On the impedance of galvanic cells: XXV. The double-layer capacitance of the dropping mercury electrode in 1 M HCl, 7.5 M HCl and 5.2 M HClO4 and the kinetic parameters of the hydrogen electrode reaction as a function of temperature in these solutions

摘要: Summary The impedance of the dropping mercury electrode in aqueous solutions 1 M HCl, 7.5 HCl and 5.2 HClO4, saturated with hydrogen at one atmosphere was measured temperatures between −39° +72° both outside potential region where reaction, e+H+ H2, proceeds. Analysis data gave information about kinetics reaction double-layer capacity. Exchange current densities transfer coefficients are reported. apparent heat activation is 21.1 kcal mole−1 for 19.5 11.1 HCl. In latter solution coefficient found to be a linear function temperature. HClO4 virtually independent hump capacity curve situated anodically zero charge but this reversed. capacity-potential curves show capacitance case occurs two potentials, either side charge.