Instability of supported platinum nanoparticles in low-temperature fuel cells

被引：815
|
作者：
Shao-Horn, Y.
Sheng, W. C. [1 ]
Chen, S.
Ferreira, P. J. [2 ]
Holby, E. F. [3 ]
Morgan, D. [3 ]
机构：
[1] MIT, Dept Chem, Electrochem Energy Lab, Cambridge, MA 02139 USA
[2] Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA
[3] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA
来源：
TOPICS IN CATALYSIS | 2007年 / 46卷 / 3-4期
基金：
美国国家科学基金会;
关键词：
fuel cell; catalyst; platinum; nanoparticles; durability; dissolution; coarsening; crystal migration; transmission electron microscopy; TEM; Ostwald ripening; solubility; coalescence;
D O I：
10.1007/s11244-007-9000-0
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
This paper discusses the mechanisms of surface area loss of supported platinum (Pt) electrocatalysts in low-temperature fuel cells. It is argued that submonolayer dissolution of Pt nanoparticles governs the surface area loss at high voltages by increasing the loss of Pt from carbon and coarsening of Pt nanoparticles on carbon.
引用
收藏
页码：285 / 305
页数：21
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