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• W2186994045 abstract "Abstract The adsorption and dissociation mechanisms of SiH x ( x  = 1–4) species on W(1 1 1) surface have been investigated by using the periodic density functional theory with the projector-augmented wave approach. The adsorption of all the species on four surface sites: top (T), bridge (B), shallow (S), and deep (D) sites have been analyzed. For SiH 4 on a top site, T-SiH 4(a) , it is more stable with an adsorption energy of 2.6 kcal/mol. For SiH 3 , the 3-fold shallow site is most favorable with adsorption energy of 46.0 kcal/mol. For SiH 2 , its adsorption on a bridge site is most stable with 73.0 kcal/mol binding energy, whereas for SiH and Si the most stable adsorption configurations are on 3-fold deep sites with very high adsorption energies, 111.8 and 134.7 kcal/mol, respectively. The potential energy surfaces for the dissociative adsorption of all SiH x species on the W(1 1 1) surface have been constructed using the CINEB method. The barriers for H-atom migration from SiH x (a) to its neighboring W atoms, preferentially on B-sites, were predicted to be 0.4, 1.0, 4.5 and, 8.0 kcal/mol, respectively, for x  = 4, 3, 2, and 1, respectively. The adsorption energy of the H atom on a bridge site on the clean W(1 1 1) surface was predicted to be 65.9 kcal/mol, which was found to be slightly affected by the co-adsorption of SiH x −1 within ± 1 kcal/mol." @default.
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• W2186994045 date "2016-01-01" @default.
• W2186994045 modified "2023-09-27" @default.
• W2186994045 title "A computational study on the energetics and mechanisms for the dissociative adsorption of SiH (x= 1–4) on W(1 1 1) surface" @default.
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• W2186994045 doi "https://doi.org/10.1016/j.apsusc.2015.11.109" @default.
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