Effects of microstructures of Ti anode coating with two constituents and three constituent (RuO₂-SnO₂-TiO₂) on the electrochemical properties

RuO₂-TiO₂ coating and RuO₂-SnO₂-TiO₂ coating of titanium(Ti) anode were obtained by thermal decomposition. The microstructure and the electrochemical performance of these Ti anode coating were examined by means of SEM, XRD and polarization curves. The results show that RuO₂-SnO₂-TiO₂ coating of titanium anode has high performance with 1.128 V and 1.674 V of tomography potential of chlorine and oxyen respectively at drying temperature of 130 ℃, sintering temperature of 500 ℃, holding time of 15 min and annealing time of 1 h. Adding Sn to RuO₂-TiO₂ coating of titanium anode will reduce Ru usage and decrease the costs for titanium anode. The presence of SnO₂ can improve catalytic activity, and reduce tomography chlorine and oxygen potential of coating surface for titanium anode, which will increase the lifetime of titanium anode.