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- Title
Photocatalytic Coupling of CH<sub>4</sub> and CO<sub>2</sub> to Ethanol on Asymmetric Ce-O-Zn Sites.
- Authors
Shuya Hao; Yangshen Chen; Chen Peng; Huining Wang; Qianyou Wen; Cejun Hu; Lijuan Zhang; Qing Han *; Gengfeng Zheng *
- 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.
- Subjects
ASYMMETRIC synthesis; CERIUM oxides; STEAM reforming; ELECTRON paramagnetic resonance
- Publication
Advanced Functional Materials, 2024, Vol 34, Issue 17, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202314118