Stability characteristics of Pt1Ni1/C as cathode catalysts in membrane electrode assembly of polymer electrolyte membrane fuel cell

被引：20
|
作者：
Cho, Yong-Hun [2 ]
Jeon, Tae-Yeol [1 ]
Yoo, Sung Jong [3 ]
Lee, Kug-Seung [3 ]
Ahn, Minjeh [1 ,4 ]
Kim, Ok-Hee [1 ]
Cho, Yoon-Hwan [1 ]
Lim, Ju Wan [1 ]
Jung, Namgee [1 ]
Yoon, Won-Sub [4 ]
Choe, Heeman [2 ]
Sung, Yung-Eun [1 ]
机构：
[1] Seoul Natl Univ, Coll Engn, Sch Chem & Biol Engn, Seoul, South Korea
[2] Kookmin Univ, Sch Adv Mat Engn, Seoul 136702, South Korea
[3] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea
[4] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea
来源：
ELECTROCHIMICA ACTA | 2012年 / 59卷
关键词：
Polymer electrolyte membrane fuel cell (PEMFC); Platinum-nickel alloy; X-ray photoelectron spectroscopy (XPS); element mapping; Constant current operation; IMPROVED DURABILITY; SUPPORTED PLATINUM; ALLOY CATALYSTS; REDUCTION; NI; ELECTROCATALYSTS; DISSOLUTION; CORROSION;
D O I：
10.1016/j.electacta.2011.10.060
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
To understand the difference in degradation characteristics between carbon-supported platinum (Pt/C) and platinum-nickel alloy (Pt1Ni1/C) cathode catalysts in membrane electrode assemblies (MEAs) of a polymer electrolyte membrane fuel cell (PEMFC), constant current operation of MEA in a single cell was conducted for 1100 h. A significant change in cell potential for the Pt1Ni1/C MEA was observed throughout the test. High-resolution transmission electron microscopy showed that sintering and detachment of metal particles in the Pt1Ni1/C catalyst occurred more sparingly than in the Pt/C catalyst. Instead. X-ray photoelectron spectroscopy element mapping revealed dissolution of Ni atoms in the Pt1Ni1 catalysts even when the Pt1Ni1/C catalyst used in the MEA was well synthesized. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：264 / 269
页数：6
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