化学镀Ni-P(Pr)/Co-P复合阴极的性能研究  

Studies on the Properties of Electroless Ni-P(Pr)/Co-P Complex Cathodes

作　　者：胡瑞英[1] 崔秀良[1] 王强[1] 陈康宁[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《华东师范大学学报（自然科学版）》2002年第1期61-68,共8页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金 (5 95 82 0 0 7)

摘　　要：化学镀Ni P/Co P复合阴极具有很好的电催化性能 ,但在稳定性方面尚有欠缺 ,在内层引入稀土Pr后 ,由于稀土元素特殊的外层电子结构 ,促进了内层非晶化过程 ,提高了镀层的致密性和耐蚀性。化学镀Ni P(Pr) /Co P复合阴极 ,相对于Ni P/Co P复合阴极 ,长期电解的稳定电位降低了 2 0mV ,在抗反电流实验中平台电位也下降了 2 0mV左右 ,增强了电极稳定性。Electroless Ni-P/Co-P complex cathodes show good electrocatalytic activity for hydrogen evolution in basic solutions, but they are less stable in prolonged electrolysis and reverse-current test. By doping Pr in the inner layer, owing to the special electronic structure of the rare earth element, which help to promote non-crystallization of Ni-P and stabilize it, the new electroless cathodes gain high surface uniform and corrosion-resistance. Compared with Ni-P/Co-P cathodes, Ni-P(Pr)/Co-P cathodes, with an overpotential reduction of 20 mV each in the prolonged electrolysis and in the cyclical obverse-reverse-current test ,show improved electrochemical stability for hydrogen evolution.

关 键 词：化学镀 Ni-P(Pr)/Co-P复合阴极 非晶态 稳定性 电催化性能 析氢活性 Ni-P/Co-P复合阴极 

分 类 号：O646.541[理学—物理化学]