化学镀Ni-P/Co-Ni-P阴极具有很好的电催化性能和抗蚀性能，但在长期电位稳定性方面和抗反电流能力方面不能令人满意。在外层引入稀土元素La后，由于稀土元素特殊的外层电子结构，促进了它的抗氧化性能。化学镀Ni-P/Co-Ni-P(La)复合阴极，分别经120℃或350℃热处理，相对于同样条件下的化学镀Ni-P/Co-Ni-P阴极，长期电解的稳定电位下降60mV和10 mV，在抗反电流实验中平台电位也下降了80 mV和35mV，表现出良好的电位稳定性和抗反电流能力。%Ni- P/Co - Ni - P chemical plating cathodes show excellent electrocatalytic activity and corrosion resistance, but have less prolonged potential stability and corrosion resistance. The oxidization resistance of the cathode doped La in its outer layer increased because of special outer electronic structure of rare earth dement. Compared with the Ni - P/Co- Ni - P chemical plating cathode, the Ni - P/Co-Ni- P(La) chemical plating composite cathode heat- treated at 120 ℃ or 350 ℃ shows good prolonged potential stability and reverse- current resistance,with a reduction of 60 mV and 10 mV in stable potential in prolonged electrolysis and a reduction of 80 mV and 35 mV in stable potential in reverse- current resistance test respectively.
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