纳米晶Ni—Mo合金复合镀层中钼含量对析氢反应的影响  

Effects of Molybdenum Content of Nanocrystalline Ni-Mo Alloy Composite Coating on Hydrogen Evolution Reaction

作　　者：马洁[1] 刘顺诚[1] 江琳才[2] 蒋雄[2] 

机构地区：[1]首都师范大学化学系,北京100037 [2]华南师范大学化学系,广州510631

出　　处：《化学学报》1997年第4期363-369,共7页Acta Chimica Sinica

基　　金：中国科学院"快速凝固非平衡态合金"国家重点实验室;北京市教委资助的课题

摘　　要：本文利用复合电镀的方法,将用高能机械球磨制备的纳米晶Ni—Mo合金粉制成对析氢反应有高催化性的电极.用X射线衍射仪、X射线光电子能谱仪测试了这些纳米晶的大小及复合镀层的组成,用稳态极化曲线及交流阻抗技术测试了这些电极析氢的电化学特性.实验结果表明:在本文研究的范围内镀层中钼含量的增加可以提高电极析氢的催化活性,电化学脱附是这些电极上析氢反应速度的决定步骤.A kind of highly catalytic electrode for the hydrogen evolution reaction (HER) was prepared by composite coating of nanocrystalline Ni- Mo alloy particles, made from high energy mechnical ball mill, on nickel base. The size of the nanocrystal of Ni-Mo alloy and the composition of the composite coating were measured by XRD and XPS. The electrochemical behaviour of the electrode for HER was studied by using of steady polarization and a. c. impedance technique It is shown that the electrocatalytic activity of the electrode is enhanced with increasing of molybdenum content in the composite coating and the reaction rate was determined by the electrodesorption step.

关 键 词：复合镀 析氢反应 纳米晶 钼含量 镍钼含量 

分 类 号：O646.54[理学—物理化学] O614.612[理学—化学]