化学镀Ni-P(Pr)/Co-P复合阴极的性能研究

化学镀Ni-P(Pr)/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20mV，在抗反电流实验中平台电位也下降了20mV左右，增强了电极稳定性。

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

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.