Hydrogen Storage in High Surface Area Carbon Nanotubes Produced by Catalytic Chemical Vapor Deposition

Revathi Bacsa (1) , Christophe Laurent (1) , Ryuta Morishima (2) , Hiroshi Suzuki (2) , Mikako Le Lay (3)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 Toyota Motor Corporation (JAPAN)
3 Toyota Motor Europe (BELGIUM)

Carbon nanotubes, mostly single- and double-walled, are prepared by a catalytic chemical vapor deposition method using H2-CH4 atmospheres with different CH4 contents. The maximum hydrogen storage at room temperatures and 10 MPa is 0.5 wt %. Contrary to expectations, purification of the carbon nanotube specimens by oxidative acid treatments or by heating in inert gas decreases the hydrogen storage. Decreasing the residual catalyst content does not necessarily lead to an increase in ASH. Moreover, increasing the specific surface area does not necessarily increase the hydrogen storage capacity. There seems to be a correlation between the pore volume at low pore diameters (<3 nm) and the hydrogen storage capacity. Contribution from nanoscale disordered carbon to the hydrogen storage cannot be ruled out.

Mots clés: Hydrogen Storage; Carbon Nanotubes

Domaines: Matériaux; Matériaux

Revathi Bacsa, Christophe Laurent, Ryuta Morishima, Hiroshi Suzuki, Mikako Le Lay. Hydrogen Storage in High Surface Area Carbon Nanotubes Produced by Catalytic Chemical Vapor Deposition. Journal of Physical Chemistry B, 2004, vol. 108, pp. 12718-12723. ⟨10.1021/jp0312621⟩. ⟨hal-00920911⟩