THE OXYGEN EVOLUTION REACTION ON RUO2-TIO2 ELECTRODES

An investigation has been made of the O//2 evolution reaction on RuO//2-TiO//2 anodes using ac impedance and linear potential sweep curves together with steady state i-E curves. Using the equipment practically any combination of electrochemical techniques can be effected automatically; however in this case ac impedance and linear sweeps seemed to be the most appropriate from previous work in this field. Some special requirements arise in this system due to the large real area of the electrodes and their high value of the differential capacity. The ac currents for a particular ac potential are large while the dc current can be small. The problems are dealt with by the equipment which optimizes for these conditions. From the data obtained inferences can be drawn concerning the kinetics and mechanism of O//2 evolution as well as the electrochemical characteristics of the RuO//2-TiO//2 anodes.