Study of the effect of precursor salts on the electrocatalytic properties of Ti-SnO2/Sb electrodes prepared by thermal decomposition

The physical and electrochemical properties of Ti-SnO2/Sb electrodes obtained by the thermal decomposition of solutions of the precursor salts SnCl(2)x2H(2)O/SbCl3 and SnSO4/Sb-2(SO4)(3) were investigated. The reversibility of the cyclic voltammetric response of the Fe(CN)(6)(4-)/Fe(CN)(6)(3-) redox couple was assessed using the obtained electrodes. Their catalytic activity for the oxygen-evolving reaction and maximum capacity for electronic transfer were also evaluated by potential and current linear scans in 0.5 mol L-1 H2SO4. Additionally, scanning electron microscopy analyses allowed the visualization of the morphology of the oxide films obtained. The best results were presented by the electrodes obtained from the chloride salt precursors.