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
严欣昱 1龙飞 1李轩 1孙菲 1杨纪帆 1周潼 1刘磊1
作者信息
- 1. 上海交通大学 材料科学与工程学院,上海 200240
- 折叠
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Ni3S2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.
Abstract
Water-eletrolytic hydrogen production is the most promising technology to replace the hydro-gen 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 produc-tion,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 evolu-tion 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 Ni3S2 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Key words
electrodeposition/Ni-S alloy/heat treatment/crystallization behavior/electrocatalysis引用本文复制引用
基金项目
国家自然科学基金(52301095)
国家自然科学基金(51971140)
国家重点研发计划项目(2021YFC3101201)
出版年
2024
NETL
NSTL
万方数据