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- W2006403211 abstract "Graphene doped by nitrogen (N) and/or boron (B) is used to represent the surface models of coal with the structural heterogeneity. Through the density functional theory (DFT) calculations, the interactions between coalbed methane (CBM) and coal surfaces have been investigated. Several adsorption sites and orientations of methane (CH4) on graphenes were systematically considered. Our calculations predicted adsorption energies of CH4 on graphenes of up to −0.179 eV, with the strongest binding mode in which three hydrogen atoms of CH4 direct to graphene surface, observed for N-doped graphene, compared to the perfect (−0.154 eV), B-doped (−0.150 eV), and NB-doped graphenes (−0.170 eV). Doping N in graphene increases the adsorption energies of CH4, but slightly reduced binding is found when graphene is doped by B. Our results indicate that all of graphenes act as the role of a weak electron acceptor with respect to CH4. The interactions between CH4 and graphenes are the physical adsorption and slightly depend upon the adsorption sites on graphenes and the orientations of methane as well as the electronegativity of dopant atoms in graphene." @default.
- W2006403211 created "2016-06-24" @default.
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- W2006403211 date "2013-11-01" @default.
- W2006403211 modified "2023-09-28" @default.
- W2006403211 title "Adsorption of CH4 on nitrogen- and boron-containing carbon models of coal predicted by density-functional theory" @default.
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- W2006403211 doi "https://doi.org/10.1016/j.apsusc.2013.08.035" @default.
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