Composite Co-P-Sc2O3 electrolytic layers were obtained in galvanostatic conditions on a copper substrate at temperature 298 K in the current density range from 0.0039 to 0.062 A cm(-2), from a cobalt electrolyte containing a suspension of Sc2O3. For comparison, Co-P layers were also obtained in the same current conditions. Using the potentiodynamic method, the polarization curve was plotted for the process of oxygen electroevolution from the KOH solutions. On this basis it was possible to determine the values of the Tafel equation parameters for the oxygen evolution process. These values were then taken as the criteria for evaluating oxygen evolution capacity on the composite layers and on the Co-P layers not containing Sc2O3.