电解水析氢的Ni—S非晶态合金电极的研究

用电沉积法在含有硫代硫酸内的电镀液中制备Ｎｉ－Ｓ合金电极。该电极在５ｍｏｌ／ＬＮａＯＨ溶液，８０℃作析氢反应的电极，实验结果表明，硫含量为２９．４％的非晶态合金电极对氢的析出反应具有优良的催化性能，在１５０ｍＡ／ｃｍ２的电流以密度下，析氢反应的超电压压约为８２ｍＶ。它在连续或间歇电解条件下均具有良好的电化学稳定性。并用ＸＲＤ及ＳＥＭ研究了此合金电极在电解前后的组织结构特点。

Ni-S ALLOY AS THE ELECTRODE FOR HYDROGEN EVOLUTION REACTION OF ALKALINE WATER ELECTROLYSIS

Ni-S alloy electrode was prepared by means of electrodeposition The plating solution contained Na 2S 2O 3 The electrocatalytic activity of the alloy electrode for hydrogen evolution reaction in 5mol/L NaOH solution at 80℃ was investigated The results showed that the amorphous Ni-Salloy eletrode, in which S content was 29 4%, had high electrocatalytic activity, with hydrogen overpotential about 82 mV at 150mA/cm 2 In addition, the amorphous Ni-S alloyelectrode showed excellent stability during longterm continuou selectrolysis and a testwith frequent long and short power interruptions as well as with short circuitings Also, the morphology and structure of the Ni-S alloyelectrode before and afterelectrolysi swere studied by SEM observation and x-ray diffraction