On the Mechanism of Formation of Electrochromic WO3Films on the Surface of Sn, Ti, ITO Electrodes in the Process of Cathodic Electrodeposition

Abstract—The mechanism of the electrochemical formation of WO3films on the surface of titanium, tin, and ITO electrodes is investigated under various regimes, including the deposition time τ = 2000–8000 s and the electrochemical potential of deposition on the cathode in the range from –0.4 to –1 V. A technique for the synthesis of peroxytungstic acid and a method of cathodic electrodeposition are presented. The studies carried out with tin and titanium extend the field of application of WO3films to technologies of chemical current sources and fuel cells.