The influence of NixCo1-x-oxide composition (0 <= x <= 1) on the material's electrocatalytic activity in the oxygen evolution reaction (OER) was studied in the acidic medium. The electroactive oxide was formed by thermal decomposition of corresponding metal salt solutions on a titanium substrate. The surface of NixCo1-x-oxide coatings was found to be composed of crystalline NiO, Co3O4 and CoO, and the surface morphology/roughness was found to be composition-dependant. The electrocatalytic activity of the oxides in the OER was determined to be highly dependent on their relative metal ratio in the oxide, with Ni0.4Co0.6-oxide offering the highest intrinsic activity and good stability. Although still inferior to state-of-the-art IrO2, Ni0.4Co0.6-oxide was deemed as a potentially good replacement anode material in the acidic medium due to its significantly lower cost.