Investigation of migrated platinum distributions in PEMFC under excess H2/O2.

被引：4

作者：

Kim, L. ^{[1
]}

Chung, C. G. ^{[1
]}

Sung, Y. W. ^{[1
]}

Chung, J. S. ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem Engn, Pohang 790784, South Korea

来源：

PROTON EXCHANGE MEMBRANE FUEL CELLS 8, PTS 1 AND 2 | 2008年 / 16卷 / 02期

关键词：

D O I：

10.1149/1.2981934

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to verify the dissolution mechanism of Pt in the electrode of PEMFC, the distributions of migrated platinum particles in the electrolyte membrane were investigated. The migrated platinum was observed by transmission electron microscope (TEM) after long-term operations under various operation conditions. Experimental results show that a large amount of Pt can be dissolved from cathode by chemical oxidation under excess O-2. The distribution and particle size of migrated Pt are strongly dependant on H-2 and O-2 partial pressures. Possibility of Pt dissolution from anode is also appeared from observation of the MEA operated under lean H-2 condition.

引用

页码：945 / 953

页数：9

共 24 条

[1] Performance and lifetime analysis of the kW-class PEMFC stack [J].

Ahn, SY ;

Shin, SJ ;

Ha, HY ;

Hong, SA ;

Lee, YC ;

Lim, TW ;

Oh, IH .

JOURNAL OF POWER SOURCES, 2002, 106 (1-2) :295-303

[2] Analytical TEM study of Pt particle deposition in the proton-exchange membrane of a membrane-electrode-assembly [J].

Akita, Tomoki ;

Taniguchi, Akira ;

Maekawa, Junko ;

Sirorna, Zyun ;

Tanaka, Koji ;

Kohyama, Masanori ;

Yasuda, Kazuaki .

JOURNAL OF POWER SOURCES, 2006, 159 (01) :461-467

[3]

Bard A.J, 1985, STANDARD POTENTIALS, P353

[4] Polarization study of a PEMFC with four reference electrodes at hydrogen starvation conditions [J].

Baumgartner, W. R. ;

Parz, P. ;

Fraser, S. D. ;

Wallnoefer, E. ;

Hacker, V. .

JOURNAL OF POWER SOURCES, 2008, 182 (02) :413-421

[5] PEM fuel cell electrocatalyst durability measurements [J].

Borup, Rod L. ;

Davey, John R. ;

Garzon, Fernando H. ;

Wood, David L. ;

Inbody, Michael A. .

JOURNAL OF POWER SOURCES, 2006, 163 (01) :76-81

[6] A polymer electrolyte fuel cell life test: 3 years of continuous operation [J].

Cleghorn, S. J. C. ;

Mayfield, D. K. ;

Moore, D. A. ;

Moore, J. C. ;

Rusch, G. ;

Sherman, T. W. ;

Sisofo, N. T. ;

Beuscher, U. .

JOURNAL OF POWER SOURCES, 2006, 158 (01) :446-454

[7] Kinetic model of platinum dissolution in PEMFCs [J].

Darling, RM ;

Meyers, JP .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (11) :A1523-A1527

[8] Instability of Pt/C electrocatalysts in proton exchange membrane fuel cells - A mechanistic investigation [J].

Ferreira, PJ ;

la O', GJ ;

Shao-Horn, Y ;

Morgan, D ;

Makharia, R ;

Kocha, S ;

Gasteiger, HA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (11) :A2256-A2271

[9] Gas crossover and membrane degradation in polymer electrolyte fuel cells [J].

Inaba, Minoru ;

Kinumoto, Taro ;

Kiriake, Masayuki ;

Umebayashi, Ryota ;

Tasaka, Akimasa ;

Ogumi, Zempachi .

ELECTROCHIMICA ACTA, 2006, 51 (26) :5746-5753

[10]

Kamiya N., 2006, ECS T, V3, P619

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