等离子体辅助制备N掺杂NiMo合金助力高效碱性水氧化OA

Water electrolysis stands as the most promising green hydrogen production technology for energy structure adjustment and optimization.The sluggish four-electron transfer process of the anodic oxygen evolution reaction(OER)significantly limits overall electrolysis efficiency,making the development of highly efficient and stable OER catalysts critical for practical applications.This paper describes the preparation of a nitrogen N-doped NiMo alloy catalyst(N-NiMo)using a low-cost,green,and efficient nitrogen plasma technology,which exhibits excellent OER performance.Nitrogen(N)atoms were successfully doped into the NiMo alloy lattice,inducing compressive lattice strain.Benefiting from optimized electronic structures,N-NiMo demonstrates exceptional OER performance with an ultralow overpotential of 230 mV at 100 mA/cm2 in 1.0 mol/L KOH.In simulated alkalized seawater(1.0 mol/L KOH+0.5 mol/L NaCl)and real alkalized seawater(1.0 mol/L KOH+seawater)electrolytes,N-NiMo retained remarkable catalytic activity(simulated alkalized seawater η100=265 mV,real alkalized seawater η100=266 mV).Furthermore,under industrial-scale current density(500 mA/cm2),the catalyst demonstrated exceptional stability with continuous operation for 1000 h in both alkalized water and real alkalized seawater environments.Finally,an anion exchange membrane electrolyzer incorporating the N-NiMo as the anode achieved an industrial-grade current density of 1000 mA/cm2 at ultralow cell voltages of 1.77 V in real alkalized seawater electrolytes,demonstrating significant potential for practical implementation.