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<p>Although seawater electrolysis holds great promise for green hydrogen production, the persistent challenges of chloride ions (Cl<sup>−</sup>)-induced chemical corrosion and localized acid etching under high potential severely hinder the lifespan of the anode. Herein, we propose that Os nanoparticles anchored on CoP nanowires supported by Ni foam (Os-CoP/NF) acts as a dual-protection anode with proton-buffering and Cl<sup>−</sup>-repelling capabilities to simultaneously inhibit corrosion during seawater oxidation. The self-released PO<sub>4</sub><sup>3−</sup> not only repels Cl<sup>−</sup> but also mitigates the gradual decrease in local pH over reaction time. Meanwhile, the dispersed Os sites can bind with Cl<sup>−</sup> to form Os–Cl species, which inhibit chlorine chemistry corrosion via the common-ion repulsive effect. The designed anode achieves stable operation for up to 4500-h ampere-level real seawater electrolysis. Notably, this protection strategy safeguards the active sites from corrosion both during operation and after the shutdown of system. The assembled membrane electrode also exhibits a lifespan of 500 h for both continuous electrolysis and intermittent electrolysis, demonstrating an electrode design concept with broad application potential.</p>

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Dual-function surface engineering for enhancing anode stability in alkaline seawater oxidation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月14日

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  • Yuchun Ren,
  • Denian Wang,
  • Shengjun Sun,
  • Zixiao Li,
  • Yongchao Yao,
  • Zhiyuan Yang,
  • Hefeng Wang,
  • Jiayun Song,
  • Chaoxin Yang,
  • Zhengwei Cai,
  • Yanqin Lv,
  • Guanwei Cui,
  • Yongsong Luo,
  • Imran Shakir,
  • Fengming Luo,
  • Min Wu,
  • Qi Yu,
  • Haitao Peng,
  • Xuping Sun,
  • Bo Tang

摘要

Although seawater electrolysis holds great promise for green hydrogen production, the persistent challenges of chloride ions (Cl−)-induced chemical corrosion and localized acid etching under high potential severely hinder the lifespan of the anode. Herein, we propose that Os nanoparticles anchored on CoP nanowires supported by Ni foam (Os-CoP/NF) acts as a dual-protection anode with proton-buffering and Cl−-repelling capabilities to simultaneously inhibit corrosion during seawater oxidation. The self-released PO43− not only repels Cl− but also mitigates the gradual decrease in local pH over reaction time. Meanwhile, the dispersed Os sites can bind with Cl− to form Os–Cl species, which inhibit chlorine chemistry corrosion via the common-ion repulsive effect. The designed anode achieves stable operation for up to 4500-h ampere-level real seawater electrolysis. Notably, this protection strategy safeguards the active sites from corrosion both during operation and after the shutdown of system. The assembled membrane electrode also exhibits a lifespan of 500 h for both continuous electrolysis and intermittent electrolysis, demonstrating an electrode design concept with broad application potential.