Development of electrodeposited IrO<inf>2</inf> electrodes as anodes in polymer electrolyte membrane water electrolysis

Byung Seok Lee, Sang Hyun Ahn, Hee Young Park, Insoo Choi, Sung Jong Yoo, Hyoung Juhn Kim, Dirk Henkensmeier, Jin Young Kim, Sehkyu Park, SukWoo Nam, Kwan Young Lee, Jong Hyun Jang

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59 Citations (Scopus)

Abstract

To reduce the use of noble metals, iridium oxide (IrO<inf>2</inf>) catalysts are prepared on carbon paper (CP) by electrodeposition for use as the anodes in polymer electrolyte membrane water electrolysis (PEMWE). The activities of the fabricated electrodes toward the oxygen evolution reaction are evaluated. The loading amount and morphology of the IrO<inf>2</inf> deposits are varied by controlling the electrodeposition potential (E<inf>dep</inf>) and time (t<inf>dep</inf>). When electrodeposited at 0.7V, the IrO<inf>2</inf> loading ranges from 0.007 to 0.464mgcm<sup>-2</sup> (t<inf>dep</inf>: 1~30min). In the PEMWE test at 90°C, the IrO<inf>2</inf>/CP electrode with an IrO<inf>2</inf> loading of 0.1mgcm<sup>-2</sup> shows the highest performance (1.92Acm<sup>-2</sup> at 1.8V) in which high IrO<inf>2</inf> utilization is achieved without significant exposure of the substrate carbon surface. The developed IrO<inf>2</inf>/CP electrodes provide cell performances comparable to those in previous reports with a higher IrO<inf>2</inf> loading, indicating markedly enhanced mass activity.

Original languageEnglish
Pages (from-to)285-291
Number of pages7
JournalApplied Catalysis B: Environmental
Volume179
DOIs
Publication statusPublished - 2015 Dec 1

Keywords

  • Electrodeposition
  • Iridium oxide
  • Oxygen evolution reaction
  • Polymer electrolyte membrane water electrolysis
  • Single cell test

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

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    Lee, B. S., Ahn, S. H., Park, H. Y., Choi, I., Yoo, S. J., Kim, H. J., Henkensmeier, D., Kim, J. Y., Park, S., Nam, S., Lee, K. Y., & Jang, J. H. (2015). Development of electrodeposited IrO<inf>2</inf> electrodes as anodes in polymer electrolyte membrane water electrolysis. Applied Catalysis B: Environmental, 179, 285-291. https://doi.org/10.1016/j.apcatb.2015.05.027