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• W4200248489 abstract "• New single atom catalysts (SAC) based on M-doped CNT are proposed for TCDF dehydrogenation. • The first step of dissociation is studied from both thermodynamics and kinetics points of view. • Proposed M-doped CNT have less barrier energy for C H, C O, and C Cl bond dissociations compared to pristine CNT. • In addition to doped CNTs, effects of defect and co-adsorption were investigated. Previous literature data showed that pristine aromatic allotropes of carbon such as graphene and carbon nanotubes (CNT) don’t show good interaction with carbon-based pollutants. On the other hand, defects or metal/non-metal doping in these inexpensive available catalysts could increase their strength for the adsorption and dissociation of different pollutants. In this work, by using periodic DFT calculations, adsorption of Tetrachlorodibenzofuran (TCDF) on pristine, co-adsorbed, defected, and M-doped carbon nanotubes (M = Al, Fe, Mn) is studied, and possible pathways for its first step dissociation is investigated. Data show that all three models of dissociations of TCDF need very high barrier energies on the surface of pristine CNT. Its minimum barrier energy is 3.31 eV which belongs to C Cl bond cleavage. On the other hand, co-adsorbed, defected, and M-doped CNTs need less barrier energies. Minimum barrier energy belongs to C H bond dissociation on oxygen co-adsorbed CNT with 0.92 eV which is almost equal to the temperature of 355 K. Co-adsorbed CNT catalyst can also activate C Cl chemical bond by 0.93 eV. Some catalysts such as Al-doped CNT is selective for C O bond cleavage, but some other catalysts, such as co-adsorbed CNT for C H and C Cl, have similar barrier energy for two models of dissociations. With considering kinetics point of view (by barrier energies) and thermodynamics point of view (by reaction energy), data show that co-adsorbed, defected, and Al-doped CNTs are good catalysts for the first step dissociation of TCDF." @default.
• W4200248489 created "2021-12-31" @default.
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• W4200248489 date "2022-03-01" @default.
• W4200248489 modified "2023-09-24" @default.
• W4200248489 title "A mechanistic periodic DFT study on the dissociation of tetrachlorodibenzofuran (TCDF) by M-doped carbon nanotube catalysts (M = Al, Fe, Mn)" @default.
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• W4200248489 doi "https://doi.org/10.1016/j.apsusc.2021.152217" @default.
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