First‐principles calculations of oxygen adsorption on the Ti3Al (0001) surface |
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| Authors: | L J Wei J X Guo X H Dai L Guan Y L Wang B T Liu |
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| Institution: | 1. Hebei Key Lab of Optic‐Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding, Hebei, China;2. College of Science and Technology, North China Electric Power University, Baoding, Hebei, China |
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| Abstract: | Adsorption energies and density of states for O atoms adsorption on the Ti3Al (0001) surface have been calculated using first‐principles calculations based on density functional theory. It is found that the order of O atom adsorption on the Ti3Al (0001) surface is associated with the adsorption energy as well as the distance of O atoms because of the interaction. The adsorption energy mainly depends on the bond number and bond strength between O and Ti atoms, and the adsorption site with rich‐Ti surface (HI and HCPAl) is first priority. The adsorption energy decreases with the increase of the oxygen coverage because of the characteristics of the valence d‐orbitals of transition metals surface. Furthermore, the density of states indicates that the hybridization peak of O and Ti atoms is mainly from the contribution of Ti 3d‐ and O 2p‐orbitals, and the hybridization peak of O and Al atoms from the contribution of Al 2p‐ and O 2p‐orbitals. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | adsorption first‐principles Ti3Al (0001) surface oxygen density of states |
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