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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

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Title
Effect of iridium oxide as an additive on catalysts with different Pt contents in cell reversal conditions of polymer electrolyte membrane fuel cells
Author(s)
Ahn, Chi-Yeong; Sungjun Kim; Choi, Hyuck Jae; Jongmin Lee; Sun Young Kang; Kim, Ok-Hee; Shim, Hyungwon; Kim, Young-Shik; Yung-Eun Sung; Kwon, Oh Joong; Yong-Hun Cho
Publication Date
2022-01
Journal
International Journal of Hydrogen Energy, v.47, no.3, pp.1863 - 1873
Publisher
Elsevier Ltd
Abstract
© 2021 Hydrogen Energy Publications LLCCell 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.
URI
https://pr.ibs.re.kr/handle/8788114/12071
DOI
10.1016/j.ijhydene.2021.10.226
ISSN
0360-3199
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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