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<p>Monolithic electrode of multiscale-architected NiFeP@PBA/NF was fabricated via a low-temperature plasma-assisted synthetic strategy. The nickel foam (NF) substrate was employed to prepare NiFeLDH/NF with a 2D-3D multidimensional hierarchical configuration through a facile hydrothermal in situ growth method. Potassium ferricyanide was subsequently utilized as a semi-sacrificial template for etching, forming a NiFeLDH@NiFePBA/NF precursor. Plasma technology facilitated in situ low-temperature phosphating, achieving multi-dimensional integration of bimetallic phosphide (NiFeP) and PBA, ultimately yielding the NiFeP@PBA/NF integrated electrode. Experimental results demonstrate that the complete exposure of active sites and the presence of multistage channels expedite electron transfer, thereby enhancing the catalyst’s OER catalytic efficiency across alkaline freshwater and seawater electrolytes, achieving 100&#xa0;mA&#xa0;cm<sup>−2</sup> at merely 244&#xa0;mV and 262&#xa0;mV, respectively. Furthermore, the NiFeP@PBA/NF||Pt/C/NF electrolyzer exhibits remarkable durability, requiring only 1.585&#xa0;V to drive 100&#xa0;mA&#xa0;cm<sup>−2</sup> in alkaline natural seawater systems.</p>

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Monolithic electrode of multiscale-architected nickel–iron phosphides via plasma for electrocatalytic seawater splitting

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Fulong Dong,
  • Rongzheng An,
  • Lele Gao,
  • Guangrui Zhang,
  • Jing Zhao,
  • Guoling Li

摘要

Monolithic electrode of multiscale-architected NiFeP@PBA/NF was fabricated via a low-temperature plasma-assisted synthetic strategy. The nickel foam (NF) substrate was employed to prepare NiFeLDH/NF with a 2D-3D multidimensional hierarchical configuration through a facile hydrothermal in situ growth method. Potassium ferricyanide was subsequently utilized as a semi-sacrificial template for etching, forming a NiFeLDH@NiFePBA/NF precursor. Plasma technology facilitated in situ low-temperature phosphating, achieving multi-dimensional integration of bimetallic phosphide (NiFeP) and PBA, ultimately yielding the NiFeP@PBA/NF integrated electrode. Experimental results demonstrate that the complete exposure of active sites and the presence of multistage channels expedite electron transfer, thereby enhancing the catalyst’s OER catalytic efficiency across alkaline freshwater and seawater electrolytes, achieving 100 mA cm−2 at merely 244 mV and 262 mV, respectively. Furthermore, the NiFeP@PBA/NF||Pt/C/NF electrolyzer exhibits remarkable durability, requiring only 1.585 V to drive 100 mA cm−2 in alkaline natural seawater systems.