An electrodeposition process from an aqueous bath of CdSO 4 , SeO 2 and Hg 2 Cl 2 at pH 2.3 was performed to synthesize two Hg 1-x Cd x Se alloys with x ≥ 0.8 onto TiO 2 . In order to establish an intimate contact between Hg 1-x Cd x Se and the TiO 2 substrate, electrodeposition of Hg 1-x Cd x Se films was investigated. Reduction processes of H 2 SeO 3 and Cd 2+ to produce CdSe and Hg 1-x Cd x Se were studied by cyclic voltammetry. Initially, deposition of selenium allows codeposition of Cd 2+ and Hg 2+ . Hg 1-x Cd x Se film was obtained by holding the electrode at a constant potential. The characterization of the films was performed by GIXRD, FESEM, and the chemical composition of the film was obtained by energy-dispersive X-ray spectroscopy, photoluminescence and Raman spectroscopy.