K. [1 ,2 ,3 ]
Sasaki, K. [1 ,2 ,3 ]
机构
[1] Kyushu Univ, Fac Engn, Dept Mech Engn, Nishi Ku, Fukuoka 8190395, Japan
[2] Kyushu Univ, Int Res Ctr Hydrogen Energy, Nishi Ku, Fukuoka 8190395, Japan
[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res, Nishi Ku, Fukuoka 8190395, Japan
关键词
OXIDE; STABILITY; NANOPARTICLES; DEGRADATION; MITIGATION; REDUCTION; CATALYSTS; CORROSION; ACID;
D O I
10.1149/1.3625918
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The use of SnO2 as an alternative electrocatalyst support improves durability against voltage cycling up to a high potential, corresponding to the start-up and shut-down situation of polymer electrolyte fuel cell (PEFC) systems. Electrochemical surface area (ECSA) and oxygen reduction reaction (ORR) activity of Pt electrocatalysts as well as electrical conductivity of the electrocatalyst layers increase by doping of SnO2 with Nb or Sb. The durability tests with voltage cycles between 0.9 and 1.3 V versus reversible hydrogen electrode (RHE) potential have revealed that the Pt electrocatalyst supported on SnO2 (Pt/SnO2) withstands 60,000 voltage cycles while maintaining its ECSA, which corresponds to a lifetime of more than 20 years with respect to the durability against voltage cycling. These results indicate that SnO2-supported carbon-free electrocatalysts can be alternatives to the conventional Pt/C electrocatalyst, as a fundamental solution against carbon support corrosion, to improve PEFC durability. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3625918] All rights reserved.
引用
收藏
页码:B1270 / B1275
页数:6
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