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Ultrafast 60-Second Synthesis of Meter-Scale Ni-based Catalysts via Phosphomolybdic Acid Complexation for Durable Seawater Oxidation at 1 A cm−2
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DOI：10.1002/smll.202513251.png)
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Abstract
En 中文
Direct seawater electrolysis offers a sustainable pathway for hydrogen production, yet the development of cost-effective catalysts with high activity, durability, and scalable preparation remains challenging. Here, we report a mild interfacial synergistic etching strategy that enables the rapid fabrication of efficient oxygen evolution catalysts. Nickel foam is controllably etched by phosphomolybdic acid (PMA) and trace Fe3 +, yielding meter-scale catalysts (60-Fe-PMA/NF) within 60 s at room temperature. The synergistic incorporation of iron and the dynamic leaching–reabsorption of phosphomolybdate in alkaline media promote rapid surface reconstruction, enhancing chloride corrosion resistance and impurity tolerance. As a result, 60-Fe-PMA/NF exhibits superior stability under harsh seawater electrolysis conditions. In a zero-gap electrolyzer, it operates steadily for more than 270 h at 1.0 A cm−2 in alkaline seawater (1 M KOH + seawater). This work demonstrates a scalable, low-cost strategy for constructing robust OER catalysts, advancing practical seawater electrolysis toward sustainable hydrogen production.
Keywords:
industrial-scale fabrication
interfacial etching
oxygen evolution catalyst
seawater electrolysis
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12.1
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3.0W
Citations:
16.4W
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