电沉积制备NiMoCe碱性电解水大电流析氢催化电极的研究
Study of electrodeposited Ni-Mo-Ce catalytic electrodes for high-current-density hydrogen evolution in alkaline water electrolysis
针对碱性电解槽大电流密度制氢技术需求,采用电沉积法制备Ni-Mo-Ce三元合金电极,成功制备出具有微观叶状三维结构的NiMoCe催化电极。该电极在600 mA/cm2大电流密度下展现出超低过电位(220 mV)和Tafel斜率(52 mV/dec),且在200 h稳定性测试中性能衰减小于10 mV,表现出卓越的电催化性能和长期稳定性,为碱性电解水制氢技术向大电流密度方向发展提供关键材料支持。
To meet the technical demands for high-current-density hydrogen production in alkaline electrolyzers,Ni-Mo-Ce ternary alloy electrodes were fabricated via electrodeposition,successfully constructing NiMoCe catalytic electrodes with a unique microscale foliated three-dimensional structure.The optimized electrode exhibits exceptional electrocatalytic performance,delivering an ultralow overpotential of 220 mV and a Tafel slope of 52 mV·dec-1 at a high current density of 600 mA·cm-2.Remarkably,the electrode demonstrates outstanding long-term stability,with a negligible performance decay of less than 10 mV during rigorous 200-hour durability testing.This work provides crucial material support for advancing alkaline water electrolysis technology toward practical high-current-density operation.
大电流析氢 / 电沉积 / 电催化 / 非贵金属催化剂 / 碱性电解水
high-current-density hydrogen evolution / electrodeposition / electrocatalysis / non-noble metal catalysts / alkaline water electrolysis
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