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Effect of anode iridium oxide content on the electrochemical performance and resistance to cell reversal potential of polymer electrolyte membrane fuel cells

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Title
Effect of anode iridium oxide content on the electrochemical performance and resistance to cell reversal potential of polymer electrolyte membrane fuel cells
Author(s)
Chi-Yeong Ahn; Sun Young Kang; Hyuck Jae Choi; Ok-Hee Kim; Yung-Eun Sung; Yong-Hun Cho
Publication Date
2021-04
Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.46, no.27, pp.14713 - 14723
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
An ideal polymer electrolyte membrane fuel cell (PEMFC) is one that continuously generates electricity as long as hydrogen and oxygen (or air) are supplied to its anode and cathode, respectively. However, internal and/or external conditions could bring about the degradation of its electrodes, which are composed of nanoparticle catalysts. Particularly, when the hydrogen supply to the anode is disrupted, a reverse voltage is generated. This phenomenon, which seriously degrades the anode catalyst, is referred to as cell reversal. To prevent its occurrence, iridium oxide (IrO2) particles were added to the anode in the membrane-electrode assembly of the PEMFC single-cells. After 100 cell reversal cycles, the single-cell voltage profiles of the anode with Pt/C only and the anodes with Pt/C and various IrO2 contents were obtained. Additionally, the cell reversal-induced degradation phenomenon was also confirmed electrochemically and physically, and the use of anodes with various IrO2 contents was also discussed. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/9941
DOI
10.1016/j.ijhydene.2021.01.199
ISSN
0360-3199
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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