Version 1
: Received: 10 October 2024 / Approved: 10 October 2024 / Online: 10 October 2024 (09:10:24 CEST)
How to cite:
Ni, S.; Wu, W.; Yang, Z.; Zhang, M.; Yang, J. Influence of Copper Valence in CuOx/TiO2 Catalysts on the Selectivity of Carbon Dioxide Photocatalytic Reduction Products. Preprints2024, 2024100761. https://doi.org/10.20944/preprints202410.0761.v1
Ni, S.; Wu, W.; Yang, Z.; Zhang, M.; Yang, J. Influence of Copper Valence in CuOx/TiO2 Catalysts on the Selectivity of Carbon Dioxide Photocatalytic Reduction Products. Preprints 2024, 2024100761. https://doi.org/10.20944/preprints202410.0761.v1
Ni, S.; Wu, W.; Yang, Z.; Zhang, M.; Yang, J. Influence of Copper Valence in CuOx/TiO2 Catalysts on the Selectivity of Carbon Dioxide Photocatalytic Reduction Products. Preprints2024, 2024100761. https://doi.org/10.20944/preprints202410.0761.v1
APA Style
Ni, S., Wu, W., Yang, Z., Zhang, M., & Yang, J. (2024). Influence of Copper Valence in CuO<sub>x</sub>/TiO<sub>2</sub> Catalysts on the Selectivity of Carbon Dioxide Photocatalytic Reduction Products. Preprints. https://doi.org/10.20944/preprints202410.0761.v1
Chicago/Turabian Style
Ni, S., Min Zhang and Jianjun Yang. 2024 "Influence of Copper Valence in CuO<sub>x</sub>/TiO<sub>2</sub> Catalysts on the Selectivity of Carbon Dioxide Photocatalytic Reduction Products" Preprints. https://doi.org/10.20944/preprints202410.0761.v1
Abstract
The Cu cocatalyst supported on the surface of TiO2 photocatalysts has demonstrated unique activity and selectivity in photocatalytic CO2 reduction. The valence state of copper significantly influences the catalytic process; however, due to the inherent instability of copper's valence states, the precise role of different valence states in CO2 reduction remains inadequately understood. In this study, CuOx/TiO2 catalysts were synthesized using an in-situ growth reduction method, and we investigated the impact of various valence copper species on CO2 photocatalytic reduction. Our results indicate that Cu+ and Cu0 serve as primary active sites, with the selectivity for CH4 and CO products during CO2 photoreduction being closely related to their respective ratios on the catalyst surface. The adsorption and activation mechanisms of CO on both Cu+ and Cu0 surfaces are identified as critical factors determining product selectivity in photocatalytic processes. Furthermore, it is confirmed that Cu+ primarily facilitates CH4 production while Cu0 is responsible for generating CO. This study provides valuable insights into developing highly selective photocatalysts.
Keywords
Photocatalytic CO2 reduction; TiO2; Cu valence state; Production selectivity; Cocatalyst
Subject
Chemistry and Materials Science, Physical Chemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
