鉛電解精製の電極反応におよぼす溶存酸素および表面活性剤の影響

白金電極を使用した場合

抄録

In this experiment, the current density of the oxidation and the reduction, the amount of electricity of the lead dissolution from the anode, and the diffusion coefficient of H₃O⁺at a fast step reaction were measured, using a platinum electrode and the potential scanning method, to determine the influence of the dissolved oxygen and the surface active agent in the lead electrolyte.
The results obtained are as follows:
1) It was shown by anodic scanning that the dissolved oxygen in the electrolyte has an effect on the form process of the oxygen adsorption layer and the evolution process of the oxygen.
2) The amounts of electricity of lead diffusion from the anode are constant in the concentration range of 60-100 g/lH₂SiF₆, but the amount of electricity increases proportionally with, the lead concentration. The effects of the surface active agent on the amounts of electricity were studied.
3) It was observed that the diffusion process of H₃O⁺, indicated by a peak I h, exists in the cathodic scanning wave, except in case of added phenol in the electrolyte. The diffusion coefficientD_Hof H₃O⁺is influenced by the concentration of Pb, H₂SiF₆and surface active agent, and in this experiment, the value of the region of 0.92×10^-6cm²/sec-0.50×10^-5cm²/sec was obtained.
4) The relation of the current density and the potential of the peak by multiple regression analysis were analysed. The resulting ratios of Iph equations obtained were about 80 percent in case of the added protein in the electrolyte.