We report here photo-catalytic reduction of CO₂ to ethanol by Cu₂O nano catalyst dispersed onto p-type Si-wafer. The catalyst was synthesized by simple hydrothermal reaction of Cu(I) -acetate salt. The purified catalysts were characterized by AFM, TEM and XPS. A boron doped Si-wafer was spin coated with a thin film of aqueous dispersions of the catalyst for photo-reduction of CO₂. We observed signature of ethanol in NMR analysis of photo-reduction products. The mechanism of ethanol formation has been discussed.
Keywords: CO2 reduction; Photo catalyst; Acetate coated–copper oxide