Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 12, Pages 8530-8540Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp00344g
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Funding
- Swedish Research Links initiative of the Swedish Research Council [348-2012-6196]
- Swedish Research Council [2014-5993]
- Serbian Ministry of Educations, Science and Technological Development [III45014]
- NATO Project [EAP.SFPP 984925]
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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 O-2 molecule as a probe we show that a proper modelling of doped graphene materials has to take into account the presence of oxygen functional groups.
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