Influence of thiourea on the activation energy of the electroreduction process of Zn(II) in mixed solvents on the mercury electrode

摘要

The kinetics of the Zn-II electroreduction has been studied in H2O, H2O + methanol (MeOH), H2O + dimethylsulfoxide (DMSO) mixtures as well as in these solutions with an addition of thiourea (TU) as a function of temperature. The diffusion coefficients, the formal potentials and the standard rare constants have been determined. These measurements made it possible to obtain the real activation energy of the electrode process. The presence of TU decreased the values of the real energy of activation of the electrode process in all the investigated solutions. [References: 19]