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<p>Developing noble-metal-free electrocatalyst for oxygen evolution reaction in a proton exchange membrane water electrolyzer is a key to sustainable and economical hydrogen production. Herein, we rationally design and develop a chromium and neodymium co-doped cobalt oxide (CrNd-Co<sub>3</sub>O<sub>4</sub>) electrocatalyst that exhibits high activity and durability in the acidic oxygen evolution reaction condition. Furthermore, an in-situ acid circulation strategy is proposed to tackle the ubiquitous issue of membrane poisoning by leached cations in proton exchange membrane water electrolyzers. Consequently, the proton exchange membrane water electrolyzer with CrNd-Co<sub>3</sub>O<sub>4</sub> anode achieves a stable operating current density of 2 amperes per square centimeter at 2.27 volts and 4 amperes per square centimeter at 2.54 volts for 1,000 hours.</p>

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Cr and Nd co-doped cobalt oxide for stable proton exchange membrane water electrolysis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月13日

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  • Tianshu Gao,
  • Fuhua Li,
  • Sung-Fu Hung,
  • Hongbin Yang,
  • Yulin Sun,
  • Kang-Shun Peng,
  • Qihao Sha,
  • Qing Mao,
  • Huabing Tao,
  • Peng Chen,
  • Bin Liu

摘要

Developing noble-metal-free electrocatalyst for oxygen evolution reaction in a proton exchange membrane water electrolyzer is a key to sustainable and economical hydrogen production. Herein, we rationally design and develop a chromium and neodymium co-doped cobalt oxide (CrNd-Co3O4) electrocatalyst that exhibits high activity and durability in the acidic oxygen evolution reaction condition. Furthermore, an in-situ acid circulation strategy is proposed to tackle the ubiquitous issue of membrane poisoning by leached cations in proton exchange membrane water electrolyzers. Consequently, the proton exchange membrane water electrolyzer with CrNd-Co3O4 anode achieves a stable operating current density of 2 amperes per square centimeter at 2.27 volts and 4 amperes per square centimeter at 2.54 volts for 1,000 hours.