Cho, Yong-Hun Jeon, Tae-Yeol Lim, Ju Wan Cho, Yoon-Hwan Ahnb, Minjeh Jung, Namgee Yoo, Sung Jong Yoon, Won-Sub Sung, Yung-Eun 2024-01-20T17:30:32Z 2024-01-20T17:30:32Z 2021-09-02 2011-04 0360-3199 https://pubs.kist.re.kr/handle/201004/130499 Polarization curves of membrane electrode assemblies (MEAs) containing carbon-supported platinum (Pt/C) and platinum-nickel alloy (Pt1Ni1/C) as cathode catalysts were obtained for durability test as a function of time over 1100 h at constant current. Charge transfer resistance was measured using electrochemical impedance spectroscopy and postmortem analysis such as X-ray diffraction and high-resolution transmission electron microscopy was conducted in order to elucidate the degradation factors of each MEA. Our results demonstrate that the reduced performance of MEAs containing Pt1Ni1/C as a cathode catalyst was due to decreased oxygen reduction reaction caused by the corrosion of Ni, whereas that of MEAs containing Pt/C was because of reduced electrochemical surface area induced by increased Pt particle size. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD PT-M M OXYGEN REDUCTION ALLOY CO DURABILITY ELECTROCATALYSIS DEGRADATION ELECTRODES Performance and stability characteristics of MEAs with carbon-supported Pt and Pt1Ni1 nanoparticles as cathode catalysts in PEM fuel cell Article 10.1016/j.ijhydene.2010.12.084 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.36, no.7, pp.4394 - 4399 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36 7 4394 4399 scie scopus 000289394000016 2-s2.0-79952536482 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article PT-M M OXYGEN REDUCTION ALLOY CO DURABILITY ELECTROCATALYSIS DEGRADATION ELECTRODES Polymer electrolyte membrane fuel cell (PEMFC) Platinum-nickel alloy Charge transfer resistance Electrochemical impedance spectroscopy