中国物理B ›› 2010, Vol. 19 ›› Issue (3): 36103-036103.doi: 10.1088/1674-1056/19/3/036103

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Hydrogen storage in BC3 composite single-walled nanotube:a combined density functional theory and Monte Carlo investigation

刘秀英1, 孙卫国2, 王朝阳3, 唐永建3, 吴卫东3   

  1. (1)College of Science, Henan University of Technology, Zhengzhou 450001,China;Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China; (2)Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China; (3)Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
  • 收稿日期:2008-10-09 修回日期:2009-06-22 出版日期:2010-03-15 发布日期:2010-03-15
  • 基金资助:
    Project supported by Henan University of Technology Foundation (Grant No.~2009BS025) and China Academy of Engineering Physics Foundation (Grant No.~2007B08008).

Hydrogen storage in BC3 composite single-walled nanotube:a combined density functional theory and Monte Carlo investigation

Liu Xiu-Ying(刘秀英)a)b), Wang Chao-Yang(王朝阳)b), Tang Yong-Jian(唐永建)b), Sun Wei-Guo(孙卫国)c), and Wu Wei-Dong (吴卫东)b)   

  1. a College of Science, Henan University of Technology, Zhengzhou 450001, China; b Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China; c Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
  • Received:2008-10-09 Revised:2009-06-22 Online:2010-03-15 Published:2010-03-15
  • Supported by:
    Project supported by Henan University of Technology Foundation (Grant No.~2009BS025) and China Academy of Engineering Physics Foundation (Grant No.~2007B08008).

摘要: This paper applies a density functional theory (DFT) and grand canonical Monte Carlo simulations (GCMC) to investigate the physisorptions of molecular hydrogen in single-walled BC3 nanotubes and carbon nanotubes. The DFT calculations may provide useful information about the nature of hydrogen adsorption and physisorption energies in selected adsorption sites of these two nanotubes. Furthermore, the GCMC simulations can reproduce their storage capacity by calculating the weight percentage of the adsorbed molecular hydrogen under different conditions. The present results have shown that with both computational methods, the hydrogen storage capacity of BC3 nanotubes is superior to that of carbon nanotubes. The reasons causing different behaviour of hydrogen storage in these two nanotubes are explained by using their contour plots of electron density and charge-density difference.

Abstract: This paper applies a density functional theory (DFT) and grand canonical Monte Carlo simulations (GCMC) to investigate the physisorptions of molecular hydrogen in single-walled BC3 nanotubes and carbon nanotubes. The DFT calculations may provide useful information about the nature of hydrogen adsorption and physisorption energies in selected adsorption sites of these two nanotubes. Furthermore, the GCMC simulations can reproduce their storage capacity by calculating the weight percentage of the adsorbed molecular hydrogen under different conditions. The present results have shown that with both computational methods, the hydrogen storage capacity of BC3 nanotubes is superior to that of carbon nanotubes. The reasons causing different behaviour of hydrogen storage in these two nanotubes are explained by using their contour plots of electron density and charge-density difference.

Key words: BC3 composite nanotube, hydrogen storage, density functional theory (DFT), grand canonical Monte Carlo method (GCMC)

中图分类号:  (Direct energy conversion and storage)

  • 84.60.-h
61.46.Fg (Nanotubes) 68.43.Mn (Adsorption kinetics ?) 85.35.Kt (Nanotube devices)