Abstract
Abstract Potentiostatic and potentiodynamic experiments on Hg in 1 M HCl, HBr, and HI solutions were carried out to elucidate transient phenomena of the electrochemical mechanism of the hydrogen electrode reaction. The results obtained by both methods agree with the analysis of the non-steady state based on the electrochemical mechanism. The large effect of anions on the transient phenomena is satisfactorily interpreted by the change of repulsive force energy between H2+(a)’s on electrode, which is caused by the presence of specifically adsorbed anions in various degrees. The potential-sweep method reveals features of the step preceding the rate-determining step and gives the value of the repulsive force energy between H2+(a)’s as expected by the analysis.
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