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Subsurface Carbon-Induced Local Charge of Copper for On-Surface Displacement Reaction

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Shaoshan Wang, Pengcheng Ding, Zhuo Li, Christina Mattioli, Wenlong E, Ye Sun, Andre Gordon, Lev Kantorovich, Flemming Besenbacher, Xueming Yang, Miao Yu

Original languageEnglish
JournalANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Accepted/In press24 Aug 2021

King's Authors

Abstract

Transition metal carbides have sparked unprecedented enthusiasm as high-performance catalysts in recent years. Still, the catalytic properties of copper (Cu) carbide remain unexplored. By introducing subsurface carbon (C) to Cu(111), displacement reaction of proton in carboxyl acid group with single Cu atom is demonstrated at the atomic scale and room temperature. Its occurrence is attributed to the C-doping induced local charge of surface Cu atoms (up to +0.30 e/atom), which accelerates the rate of on-surface deprotonation via reduction of the corresponding energy barrier, thus enabling the instant displacement of a proton with a Cu atom when the molecules land on the surface. Such well-defined and robust Cu+ surface based on the subsurface C doping offers a novel catalytic platform for on-surface synthesis.

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