Abstract
The current research on the CO2RR process mainly focuses on the high selectivity of a single product and the material selectivity in the path process [1],[2] Guo et al ., 2019. There are relatively few studies on changes and causes. In this work, TiO2/TiO formed by in-situ oxidation was used as a photocatalyst for CO2 reduction. The structure of this semiconductor/metal-like heterojunction makes the internal electric field appear in the catalyst, which greatly improves the activity of the photocatalytic reaction. During the test, it was found that the hydrogenation product gradually appeared in the reaction product due to the appearance of TiO2. In the absence of a sacrificial agent, the catalyst exhibited a high HCOOH selectivity and obtained a considerable yield of 46.37 μmol g−1h−1. After adding the sacrificial agent triethanolamine (TEOA), TiO2/TiO showed good CO production ability. As the reaction progressed, CH4 was gradually produced. DFT calculations confirmed that the structure of the heterojunction has lower workfunction for the CO2 hydrogenation option, and the energy band at the contact position is curved. The construction of this system has guiding significance for the construction of light-driven CO2 hydrogenation products in the future.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.