The carbon dioxide is a very strong and stable molecule, product of fossil fuel combustion and it’s a primary greenhouse gases, currently various studies of de conversion of CO₂ to usefull products have been conducted. However, for break the C=O bonds, requires a large external energy. The photoelectrochemical systems have been studied to use the light as the input energy for approach to overcome the high energy barrier of CO₂ conversion in to chemicals and fuels in a environment-friendly manner.In this work we report the study of a photocathode material for fuel generation from CO₂ reduction in a photoelectrochemical system, nanocompiste thin films of CuO/TiO₂ with various concentration of CuO (1%,3%,5%) were prepared with a dip coating and a thermal treatment. The absorption regions, the band gap (Eg), the Anastasa phase, the crystal size and the topography of the surface were identified, using UV-vis spectrophotometry, Raman spectroscopy and Atomic Force Microscopy (AFM) techniques, respectively. It was observed that depending on the percentage of CuO, the Eg of the material decreases from 3.33eV to 3.25eV and increases the absorption in the visible region, this would indicate that less energy is required to activate the surface of the material and to perform the photo-reduction of CO₂. And were evaluated in photoelectrochemical cell, with a KHCO₃ media, the cyclic voltamperometry reported a catodic peak associated to reduction of CO₂ in a -0.57 V vs (SCE) without illumination and a decrease to -0.37 V vs (SCE) whit illumination, this means that the material requires less energy supply for the reduction of CO₂ in the presence of light.