Degradation of proton exchange membrane by Pt dissolved/deposited in fuel cells

被引：31

作者：

Kim, Taehee ^{[1
]}

Lee, Ho ^{[1
]}

Sim, Woojong ^{[1
]}

Lee, Jonghyun ^{[2
]}

Kim, Saehoon ^{[2
]}

Lim, Taewon ^{[2
]}

Park, Kwonpil ^{[1
]}

机构：

[1] Sunchon Natl Univ, Dept Chem Engn, Sucheon Si 540742, Jeollanam Do, South Korea

[2] HMC Eco Technol Res Inst, Youngin Si 446912, Gyunggi Do, South Korea

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2009年 / 26卷 / 05期

关键词：

PEMFC; Membrane Degradation; FER; Pt Dissolution; Oxygen Radical; MECHANISM;

D O I：

10.1007/s11814-009-0212-9

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An accelerated single cell test and single electrode cell test were carried out to investigate membrane degradation by Pt dissolved/deposited on the membrane. For a cell operating under accelerated conditions (OCV, 90A degrees C, anode RH 0%, cathode O-2 supply), MEA analyses revealed that Pt particles were deposited in the membrane at the anode side, with a decrease in F, O, and C content near the anode side of the membrane. Dissolved Pt from the cathode showed that Pt existed mainly in the form of Pt2+ ionic species. Oxygen and hydrogen helped Pt dissolution from the cathode and Pt deposition in the membrane, respectively. Radical formation on deposited Pt in the membrane was detected by electron spin resonance (ESR). Fluoride emission rate (FER, an indicator of membrane degradation rate) increased with an increase in the amount of Pt in the membrane.

引用

页码：1265 / 1271

页数：7

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