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Photocatalytic Coupling of CH4 and CO2 to Ethanol on Asymmetric Ce-O-Zn Sites.
- Source :
-
Advanced Functional Materials . 4/25/2024, Vol. 34 Issue 17, p1-7. 7p. - Publication Year :
- 2024
-
Abstract
- Partial oxidation of methane (CH4) to value-added products is significantly challenging due to the highly inert chemical property of CH4 at ambient conditions and easy over-oxidation into carbon dioxide (CO2) or carbon monoxide (CO) at elevated temperatures and pressures. Targeting this challenge, the efficient photocatalytic coupling of CO2 and CH4 into ethanol is demonstrated, using a cerium (Ce)-doped zinc oxide (ZnO) photocatalyst with abundant Ce--O--Zn units. Under light illumination, CO2 is adsorbed on the Ce atoms and photo-reduced to CO, and CH4 is captured by the Zn atoms and photo-oxidized to hydroperoxymethane (CH3OOH). The close proximity of Ce and Zn atoms on the Ce--O--Zn units allowed to further efficiently couple the as-formed CO and CH3OOH into ethanol. Without additional Oxygen (O2) oxidant or sacrificial regent, the ethanol production rate reached 580 µmol g-1 h-1, substantially exceeding previously reports on photocatalytic CH4 oxidation. This work features to convert two greenhouse gases into value-added chemicals with adjacent and asymmetric reaction sites, suggesting attractive potentials for CH4 and CO2 utilization. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1616301X
- Volume :
- 34
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- Advanced Functional Materials
- Publication Type :
- Academic Journal
- Accession number :
- 177641600
- Full Text :
- https://doi.org/10.1002/adfm.202314118