Abstract:The titanium anode with sandwich coating structure was prepared by a sol-gel method. The anode was composed of three layers by firstly the oxide based layer coated with Ti70%-Ru30% on the titanium substrate, and then the inter-layer coated with Ir70%-Ta30%, the surface layer coated with Ti70%-Ru30%. The physical and electrochemical properties of the titanium anode with sandwich structure were studied by XRD, electrode potential, polarization curve, cyclic voltammetry and accelerated life tests. The results showed that the anode coating is composed mainly of rutile phases (Ti, Ru)O2, IrO2 and amorphous Ta2O5. The titanium anode has excellent electro-catalysis activities for both chlorine evolution and oxygen evolution. In the electrochemical conditions for chlorine evolution, the anode can keep better potential stabilities, and also shows a strong anticorrosive property for electrolyzing at high current density and in the high acidity. As the result, the titanium anode act as a good anode for both chlorine evolution and oxygen evolution