High-Quality Graphene Using Boudouard Reaction

Advanced Science. 2022. Vol. 9. No. 12. Article 2200217.

Grebenko A. K., Krasnikov D. V., Bubis A., Stolyarov V., Vyalikh D., Makarova A., Fedorov A., Ionov A. M.

Following the game-changing high-pressure CO (HiPco) process that
established the first facile route toward large-scale production of single-walled
carbon nanotubes, CO synthesis of cm-sized graphene crystals of ultra-high
purity grown during tens of minutes is proposed. The Boudouard reaction
serves for the first time to produce individual monolayer structures on the
surface of a metal catalyst, thereby providing a chemical vapor deposition
technique free from molecular and atomic hydrogen as well as vacuum
conditions. This approach facilitates inhibition of the graphene nucleation
from the CO/CO2 mixture and maintains a high growth rate of graphene
seeds reaching large-scale monocrystals. Unique features of the Boudouard
reaction coupled with CO-driven catalyst engineering ensure not only
suppression of the second layer growth but also provide a simple and reliable
technique for surface cleaning. Aside from being a novel carbon source,
carbon monoxide ensures peculiar modification of catalyst and in general
opens avenues for breakthrough graphene-catalyst composite production.

Keywords: graphene, графен, химический синтез, Chemical vapor deposition, Boudouard reaction, газовый транспорт