title: A DFT study of the interplay between dopants and oxygen functional groups over the graphene basal plane - implications in energy-related applications.
abstract: Understanding the ways graphene can be functionalized is of great importance for many contemporary technologies. Using density functional theory calculations we investigate how vacancy formation and substitutional doping by B, N, P and S affect the oxidizability and reactivity of the graphene basal plane. We find that the presence of these defects enhances the reactivity of graphene. In particular, these sites act as strong attractors for OH groups, suggesting that the oxidation of graphene could start at these sites or that these sites are the most difficult to reduce. Scaling between the OH and H adsorption energies is found on both reduced and oxidized doped graphene surfaces. Using the O2molecule as a probe we show that a proper modelling of doped graphene materials has to take into account the presence of oxygen functional groups.
authors.affiliation: University of Belgrade - Faculty of Physical Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia. igor@ffh.bg.ac.rs.
authors.forename: Ana S
authors.initials: AS
authors.lastname: Dobrota
authors.affiliation: University of Belgrade - Faculty of Physical Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia. igor@ffh.bg.ac.rs.
authors.forename: Igor A
authors.identifier: http://orcid.org/0000-0002-1000-9784
authors.initials: IA
authors.lastname: Pašti
authors.affiliation: University of Belgrade - Faculty of Physical Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia. igor@ffh.bg.ac.rs and Serbian Academy of Sciences and Arts, Knez Mihajlova 35, 11000 Belgrade, Serbia.
authors.forename: Slavko V
authors.initials: SV
authors.lastname: Mentus
authors.affiliation: Department of Materials Science and Engineering, KTH - Royal Institute of Technology, Brinellvägen 23, 100 44 Stockholm, Sweden and Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden.
authors.forename: Natalia V
authors.initials: NV
authors.lastname: Skorodumova