Hydrogen storage of dense-aligned carbon nanotubes

It has been considered so far that the inner cavities of carbon nanotubes a re the desired place for the storage of hydrogen molecules. Here we show th at the inter-nanotube space between densely aligned carbon nanotubes, produ ced by catalytic pyrolysis of ferrocene, could also contribute to the effec tive uptake of molecular hydrogen. This provides a new way to improve the p roperties of carbon nanotubes in storing hydrogen or other elemental molecu les. (C) 2001 Elsevier Science B.V. All rights reserved.