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Effect of iridium oxide as an additive on catalysts with different Pt contents in cell reversal conditions of polymer electrolyte membrane fuel cells

Authors
Ahn, Chi-YeongKim, SungjunChoi, Hyuck JaeLee, JongminKang, Sun YoungKim, Ok-Hee심형원김영식Sung, Yung-EunKwon, Oh JoongCho, Yong-Hun
Issue Date
8-Jan-2022
Publisher
Elsevier BV
Keywords
Additives; Cell reversal; Durability; Electrode; Polymer electrolyte membrane fuel cell
Citation
International Journal of Hydrogen Energy, v.47, no.3, pp.1863 - 1873
Journal Title
International Journal of Hydrogen Energy
Volume
47
Number
3
Start Page
1863
End Page
1873
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/1920
DOI
10.1016/j.ijhydene.2021.10.226
ISSN
0360-3199
Abstract
Cell reversal is observed when a current load is applied to the polymer electrolyte membrane fuel cell under fuel starvation conditions. Cell reversal causes severe corrosion (or oxidation) of the carbon support in the anode, which leads to a decrease in overall fuel cell performance. To suppress the corrosion reaction of carbon under cell reversal conditions and to increase the durability of fuel cells, studies on anode additives are being conducted. However, studies on the effect of additives on catalysts with different platinum contents have not been conducted. In this study, 20 wt%, 40 wt%, 60 wt% commercial Pt/C catalyst was applied to the anode, and 50 cycles of cell reversal were performed. Furthermore, the performance change with and without IrO2 as an additive was observed and its effect was assessed. Changes in the morphologies of the electrodes before and after cell reversal tests were also observed using a transmission electron microscope and a scanning electron microscope. The higher the platinum content of the catalyst, the more resistant to cell reversal. In addition, the addition of IrO2 to the anode effectively prevents performance degradation due to cell reversal. ? 2021 Hydrogen Energy Publications LLC
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Ahn, Chi Yeong
친환경연료추진연구본부 (친환경연료추진연구본부 친환경연료추진연구본부)
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