The photochemical reduction of CO2 in the presence of H2O to form CO, CH4, and other light gases with industrial value is an interesting approach for dealing with CO2 emissions while simultaneously generating revenue to offset carbon capture and storage costs. Delafossite materials of the general stoichiometry ABO2 are a new class of photocatalysts being considered for this application. The photochemical activity of CuAlO2, CuAl0.9Fe0.1O2, CuGaO2, and CuGa1-xFexO2 (x=0.05, 0.10, 0.15, 0.20) for the reduction of CO2 will be presented. Additionally, the observed optical spectra will be compared to the theoretical band structures in these systems to better understand how B-site alloying can be used to control the optical activity of these materials for photochemical applications. Similarly, the calculated band edge positions will be compared to CO2 reduction and H2O oxidation potentials to better understand the reaction products and yields observed experimentally.

Photochemical reduction of CO<sub>2</sub> using delafossite oxides

244th National Meeting (2012)

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Photochemical reduction of CO2 using delafossite oxides

Photochemical reduction of CO₂ using delafossite oxides