Cathodes with compound coating modified with metal oxides

The paper deals with investigations on the influence of the chemical composition of alloyed compound coatings modified with metal oxides. The effect of different additives on the physico-chemical properties of nickel electrodes covered with a coating of the alloy nickel-cobalt-phosphorus subjected to a test analysis in an alkaline solution with an addition of iron(III) salt as a substance poisoning the surface of the electrodes has been determined. As additives the following binary oxides were applied: RuO2-TiO2, TiO2-CeO2, Co3O4-CeO2, Co3O4-MnO2, Co3O4-Pt, Co3O4-RuO2. The highest electrochemical activity was achieved in the case of Co3O4-MnO2 coating.