The integral capacitance,kinetics and mechanisms of the Cu/Cu(II) system in sulphuric acid media

Galvanostatic investigation has been carried out on the Cu/Cu(II) system 2 M H₂SO₄ + 0.7 M CuSO₄, at 298 K. The pseudo-capacitance (integral capacitance) has been extracted as a function of overvoltage from the portion of the charging curve prior to plateaux. It has been found that the pseudo-capacitance, for both anodic and cathodic processes depended upon the current density and time. On the basis of the above findings the reaction mechanism has been suggested to be Cu?Cu(I)_ad^v + ve^?, Cu(I)_ad^v?Cu(I) + (1 ? v)e^?, Cu(I)?Cu(II)e^?.