Influence of heat treatment temperature on the electro-catalytic behaviour of nanostructure RuO2-TiO2 coating for the chlorine evolution reaction

60RuO₂-40TiO₂ coating was deposited on titanium substrate by the thermal decomposition of chloride solution. The mixed oxide thin film was prepared in different heat treatment temperatures. The effect of heat treatment temperature on the electro-catalytic performance of the mixed oxide coating during chlorine evolution was evaluated. Coated anodes were studied by field emission scanning electron microscopy and X-ray diffraction. Chlorine evolution was studied in 5 M NaCl solution by potentiodynamic current potential curves. Heat treatment temperature has the most significant effect on electro-catalytic activity of the coating. High heat treatment temperature deteriorates electro-catalytic performance of coating for chlorine evolution reaction. Low ratio of the active 101 crystallographic faces observed in high temperature can reduce the current density for gas evolution.