Eom, KwangSup Jo, Yoo Yeon Cho, EunAe Lim, Tae-Hoon Jang, Jong Hyun Kim, Hyoung-Juhn Hong, Bo Ki Lee, Jong Hyun 2024-01-20T15:33:16Z 2024-01-20T15:33:16Z 2021-09-05 2012-01-15 0378-7753 https://pubs.kist.re.kr/handle/201004/129639 A PEMFC stack inevitably experiences reverse current conditions during startup and shutdown processes. Residual oxygen partial pressure in the stack affects the local potential in the cathode facing oxygen in the anode and plays a critical role in cathode degradation. In this study, effects of residual oxygen partial pressure on PEMFC degradation were studied under reverse current conditions. Increasing the residual oxygen partial pressure under repetitive reverse current conditions accelerates performance decay and facilitates cathode degradation. Cathode degradation is revealed by an increase in charge-transfer resistance and a decrease in electrochemical active surface area, which can be attributed to corrosion of the carbon support and dissolution/migration and agglomeration of the platinum catalyst. (C) 2011 Elsevier B.V. All rights reserved. English ELSEVIER INLET RELATIVE-HUMIDITY CARBON CORROSION PEMFC DURABILITY CATALYST MICROSTRUCTURE DAMAGE Effects of residual oxygen partial pressure on the degradation of polymer electrolyte membrane fuel cells under reverse current conditions Article 10.1016/j.jpowsour.2011.09.085 1 JOURNAL OF POWER SOURCES, v.198, pp.42 - 50 JOURNAL OF POWER SOURCES 198 42 50 scie scopus 000297890700007 2-s2.0-80755163466 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article INLET RELATIVE-HUMIDITY CARBON CORROSION PEMFC DURABILITY CATALYST MICROSTRUCTURE DAMAGE Polymer electrolyte membrane fuel cell Degradation Durability Reverse current condition Oxygen partial pressure