• 文献标题:   Hydrogen storage properties of Li-, Sc-, Ti-decorated psi-graphene: A DFT study
  • 文献类型:   Article
  • 作  者:   NIE MJ, GE Y, LIU ZY, MIAO ZC, ZOU JY, DING JY, YANG ZH, SU HZ, YAN G, WANG YH, BI L
  • 作者关键词:   hydrogen storage, dft, psigraphene, bader charge analysi, boron doping
  • 出版物名称:   INTERNATIONAL JOURNAL OF MODERN PHYSICS B
  • ISSN:   0217-9792 EI 1793-6578
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1142/S0217979222501442
  • 出版年:   2022

▎ 摘  要

In this paper, the hydrogen storage performance of Sc (Ti, Li)-modified psi-graphene (psi-g) is investigated by density functional theory (DFT). Sc and Ti can be stably adsorbed on psi-g with the binding energies of 4.78 eV and 4.83 eV, respectively. Li atoms can also be stably absorbed on B-doped psi-g with the binding energy of 2.51 eV. In addition, Sc and Ti atoms attached on psi-g can adsorb up to ten and eight hydrogen molecules, and the hydrogen gravimetric storage capacity reaches 7.93 wt.% and 6.20 wt.%, respectively. Li atoms attached on B-doped psi-g can adsorb up to eight hydrogen molecules with the hydrogen gravimetric storage capacity 9.32 wt.%, all meeting DOE standards. On the whole, Bader charge analysis shows that the charge is transferred from C atoms to H atoms, which is more conducive to hydrogen adsorption. All the researches prove that the Sc, Ti-decorated psi-g and Li-decorated B-doped psi-g are potential hydrogen storage materials.