硫酸溶液中Eu3+铅钙合金电极特性的影响

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Eu3+加入量的硫酸溶液中铅钙合金电极的电化学特性.实验结果表明:在硫酸溶液中添加Eu3+后,改善了Pb与PbSO4间转化反应的可逆性；Eu3+的存在提高了铅电极析氢电位；抑制了铅钙合金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...

The influence of europium ion in sulfuric acid solution on the performance of the lead-calcium alloy electrode

The influence of europium ion in sulfuric acid solution on the electrochemical performance of the lead-calcium alloy 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 over potential of hydrogen evolution reaction on the electrode where the existence of europium ion was higher than that in sulfuric acid solution, at the same time, the growth of PbO, compounds was inhibited in the film of the lead-calcium alloy, indicating that the conductivity of the film was increased, while the passivation of electrode was prevented. The effect of the addition of europium ion in sulfuric acid solution on the characteristics of lead-calcium alloys was the same as rare earth-lead-calcium alloys in sulfuric acid solution.