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

Shaoshan Wang (1, 2) , Pengcheng Ding (1, 3) , Zhuo Li (1, 2) , Cristina Mattioli (4) , Wenlong E (2) , Ye Sun (3) , André Gourdon (5) , Lev N Kantorovich (6) , Flemming Besenbacher (7) , Xueming Yang (2) , Miao Yu (1, 2)

1 HIT - Harbin Institute of Technology
2 DICP - Dalian Institute of Chemical Physics
3 Center for Condensed Matter Science and Technology
4 CEMES - Centre d'élaboration de matériaux et d'études structurales
5 CEMES-GNS - Groupe NanoSciences
6 King‘s College London
7 iNANO - Interdisciplinary Nanoscience Center

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.

Keywords: Carbon doping; local charge; on-surface synthesis; catalysis; displacement reaction

Domains: Organic chemistry; Chemical Physics [physics.chem-ph]; Other [cond-mat.other]

Shaoshan Wang, Pengcheng Ding, Zhuo Li, Cristina Mattioli, Wenlong E, et al.. Subsurface Carbon‐Induced Local Charge of Copper for On‐Surface Displacement Reaction. Angewandte Chemie International Edition, 2021, ⟨10.1002/anie.202108712⟩. ⟨hal-03342691⟩