Lb. Kriksunov et al., ANODIC OXYGEN EVOLUTION REACTION AT HIGH-TEMPERATURES IN ACID-SOLUTIONS AT PLATINUM, Electrochimica acta, 39(1), 1994, pp. 137-142
The polarization curves of oxygen evolution and reduction at platinum
electrode were obtained in diluted aqueous solutions of sulfuric and p
erchloric acids in the temperature range 20-325 degrees C. The Tafel s
lopes of polarization curves of oxygen evolution are practically indep
endent of the temperature in the whole investigated temperature range.
The strong dependence of the transfer coefficient upon the temperatur
e is discussed in terms of the influence of adsorption of intermediate
s on the reaction kinetics. At highest temperatures, a rest potential
was observed which may correspond to the reversible oxygen potential.