Substitution effects on the hydrogen storage behavior of AB2 alloys by first principles
Substitution effects on the hydrogen storage behavior of AB2 alloys by first principles
Fen LI1,2,3, Ji-jun ZHAO1,2(), Li-xian SUN3()
1. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China; 2. College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, China; 3. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Dalian 116023, China
The hydrogen storage behavior of the TiCr2 and ZrCr2 alloys substituted with the third components (Zr, V, Fe, Ni) have been studied using first-principles calculations. The change of the hydrogen absorption energies caused by metal doping is arising from the charge transfer among the doped alloys interior. Zr and V atoms devoted abundant electrons, leading to a great enhancement of the H absorption energy, while Fe and Ni atoms always accepted electrons, yielding a remarkable decrease of the H absorption energy. The hydrogen diffusion energy barrier is closely correlated with the geometry effect rather than the electronic structure.
Corresponding Author(s):
ZHAO Ji-jun,Email:zhaojj@dlut.edu.cn; SUN Li-xian,Email:lxsun@dicp.ac.cn
引用本文:
. Substitution effects on the hydrogen storage behavior of AB2 alloys by first principles[J]. Frontiers of Physics, 2011, 6(2): 214-219.
Fen LI, Ji-jun ZHAO, Li-xian SUN. Substitution effects on the hydrogen storage behavior of AB2 alloys by first principles. Front. Phys. , 2011, 6(2): 214-219.
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