Chalcogen Atom-Doped Graphene and Its Performance in N2 Activation

Navaratnarajah Kuganathan

doi:10.3390/surfaces5020016

Chalcogen Atom-Doped Graphene and Its Performance in N2 Activation

Navaratnarajah Kuganathan

Centre for Manufacturing and Materials

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Abstract

In this work, we studied dispersion correction, adsorption and substitution of chalcogen dopants (O, S, Se and Te) on the surface of graphene using density functional theory. The results reveal that a single oxygen atom is more preferred for adsorption onto the graphene surface than the other dopants, with an adsorption energy of −0.84 eV. The preference of this dopant is evidenced by a greater charge transfer of 0.34 electrons from the graphene surface to the oxygen. The substitutional doping of oxygen is energetically more favourable than the doping of other atoms. While nitrogen activation is enhanced by the adsorption, the activation is not significant with the doping of chalcogen atoms.

Original language	English
Pages (from-to)	228-237
Number of pages	10
Journal	Surfaces
Volume	5
Issue number	2
Early online date	1 Apr 2022
DOIs	https://doi.org/10.3390/surfaces5020016
Publication status	E-pub ahead of print - 1 Apr 2022

Bibliographical note

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keywords

graphene
density functional theory
molecular dinitrogen
adsorption

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10.3390/surfaces5020016Licence: CC BY

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AB - In this work, we studied dispersion correction, adsorption and substitution of chalcogen dopants (O, S, Se and Te) on the surface of graphene using density functional theory. The results reveal that a single oxygen atom is more preferred for adsorption onto the graphene surface than the other dopants, with an adsorption energy of −0.84 eV. The preference of this dopant is evidenced by a greater charge transfer of 0.34 electrons from the graphene surface to the oxygen. The substitutional doping of oxygen is energetically more favourable than the doping of other atoms. While nitrogen activation is enhanced by the adsorption, the activation is not significant with the doping of chalcogen atoms.

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Chalcogen Atom-Doped Graphene and Its Performance in N2 Activation

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