聚氧乙烯型表面活性剂对汞电极上氢析出过程的影响

聚氧乙烯型表面活性剂对汞电极上氢析出过程的影响 THE EFFECT OF NON-IONIC SURFACE ACTIVE SUBSTANCES ON HYDROGEN OVERVOLTAGE ON Hg 陆君濤 first-author 邓淑珍 查全性 1.本文釆用滴汞电极研究了聚氧乙烯型表面活性物質对酸性溶液中氢过电位的影响。結果表明这类活性物質能在很广的电位范围內均匀地提高氢过电位,但阻化效应比較小（△η≈50mv）。2.根据对极化曲线的分析,認为活性分子吸附层的阻化效应系由于表面反应的表现,使活化能增大,而氢析出过程反应机理并未改变。 The effect of non-ionic surface active substances of the poly-ethylene oxide type on hydrogen overvoltage （η） in acid solution was studied by using dropping mercury electrode.These surfactants raise η uniformly in the whole potential range investigated but their effect （△η） is rathen limited. Experimental results are in good accordance with results of adsorption studies and can be explained within the range of slow discharge theory by assuming that upon addition of surfactants alters activation energy of the discharge reaction but the mechanism of reaction is not changed. 1965-01-01 2021-04-01 Z1