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<p>Seawater electrolysis is an appealing route toward sustainable hydrogen production, yet its practical deployment is hindered by severe chloride-induced corrosion and parasitic chlorine oxidation. Here, we report noble metal-doped NiV layered double hydroxides (LDHs) that integrate electronic modulation with a dual chloride confinement mechanism. Ir incorporation simultaneously establishes strong Ir-Cl coordination and dynamically regenerated VO<sub>4</sub><sup>3−</sup> layers, producing an adaptive electrostatic shield that effectively suppresses chloride penetration. As a result, Ir-NiV LDH delivers nearly 100% oxygen evolution reaction selectivity and outstanding stability over 2750 h at 500 mA cm<sup>−2</sup>. Meanwhile, Ru doping optimizes the hydrogen evolution pathway, enabling a low overpotential of 195 mV and &gt;2350 h durability. When paired in a twso-electrode electrolyzer, the Ru-NiVLDH||Ir-NiVLDH system exhibits industrial-level performance and unprecedented robustness in alkaline seawater. This dual chloride confinement concept provides a general framework for catalyst design in corrosive ionic environments, extending beyond seawater splitting toward other electrochemical energy conversion processes.</p><p></p>

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Dual Chloride Confinement in Noble Metal‐Doped NiV LDH Catalysts Enables Stable Industrial-Level Seawater Electrolysis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月16日

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  • Kai Liu,
  • Yaohai Cai,
  • Xiaotian Wei,
  • Lihang Qu,
  • Jianxi Lu,
  • Yingwei Qi,
  • Zhenbo Wang,
  • Dong Liu

摘要

Seawater electrolysis is an appealing route toward sustainable hydrogen production, yet its practical deployment is hindered by severe chloride-induced corrosion and parasitic chlorine oxidation. Here, we report noble metal-doped NiV layered double hydroxides (LDHs) that integrate electronic modulation with a dual chloride confinement mechanism. Ir incorporation simultaneously establishes strong Ir-Cl coordination and dynamically regenerated VO43− layers, producing an adaptive electrostatic shield that effectively suppresses chloride penetration. As a result, Ir-NiV LDH delivers nearly 100% oxygen evolution reaction selectivity and outstanding stability over 2750 h at 500 mA cm−2. Meanwhile, Ru doping optimizes the hydrogen evolution pathway, enabling a low overpotential of 195 mV and >2350 h durability. When paired in a twso-electrode electrolyzer, the Ru-NiVLDH||Ir-NiVLDH system exhibits industrial-level performance and unprecedented robustness in alkaline seawater. This dual chloride confinement concept provides a general framework for catalyst design in corrosive ionic environments, extending beyond seawater splitting toward other electrochemical energy conversion processes.