biostudies-literatureUnknown15(26)Li RQElectrocatalytic hydrogen production in seawater to alleviate freshwater shortage pressures is promising, but is hindered by the sluggish oxygen evolution reaction and detrimental chloride electrochemistry. Herein, a dual strategy approach of Fe-doping and CeO₂-decoration in nickel phosphide (Fe-Ni₂P/CeO₂) is rationally designed to achieve superior bifunctional catalytic performance for the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR) in seawater. Notably, the two-electrode Fe-Ni₂P/CeO₂-based hybrid seawater electrolyzer realizes energy-efficient and chlorine-free hydrogen production with ultralow cell voltages of 0.051 and 0.597 V at 10 and 400 mA cm^-2, which are significantly lower than those nChemical science10084-10091https://www.ebi.ac.uk/biostudies/studies/S-EPMC11220599biostudies-literatureDual-strategy engineered nickel phosphide for achieving efficient hydrazine-assisted hydrogen production in seawater.PMC11220599Zhang GZhang WLiu YWang CCao JGe MGuo SWang XWan XLi RQDai JXie SfalseDual-strategy engineered nickel phosphide for achieving efficient hydrazine-assisted hydrogen production in seawater.Electrocatalytic hydrogen production in seawater to alleviate freshwater shortage pressures is promising, but is hindered by the sluggish oxygen evolution reaction and detrimental chloride electrochemistry. Herein, a dual strategy approach of Fe-doping and CeO₂-decoration in nickel phosphide (Fe-Ni₂P/CeO₂) is rationally designed to achieve superior bifunctional catalytic performance for the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR) in seawater. Notably, the two-electrode Fe-Ni₂P/CeO₂-based hybrid seawater electrolyzer realizes energy-efficient and chlorine-free hydrogen production with ultralow cell voltages of 0.051 and 0.597 V at 10 and 400 mA cm^-2, which are significantly lower than those n2024-01-01T00:00:00Z2024 Jul2025-04-18T13:51:16.614Z2025-04-06T23:38:35.485ZS-EPMC112205993896635610.1039/d4sc01160k