摘要
采用真空电弧熔炼与快速凝固相结合的方法制备了Ni_(30)Al_(70)、Ni_(10)Co_(20)Al_(70)合金条带,经过电化学脱合金化除Al,成功得到多孔Ni电极、纳米多孔Ni-Co电极.通过XRD、SEM等微观技术表征了电极的相结构和表面形貌.运用电化学线性扫描(LSV)、电化学阻抗谱(EIS)等手段研究了电极在w(NaOH)=20%溶液中的析氢反应(HER)电催化活性.结果表明:与纳米多孔Ni电极相比,纳米多孔Ni-Co电极具有低的析氢过电位、低的析氢反应电阻及高的比表面积.
Ni30Al70、Ni10Co20Al70alloying straps were prepared with combined method of vacuum arc melting rapid solidifying.Then,both porous Ni electrode and nano-porous Ni-Co electrodes were successfully obtained by means of eliminating dissolution Al with electrochemical dealloying.The phase composition and surface morphology of the electrode were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The electro-catalytic activity of hydrogen evolution reaction(HER)of the porous Ni and nano-porous Ni-Co electrodes in NaOH solution with mass-fraction of20%,was investigated by means of electrochemical linear voltammetric scanning(LSV)and electrochemical impedance spectroscopy(EIS).The result showed that the nano-porous Ni-Co electrode would exhibit a lower over-potential and resistance for HER and a higher specific surface area than that of the porous Ni electrode.
作者
周琦
冯基伟
李志洋
汪帆
任向荣
ZHOU Qi;FENG Ji-wei;LI Zhi-yang;WANG Fan;REN Xiang-rong(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou Univ. of Tech.,Lanzhou 730050,China)
出处
《兰州理工大学学报》
CAS
北大核心
2018年第6期1-5,共5页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51661018)
关键词
脱合金化
电化学
纳米多孔Ni-Co电极
析氢反应
dealloying
electrochemistry
nano-porous Ni-Co electrode
hydrogen evolution reaction
