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

Title
Stability characteristics of Pt1Ni1/C as cathode catalysts in membrane-electrode assembly of polymer electrolyte membrane fuel cell
Authors
조용훈전태열유성종이국승안민제김옥희조윤환임주완정남기윤원섭조희남성영은
Keywords
Polymer electrolyte membrane fuel cell (PEMFC); X-ray photoelectron spectroscopy (XPS); Platinum-nickel alloy; Constant current operation; element mapping
Issue Date
2012-01
Publisher
Electrochimica acta
Citation
VOL 59, NO 1, 264-269
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/40780
ISSN
0013-4686
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KIST Publication > Article
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