郭 昭,齐海东,卢 帅,李运刚,杨海丽.Ni-Co /MoS2复合电沉积行为及析氢性能研究[J].有色金属工程,2019,9(8):.
Ni-Co /MoS2复合电沉积行为及析氢性能研究
Study on Ni-Co /MoS2 Composite Electrodeposition Behavior and Hydrogen Evolution Property
投稿时间:2018-07-23  修订日期:2018-08-15
DOI:
中文关键词:  Ni-Co/MoS2  电沉积行为  电催化析氢活性  复合电沉积
英文关键词:Ni-Co/MoS2  electrodeposition behavior  hydrogen evolution performance  composite electrodeposition
基金项目:河北省杰出青年科学基金项目(E2017209079)
              
作者单位
郭 昭 华北理工大学
齐海东 华北理工大学
卢 帅 华北理工大学
李运刚 华北理工大学
杨海丽 华北理工大学
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中文摘要:
      为了提高Ni-Co合金的电催化析氢活性,在制备过程中加入MoS2粒子。采用循环伏安与计时电流法研究了Ni-Co/MoS2复合电极在柠檬酸钠体系电解液中的电沉积行为;通过阴极极化曲线与电化学交流阻抗考察了复合电极在碱性环境下的电催化析氢性能。结果表明:MoS2颗粒加入电解液吸附于电极表面改变电极表面的活性位点,成核弛豫时间减少,成核速率提高,形核过程完全转变为三维瞬时成核。当电位小于-1.0V时,MoS2颗粒促进Ni-Co的电化学还原。当电位大于-1.0V时,MoS2颗粒抑制Ni-Co的电化学还原。Ni-Co/MoS2复合电极表面粗糙多孔,有大的比表面积,与Ni-Co电极相比,Ni-Co/MoS2复合电极析氢催化性能更高。
英文摘要:
      In order to improve the electrocatalytic hydrogen evolution activity of the Ni-Co alloy, MoS2 particles are added during the preparation. The electrodeposition behavior of Ni-Co/MoS2 composite electrode was studied by cyclic voltammetry and potentiometric step; The electrocatalytic hydrogen evolution performance of the composite electrode was investigated by cathodic polarization curve and electrochemical impedance in an alkaline environment. The results show that the MoS2 particles only adsorb to the surface of the electrode to change the active site of the electrode surface, without changing the reduction form of metal ions, reducing the nucleation relaxation time, increasing the nucleation rate, and completely transforming the nucleation process into instantaneous three-dimensional nucleation. When the potential is less than -1.0 V, the MoS2 particles promote the electrochemical reduction reaction. When the potential is greater than -1.0 V, the MoS2 particles suppress the electrochemical reduction reaction. The surface of the Ni-Co/MoS2 composite electrode becomes rough and porous, the surface area increases, and the hydrogen evolution catalytic performance of the electrode is greatly improved.
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