热处理对电沉积Ni-S合金微观组织和析氢性能的影响  

The influence of heat treatment on microstructure and hydrogen evolution properties of electrodeposited Ni-S alloy

作　　者：严欣昱 龙飞 李轩 孙菲 杨纪帆 周潼 刘磊[1] Yan Xinyu;Long Fei;Li Xuan;Sun Fei;Yang Jifan;Zhou Tong;Liu Lei(School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学材料科学与工程学院,上海200240

出　　处：《电镀与精饰》2024年第7期8-14,共7页Plating & Finishing

基　　金：国家自然科学基金资助项目(Nos.52301095,51971140);国家重点研发计划项目(2021YFC3101201)。

摘　　要：电解水制氢是目前最有望替代矿石燃料制氢的技术,低成本且高效的析氢电极是限制电解水制氢大规模应用的瓶颈问题,而Ni-S合金具有易制备和高活性等优点,作为电解水的阴极材料具有极大的潜力。通过电沉积法在泡沫镍表面制备了非晶Ni-S合金,研究了Ni-S合金的晶化行为对其析氢性能的影响,热处理促使非晶Ni-S合金镀层再结晶转变为以Ni_(3)S_(2)和Ni为主的结晶层,电化学分析结果表明热处理减少非晶Ni-S合金镀层的析氢活性位点,增大氢气从Ni-S合金表面脱附难度,显著削弱Ni-S/NF电极的电化学析氢性能。Water-eletrolytic hydrogen production is the most promising technology to replace the hydrogen production from fossil fuel,the hydrogen evolution electrode with low cost and high efficiency is the bottleneck problem limiting the large-scale application of water electrolysis for hydrogen production,Ni-S alloy exhibits the great potential as a cathode material for water electrolysis due to its easy preparation and high activity.Herein,the amorphous Ni-S alloy coating was prepared on the surface of nickel foam via electrodeposition,and the influence of crystallization behavior on the hydrogen evolution activity of Ni-S alloy was investigated in this work.Heat treatment promoted the recrystallization of the amorphous Ni-S alloy coating into crystalline layer mainly composed of Ni_(3)S_(2) and Ni phases,the electrochemical analysis revealed that heat treatment reduced the number of active sites on the amorphous Ni-S alloy coating for hydrogen evolution reaction,and increased the difficulty of hydrogen desorption from the surface of the Ni-S alloy,thus,the electrochemical hydrogen evolution performance of the Ni-S/NF electrode was significantly weakened.

关 键 词：电沉积 Ni-S合金 热处理 晶化行为 电催化 

分 类 号：TQ153.2[化学工程—电化学工业]