Theoretical investigation on the alkali-metal doped BN fullerene as a material for hydrogen storage

Natarajan Sathiyamoorthy Venkataramanan, Rodion Vladimirovich Belosludov, Ryunosuke Note, Ryoji Sahara, Hiroshi Mizuseki, Yoshiyuki Kawazoe

研究成果: Article査読

33 被引用数 (Scopus)

抄録

First-principles calculations have been used to investigate hydrogen adsorption on alkali atom doped B36N36 clusters. The alkali atom adsorption takes place near the six tetragonal bridge sites available on the cage, thereby avoiding the notorious clustering problem. Adsorption of alkali atoms involves a charge transfer process, creating positively charged alkali atoms and this polarizes the H2 molecules thereby, increasing their binding energy. Li atom has been found to adsorb up to three hydrogen molecules with an average binding energy of 0.189 eV. The fully doped Li6B36N36 cluster has been found to hold up to 18 hydrogen molecules with the average binding energy of 0.146 eV. This corresponds to a gravimetric density of hydrogen storage of 3.7 wt.%. Chemisorption on the Li6B36N36 has been found to be an exothermic reaction, in which 60 hydrogen atoms chemisorbed with an average chemisorption energy of -2.13 eV. Thus, the maximum hydrogen storage capacity of Li doped BN fullerene is 8.9 wt.% in which 60 hydrogen atoms were chemisorbed and 12 hydrogen molecules were adsorbed in molecular form.

本文言語English
ページ(範囲)54-59
ページ数6
ジャーナルChemical Physics
377
1-3
DOI
出版ステータスPublished - 2010 11 25

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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