RUAN Wen, SONG Honglian, WU Donglan, et al. Study of the structures and hydrogen storage properties of Na atoms decorated tetrahedron Si4 cluster[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2020,59(3):128-133.
RUAN Wen, SONG Honglian, WU Donglan, et al. Study of the structures and hydrogen storage properties of Na atoms decorated tetrahedron Si4 cluster[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2020,59(3):128-133. DOI: 10.13471/j.cnki.acta.snus.2020.03.014.
Based on the alkali metal sodium atoms decorated tetrahedron
Si
4
small cluster
the geometric structures
electronic properties and hydrogen storage properties of tetrahedral
Na
4
Si
4
cluster were studied by using the Minnesota density functional theory (DFT
M06) method. The results show that the tetrahedron
Si
4
can be decorated by alkali metal Na atoms on the four surfaces stably and Na atoms do not occur clustering. Hydrogen molecules can be adsorbed around the Na atoms
in which every Na atom can adsorb six hydrogen molecules efficiently,corresponding to a maximum mass fraction of 19.15% with an average adsorption energies of
3.926~9.927 kJ·mol
-1
per H
2
molecule.The results demonstrate that the tetrahedral
Na
4
Si
4
cluster has the potential to become an effective hydrogen storage medium under the room temperature and atmospheric pressure conditions.
关键词
密度泛函理论(DFT)四面体Na4Si4团簇吸附能储氢
Keywords
density functional theory (DFT)tetrahedralNa4Si4clusteradsorption energyhydrogen storage