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

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...

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Bibliographic Details
Published in:Electrochimica acta 2012, Vol.59, p.264-269
Main Authors: CHO, Yong-Hun, JEON, Tae-Yeol, CHOE, Heeman, SUNG, Yung-Eun, SUNG JONG YOO, LEE, Kug-Seung, AHN, Minjeh, KIM, Ok-Hee, CHO, Yoon-Hwan, JU WAN LIM, JUNG, Namgee, YOON, Won-Sub
Format: Article
Language:English
Subjects:
Alloy plating
Applied sciences
Catalysis
Catalysts
Cathodes
Electrodes
Electrolytic cells
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Membranes
Platinum
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Summary: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.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2011.10.060