(Invited) Highly Concentrated CO Evolution for Photocatalytic Conversion of CO2 By H2o As an Electron Donor

Monday, 29 May 2017: 08:40
Churchill C1 (Hilton New Orleans Riverside)
K. Teramura (Department of Molecular Engineering, Kyoto University)
We should therefore attempt to develop industrial processes using CO2 as a feedstock and H2O as an electron donor in order to build a sustainable society in the near future. If H2O does function as the electron donor, then it is important to obtain a stoichiometric ratio between the amount of O2 evolved and the amount of CO2 reduced. Moreover, the reduction of H+, released from H2O molecules, usually competes with CO2 reduction when several heterogeneous materials are used as photocatalysts for the reduction of CO2 with H2O. Generally, the production of H2 via the reduction of H+ is the dominant pathway. Therefore, to achieve high selectivity in the photocatalytic conversion of CO2 with H2O, the electrons generated through the oxidation of H2O must be controlled to selectively. These days, we found that Ag/ZnGa2O4/Ga2O3, Ag/La2Ti2O7, Ag/SrO/Ta2O5, Ag/ZnGa2O4, and Ag/ZnTa2O6 exhibit good conversion of CO2 and high selectivity toward CO evolution for the photocatalytic conversion of CO2 by H2O as an electron donor.