CHARACTERIZATION AND EVALUATION OF IRIDIUM COBALTITE OXYGEN-EVOLVING ELECTRODES - INFLUENCE OF COMPOSITION AND TEMPERATURE OF PREPARATION

A catalytically active titanium electrode (CATE) based on 'mixed-cryst al' oxides of cobalt and iridium was prepared by pyrolysis of cobalt a nd iridium chlorides. The electrodes were tested electrochemically und er the O2 evolution condition, employing cyclic voltammetric and galva nostatic accelerated polarisation techniques in 0.5 M H2SO4. The struc tural and morphological aspects were also analysed using X-ray diffrac tion and scanning electron microscopy. From the data collected, the op timum composition and temperature were determined. The results are cor related and discussed.