Journal
JOURNAL OF CATALYSIS
Volume 206, Issue 1, Pages 165-168Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/jcat.2001.3472
Keywords
hydrogen storage; carbon nanotubes; mutt-wall; metal oxides
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Hydrogen storage on multiwalled nanotubes (MWNTs) was dependent on the degree of catalyst removal. At atmospheric pressure, removal of the catalyst decreased the uptake from 0.6% to below detection limits. Hydrogen uptake of the metal oxide catalyst ranged from 0.25 to 0.98%, depending on surface area. Normalization by metal content and temperature-programmed desorption studies suggest hydrogen dissociation and subsequent spillover to the MWNT. Metal-support interactions were key to the spillover; dry mixing of the MWNT and catalyst did not enhance storage, whereas in situ production increased storage by 40%. The moderate temperature range of this material suggests a novel material for hydrogen storage applications. (C) 2002 Elsevier Science (USA).
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