TEMPERATURE-DEPENDENCE OF THE OXYGEN EVOLUTION REACTION ON THE PB PBO2 ELECTRODE/

Upon temperature increase the Tafel dependence of the evolution of oxy gen on a PbO2 layer formed anodically on Pb shifts toward higher curen ts. The dependence of the activation energy of the elementary processe s involved in the oxygen evolution reaction on electrode potential is determined from Arrhenius curves. Upon increase in potential the activ ation energy increases, passing through a maximum, and decreases there after. This change in activation energy is explained by the mechanism of the elementary processes of the oxygen evolution reaction in which the hydrated layer of the lead dioxide is also involved.