【摘要】 采用线性电势扫描伏安法、循环伏安法、计时电势法、交流阻抗法研究了不同铕离子加入量的硫酸溶液中铅电极的电化学特性。实验结果表明:在硫酸溶液中添加铕离子后,改善了Pb与PbSO4间转化反应的可逆性;铕离子的存在提高了铅电极析氢电位;抑制了铅电极上氧化膜中高电阻的PbOn的生成,提高了氧化膜的导电性;阻碍了电极钝化现象的发生。铅在添加铕离子的硫酸溶液中的电化学特性与铕-铅合金在硫酸溶液中的规律相同。更多还原

【Abstract】 The influence of europium ion in sulfuric acid solution on the electrochemical performance of the lead electrode was studied by linear sweep voltammetry,cyclic voltammetry,chronoptentiometry and AC impedance methods.The experimental results showed that the addition of europium ion could effectively improve the reversibility of the transfer reaction of Pb/PbSO4 and the overpotential of hydrogen evolution reaction on the electrode in the existence of europium ion in sulfuric acid solution was higher than that in sulfuric acid solution.The passivation of the electrode was prevented and the conductivity of the film on the electrode was improved,because the growth of PbOn compounds was inhibited when the addition of europium ion in sulfuric acid solution.The effects of the addition of europium ion in sulfuric acid solution on the electrochemical performance of the lead electrode were the same as that of the addition of europium in lead to form europium-lead alloy in sulfuric acid solution.更多还原