Abstract
The evolution of hydrogen on bright platinum and graphite electrodes during the electrolysis of molten potassium bisulphate was studied. The kinetic parameters of the reaction were determined by measuring the potential/current-density curves and the transient of the electrode potential when current was switched on or off.The kinetics of the reaction are satisfactorily explained assuming that the rate determining step in the mechanism of the reaction is Me + H+ + e → Me…H.The experimental value of the heat of activation is related to the heat of activation of the rate-determining step. It is suggested that hydrogen ions in the melt are bonded, forming part of larger entities.
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