Facile mechanochemical preparation of nitrogen and fluorine co-doped graphene and its electrocatalytic performance

The possibility of low-temperature preparation of graphene co-doped with nitrogen and fluorine by mechanochemical nanostructuring of graphite in the presence of solid ammonium fluoride with subsequent removal of the salt by sublimation, as well as liquid exofoliation up to monolayer state of the res...

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Bibliographic Details
Published in:Carbon (New York) 2019-11, Vol.152, p.274-283
Main Authors: Posudievsky, O.Yu, Kondratyuk, A.S., Kozarenko, O.A., Cherepanov, V.V., Dovbeshko, G.I., Koshechko, V.G., Pokhodenko, V.D.
Format: Article
Language:English
Subjects:
Dopamine
Fluorine
Graphene
Low temperature
Micrometers
Nanostructured materials
Nitrogen
Oxidation
Oxygen reduction reactions
Semiconductor doping
Solvents
Spectral methods
Sublimation
Thickness
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Summary:The possibility of low-temperature preparation of graphene co-doped with nitrogen and fluorine by mechanochemical nanostructuring of graphite in the presence of solid ammonium fluoride with subsequent removal of the salt by sublimation, as well as liquid exofoliation up to monolayer state of the resulting few-layer graphene in various solvents, was shown for the first time. The doping of graphene with nitrogen and fluorine was proved by mutually complementary spectral methods. It was shown that the doped graphene particles had the lateral size of up to several micrometers and their thickness was about 0.75 nm. It was established that the resulting doped graphene forms stable highly concentrated dispersions in water and some organic solvents. It was found that the doped few-layer graphene is characterized by the high electrocatalytic activity in oxygen reduction reaction and the ability to discriminate the electrochemical response for biologically active compounds with close oxidation potentials (dopamine, ascorbic and uric acids). [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2019.06.031