The voltammetric measurements of some titanium anodes coated with Co3O4 + S
nO2 + Sb2O3 and pure Co3O4 were performed in alcaline solution. The results
were compared with those obtained using MnO2 coated electrodes. The electr
ocatalytic activity and the adsorption reversibility of the electroactive s
pecies responsible for the oxygen evolution were discussed.