Electrochemical on-surface synthesis of a strong electron-donating graphene nanoribbon catalyst.

Autor: Sakaguchi H; Institute of Advanced Energy, Kyoto University, Uji, 611-0011, Japan. sakaguchi@iae.kyoto-u.ac.jp., Kojima T; Institute of Advanced Energy, Kyoto University, Uji, 611-0011, Japan., Cheng Y; Institute of Advanced Energy, Kyoto University, Uji, 611-0011, Japan., Nobusue S; Institute of Advanced Energy, Kyoto University, Uji, 611-0011, Japan., Fukami K; Department of Materials Science and Engineering, Kyoto University, Kyoto, 606-8501, Japan.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Jul 29; Vol. 15 (1), pp. 5972. Date of Electronic Publication: 2024 Jul 29.
DOI: 10.1038/s41467-024-50086-6
Abstrakt: On-surface synthesis of edge-functionalized graphene nanoribbons (GNRs) has attracted much attention. However, producing such GNRs on a large scale through on-surface synthesis under ultra-high vacuum on thermally activated metal surfaces has been challenging. This is mainly due to the decomposition of functional groups at temperatures of 300 to 500 °C and limited monolayer GNR growth based on the metal catalysis. To overcome these obstacles, we developed an on-surface electrochemical technique that utilizes redox reactions of asymmetric precursors at an electric double layer where a strong electric field is confined to the liquid-solid interface. We successfully demonstrate layer-by-layer growth of strong electron-donating GNRs on electrodes at temperatures <80 °C without decomposing functional groups. We show that high-voltage facilitates previously unknown heterochiral di-cationic polymerization. Electrochemically produced GNRs exhibiting one of the strongest electron-donating properties known, enable extraordinary silicon-etching catalytic activity, exceeding those of noble metals, with superior photoconductive properties. Our technique advances the possibility of producing various edge-functional GNRs.
(© 2024. The Author(s).)
Databáze: MEDLINE
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