Article Dans Une Revue Physical Review Letters Année : 2007

Nature of the bound states of molecular hydrogen in carbon nanohorns

Résumé

The effects of confining molecular hydrogen within carbon nanohorns are studied via high-resolution quasielastic and inelastic neutron spectroscopies. Both sets of data are remarkably different from those obtained in bulk samples in the liquid and crystalline states. At temperatures where bulk hydrogen is liquid, the spectra of the confined sample show an elastic component indicating a significant proportion of immobile molecules as well as distinctly narrower quasielastic line widths and a strong distortion of the line shape of the para - ortho rotational transition. The results show that hydrogen interacts far more strongly with such carbonous structures than it does to carbon nanotubes, suggesting that nanohorns and related nanostructures may offer significantly better prospects as lightweight media for hydrogen storage applications.

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Est une version de hal-00193020 Article Felix Fernandez-Alonso, F. Javier Bermejo, Raouf O. Loutfy, Vincent Leon, Marie-Louise Saboungi. Stockage d'hydrogène : comment l'hydrogène se lie aux nanocornets de carbone. Les Techniques de l'Ingenieur, 2008, Nanotechnologies, pp.NM5150. ⟨hal-00193020⟩

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Cite tel-00107124 Thèse de doctorat Vincent Leon. Etude des effets de confinement dans la silice mésoporeuse et dans certaines nanostructures carbonées.. Matériaux. Université d'Orléans, 2006. Français. ⟨NNT : ⟩. ⟨tel-00107124v2⟩

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hal-00151470 , version 1 (04-06-2007)

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Felix Fernandez-Alonso, F. Javier Bermejo, Carlos Cabrillo, Raouf O. Loutfy, Vincent Leon, et al.. Nature of the bound states of molecular hydrogen in carbon nanohorns. Physical Review Letters, 2007, 98 (21), pp.215503. ⟨10.1103/PhysRevLett.98.215503⟩. ⟨hal-00151470⟩
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