Abstract
The possibility of hydrogen storage in gallium phosphate nanotubes (GaPNTs) as a high-capacity hydrogen storage media is studied by employing ab-initio density functional theory (DFT) calculations with a van der Waals (VdW) correction. The binding energy, the distance of the adsorbed hydrogen molecules and the charge transfer were particularly calculated. The obtained results indicate that hydrogenation of the GaPNTs is sensitive to the curvatures and chiralities of the nanotubes. It is found that the binding energy of hydrogen physisorption on GaP nanotubes is higher that on carbon nanotubes. These results are useful in the search for a proper media for hydrogen storage at ambient conditions.
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