6533b7d6fe1ef96bd1266fca
RESEARCH PRODUCT
A Solar Photothermocatalytic approach for the CO2 conversion: Investigation of different synergisms on CoO-CuO/Brookite TiO2-CeO2 catalysts
Antonino GulinoLuca SpitaleriMarcello CondorelliLuisa D'ursoLeonardo PalmisanoStefano Andrea BalsamoRoberto FiorenzaMarianna BellarditaSalvatore Scirèsubject
Brookite TiO2Cerium oxideMaterials scienceBrookiteGeneral Chemical EngineeringBimetallic oxidesGeneral ChemistryIndustrial and Manufacturing EngineeringMethaneCatalysisPhotothermo-catalysischemistry.chemical_compoundchemistryChemical engineeringvisual_artPhotocatalysisvisual_art.visual_art_mediumEnvironmental ChemistryCO2valorizationBimetallic stripCarbon monoxideElectrochemical reduction of carbon dioxideCeO2description
Abstract The photoactive features of the least common polymorph of TiO2, i.e. brookite, were combined with the thermocatalytic redox ones of cerium oxide, focusing on the effects of the addition of small amounts of Co-Cu oxides for the solar CO2 conversion. By considering the characterization data, a surface segregation of the hosted metal oxides on the TiO2-CeO2 composite was evidenced, and their presence increased the amount of oxygen vacancies and improved the charge carriers separation. The bimetallic oxides-based sample was the most performing one in the photocatalytic carbon dioxide reduction at room temperature. The formation of carbon monoxide and methane was 5 and 0.5 μmol g−1h−1, respectively, i.e. about 10 times higher than that found with bare brookite. A further enhancement was obtained with the same CoO-CuO/TiO2-CeO2 catalyst applying the photothermal approach. The CO2-TPD and the FTIR measurements highlighted the high interaction between CO2 and the surface sites.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-01-01 |