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<p>The catalysts of proton exchange membrane water electrolysis (PEMWE) are Pt/C for the cathode and IrO<sub>2</sub> for the anode, although they will have a problem for material shortage in the future. The catalyst of MnIrOx is a good candidate for the oxygen evolution catalyst including stability, however, the durability related to the applied voltage is still obscure. In this study, the degradation depending on the low/high rectangular and steady applied voltages or steady applied current are discussed, and the voltage range for stable MnIrOx catalyst is almost clarified.</p> Graphic abstract <p></p>

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Time course change of proton exchange membrane water electrolysis (PEMWE) electric properties for hydrogen evolution with MnIrOx oxygen evolution catalyst

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Miyuki Nara,
  • Katsushi Fujii,
  • Takeharu Murakami,
  • Kazuna Fushimi,
  • Shuang Kong,
  • Ailong Li,
  • Takayo Ogawa,
  • Ryuhei Nakamura,
  • Satoshi Wada

摘要

The catalysts of proton exchange membrane water electrolysis (PEMWE) are Pt/C for the cathode and IrO2 for the anode, although they will have a problem for material shortage in the future. The catalyst of MnIrOx is a good candidate for the oxygen evolution catalyst including stability, however, the durability related to the applied voltage is still obscure. In this study, the degradation depending on the low/high rectangular and steady applied voltages or steady applied current are discussed, and the voltage range for stable MnIrOx catalyst is almost clarified.

Graphic abstract