Cho, Yong-Hun Jeon, Tae-Yeol Yoo, Sung Jong Lee, Kug-Seung Ahn, Minjeh Kim, Ok-Hee Cho, Yoon-Hwan Lim, Ju Wan Jung, Namgee Yoon, Won-Sub Choe, Heeman Sung, Yung-Eun 2024-01-20T15:33:32Z 2024-01-20T15:33:32Z 2021-09-05 2012-01-01 0013-4686 https://pubs.kist.re.kr/handle/201004/129652 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. English PERGAMON-ELSEVIER SCIENCE LTD IMPROVED DURABILITY SUPPORTED PLATINUM ALLOY CATALYSTS REDUCTION NI ELECTROCATALYSTS DISSOLUTION CORROSION Stability characteristics of Pt1Ni1/C as cathode catalysts in membrane electrode assembly of polymer electrolyte membrane fuel cell Article 10.1016/j.electacta.2011.10.060 1 ELECTROCHIMICA ACTA, v.59, pp.264 - 269 ELECTROCHIMICA ACTA 59 264 269 scie scopus 000299911500039 2-s2.0-84655169630 Electrochemistry Electrochemistry Article IMPROVED DURABILITY SUPPORTED PLATINUM ALLOY CATALYSTS REDUCTION NI ELECTROCATALYSTS DISSOLUTION CORROSION Polymer electrolyte membrane fuel cell (PEMFC) Platinum-nickel alloy X-ray photoelectron spectroscopy (XPS) element mapping Constant current operation