A new dimensionally stable electrode based on the RuO2-Nb2O5 system prepared by a polymeric precursor method is described. The effects of the layer composition and preparation temperature on the electrochemical. morphological and microstructural characteristics and durability were investigated. An increase in the voltammetric anodic charge was observed, which has a maximum value for the nominal composition RuO2-Nb2O5 70:30 mol%. The voltammetric charge of the RUO2-Nb2O5 70:30 mol% electrodes was maximum for those prepared at 300 degrees C. A decrease in the voltammetric charge was detected as the preparation temperature increased, which could be related to the crystallization process and reduction of the surface area of the layer. X-ray diffraction patterns show the main peaks of RuO2 in rutile phase for nominal compositions higher than 30 mol% of RuO2. On the other hand, Nb2O5 orthorhombic crystalline phase was observed only for electrodes prepared at 600 degrees C. The highest value of the accelerated stability test (AST) for the oxygen evolution reaction (OER) was 22.0 h per mg of RuO2 for the Ti/RuO2-Nb2O5 70:30 mol% composition.