The electronic properties of free-standing and Cu-supported pristine and boron-doped, nitrogen-doped, and codoped graphene have been studied by means of density functional theory (DFT) with the vdW-DF2C09x functional. The effects of substitutional chemical doping, metal support, lattice parameter strain, and their eventual interplay have been investigated. We find that only boron-doped graphene strongly interacts with the copper substrate, due to chemical bonds between the boron atom and the underlying metal. The binding energy and charge transfer from Cu are also highly enhanced compared to both pristine and nitrogen-doped supported graphene. The BN codoped system behaves similarly to pristine graphene with a weakly physisorbed state and a small charge transfer from Cu. However, the presence of the nonmetal dopants makes the codoped sheet extremely tunable for redox purposes, with the boron site acting as an electron acceptor and the nitrogen site as an electron donor.

Ferrighi, L., Trioni, M., DI VALENTIN, C. (2015). Boron-doped, nitrogen-doped, and codoped graphene on Cu(111): A DFT + vdW study. JOURNAL OF PHYSICAL CHEMISTRY. C, 119(11), 6056-6064 [10.1021/jp512522m].

Boron-doped, nitrogen-doped, and codoped graphene on Cu(111): A DFT + vdW study

FERRIGHI, LARA
;
TRIONI, MARIO ITALO
Secondo
;
DI VALENTIN, CRISTIANA
Ultimo
2015

Abstract

The electronic properties of free-standing and Cu-supported pristine and boron-doped, nitrogen-doped, and codoped graphene have been studied by means of density functional theory (DFT) with the vdW-DF2C09x functional. The effects of substitutional chemical doping, metal support, lattice parameter strain, and their eventual interplay have been investigated. We find that only boron-doped graphene strongly interacts with the copper substrate, due to chemical bonds between the boron atom and the underlying metal. The binding energy and charge transfer from Cu are also highly enhanced compared to both pristine and nitrogen-doped supported graphene. The BN codoped system behaves similarly to pristine graphene with a weakly physisorbed state and a small charge transfer from Cu. However, the presence of the nonmetal dopants makes the codoped sheet extremely tunable for redox purposes, with the boron site acting as an electron acceptor and the nitrogen site as an electron donor.
Articolo in rivista - Articolo scientifico
Physical and Theoretical Chemistry; Electronic, Optical and Magnetic Materials; Surfaces, Coatings and Films; Energy (all)
English
2015
119
11
6056
6064
none
Ferrighi, L., Trioni, M., DI VALENTIN, C. (2015). Boron-doped, nitrogen-doped, and codoped graphene on Cu(111): A DFT + vdW study. JOURNAL OF PHYSICAL CHEMISTRY. C, 119(11), 6056-6064 [10.1021/jp512522m].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/110754
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