This paper describes the effect of the composition of the oxide films on the properties of electrodes Ti/M x Ti y Sn z O 2 (M = Ir or Ru) prepared by the polymeric precursor method. XRD studies showed that the anodes are formed by solid solutions. The electrodes containing IrO 2 exhibit lower activity for the oxygen evolution reaction. The doping of the electrode surface with SnO 2 improves the catalytic properties of the anodes. However, it should be held in appropriate compositions, because the change in the atomic ratio of this element shows a marked effect on the stability of