Photoreduction of carbon dioxide with hydrogen using temperature programmed method

The photocatalytic reduction of carbon dioxide with hydrogen was studied by Temperature-Programmed Surface Reaction (TPSR). This process was carried out in a flow reactor that was especially designed and constructed for this purpose. Titanium dioxide (TiO₂, Degussa P-25) was used as supports for platinum, ruthenium and nickel catalysts. The experimental results indicated that the activity of photoreduction of CO₂ changes as follows: Ru/TiO₂ > Ni/TiO₂ > = Pt/TiO₂ > TiO₂.