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Gold plasmon-induced photocatalytic dehydrogenative coupling of methane to ethane on polar oxide surfaces
Ist Teil von
Energy & environmental science, 2018-01, Vol.11 (2), p.294-298
Ort / Verlag
Cambridge: Royal Society of Chemistry
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
This work shows the solar-driven dehydrogenative coupling of methane to ethane at room temperature. A solar-to-C
2
H
6
energy conversion efficiency of 0.08% was achieved on the polar surface of Au/ZnO porous nanosheets (NSs), where methane C–H bonds are polarized and dissociated by the local electric field normal to the polar {001} plane, and finally converted into ethane and hydrogen through a radical coupling pathway. Mechanistic studies suggest that the Au-plasmon-induced resonance energy transfer modulates charge carrier energetics to trigger the stoichiometric conversion. Hot electrons reduce protons to H
2
, which is the rate-determining step of methane coupling.