Electrolysis Of Seawater Using The Ru-ti-ir Oxide Anode Coating Developed

Electrolyzing seawater is a very effective technique in preventing marine facilities from organic pollutants, and the anode materials are crucial for a successful application of this technique. The application of metal oxide anode coatings made in China is greatly restricted due to their defects such as low electrocatalytic activity and short service life. The oxide anode coatings with different compositions have been prepared to improve the properties but there is little substantially breakthrough.The effect of preparation factors on the properties of Ru-Ti-Ir anode coating prepared by thermal decomposition was investigated systemically, and the mechanism of deactivation was also studied in this paper. The properties of Ru-Ti-Ir anode coating were improved by addition of scarce Sn element. The influence of preparation method was researched at last.The influence of formula and solvent on the anode coatings was gained by the orthogonal analysis, and the physical and electrochemical properties of the anode coatings were characterized by scanning electron microscope(SEM), energy dispersive X-ray detector (EDX), X-ray diffraction(XRD), accelerated life, the potential of chlorine evolution, current efficiency, polarization curve, cyclic voltammetry and electrochemical impedance spectroscopy (EIS) tests. The results showed that the best formula of Ru-Ti-Ir oxide anode coating was Ru:Ir:Ti =U:Z:(100-U-Z) (mol%), and the solvent was n-butanol. The mixed solvent of isopropanol and n-butanol was beneficial to the durability of the anode coatings, but the potential of chlorine evolution increased and current efficiency reduced because of the addition of isopropanol at the same time.There was an obvious effect of the solution concentration on the morphology of the coatings. The superficial cracks increased and became wider and deeper as the solution concentration increased. The superficial agglomerates of anode coatings could hardly separated out when the cracks increased to certain degree. From the point of process procedure and performance, the solution...