Gold plasmon-induced photocatalytic dehydrogenative coupling of methane to ethane on polar oxide surfaces

Lingshu Meng; Zhenye Chen; Zhiyun Ma; Sha He; Yidong Hou; Hao-Hong Li; Rusheng Yuan; Xi-He Huang; Xuxu Wang; Xinchen Wang; Jinlin Long

doi:10.1039/C7EE02951A

Gold plasmon-induced photocatalytic dehydrogenative coupling of methane to ethane on polar oxide surfaces†

Lingshu Meng,^a Zhenye Chen,^a Zhiyun Ma,^a Sha He,^a Yidong Hou,^a Hao-Hong Li,

^a Rusheng Yuan,

^a Xi-He Huang,

^a Xuxu Wang,

^a Xinchen Wang

^a and Jinlin Long

*^a

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* Corresponding authors

^a State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China
E-mail: jllong@fzu.edu.cn

Abstract

This work shows the solar-driven dehydrogenative coupling of methane to ethane at room temperature. A solar-to-C₂H₆ 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 H₂, which is the rate-determining step of methane coupling.

Energy & Environmental Science

Gold plasmon-induced photocatalytic dehydrogenative coupling of methane to ethane on polar oxide surfaces†

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Gold plasmon-induced photocatalytic dehydrogenative coupling of methane to ethane on polar oxide surfaces

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