Optimization of metal dispersion in doped graphitic materials for hydrogen storage

  • Kim G
  • Jhi S
  • Park N
 et al. 
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The noncovalent hydrogen binding on transition-metal atoms dispersed on carbon clusters and graphene is studied with the use of the pseudopotential density-functional method. It is found that the presence of accep- torlike states in the absorbents is essential for enhancing the metal adsorption strength and for increasing the number of hydrogen molecules attached to the metal atoms. Particular configurations of boron substitutional doping are found to be very efficient for providing such states and thus enhancing storage capacity. Optimal doping conditions are suggested based on our calculations for the binding energy and ratio between metal and hydrogen molecules.

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  • Gyubong Kim

  • Seung Hoon Jhi

  • Noejung Park

  • Steven G. Louie

  • Marvin L. Cohen

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