Yu, X, Zholobenko, VL, Moldovan, S, Hu, D, Wu, D, Ordomsky, VV and Khodakov, AY (2020) Stoichiometric methane conversion to ethane using photochemical looping at ambient temperature. Nature Energy. ISSN 1520-8524

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Methane activation and utilization are among the major challenges of modern science. Methane is potentially an important feedstock for manufacturing value-added fuels and chemicals. However, most known processes require excessive operating temperatures and exhibit insufficient selectivity. Here, we demonstrate a photochemical looping strategy for highly selective stoichiometric conversion of methane to ethane at ambient temperature over silver–heteropolyacid–titania nanocomposites. The process involves a stoichiometric reaction of methane with highly dispersed cationic silver under illumination, which results in the formation of methyl radicals. Recombination of the generated methyl radicals leads to the selective, and almost quantitative, formation of ethane. Cationic silver species are simultaneously reduced to metallic silver. The silver–heteropolyacid–titania nanocomposites can be reversibly regenerated in air under illumination at ambient temperature. The photochemical looping process achieves a methane coupling selectivity of over 90%, a quantitative yield of ethane of over 9%, high quantum efficiency (3.5% at 362 nm) and excellent stability.

Item Type: Article
Additional Information: The final accepted manuscript can be found at; https://www.nature.com/articles/s41560-020-0616-7 And extra information regarding reprint and use of this paper can be found at; https://www.nature.com/nature-research/reprints-and-permissions
Uncontrolled Keywords: Heterogeneous catalysis; Natural gas; Photocatalysis; Solar energy
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Q Science > QD Chemistry > QD415 Biochemistry
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 22 May 2020 15:19
Last Modified: 18 Nov 2020 01:30
URI: https://eprints.keele.ac.uk/id/eprint/8005

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