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

页码：264 / 269

页数：6

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