Journal
ELECTROCHIMICA ACTA
Volume 59, Issue -, Pages 264-269Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.10.060
Keywords
Polymer electrolyte membrane fuel cell (PEMFC); Platinum-nickel alloy; X-ray photoelectron spectroscopy (XPS); element mapping; Constant current operation
Categories
Funding
- Technology Innovation Program [10029897]
- New & Renewable Energy RD Program [2008NFC08P030000]
- MKE
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea government MKE [2008-N-BL-HM-E-01-0000]
- NRF
- MEST [2009-0093814]
- Korea Evaluation Institute of Industrial Technology (KEIT) [2008-N-BL-HM-E-01-0000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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