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Published December 7, 1998 | Published
Journal Article Open

Hydrogen desorption and adsorption measurements on graphite nanofibers


Graphite nanofibers were synthesized and their hydrogen desorption and adsorption properties are reported for 77 and 300 K. Catalysts were made by several different methods including chemical routes, mechanical alloying, and gas condensation. The nanofibers were grown by passing ethylene and H2 gases over the catalysts at 600 °C. Hydrogen desorption and adsorption were measured using a volumetric analysis Sieverts' apparatus, and the graphite nanofibers were characterized by transmission electron microscopy and Brunauer–Emmett–Teller surface area analysis. The absolute level of hydrogen desorption measured from these materials was typically less than the 0.01 H/C atom, comparable to other forms of carbon.

Additional Information

© 1998 American Institute of Physics. (Received 31 August 1998; accepted 6 October 1998) This work was supported by DOE through Basic Energy Sciences Grant No. DE-FG03-94ER14493. Two of the authors (B.V.R.) and (R.C.B.) like to acknowledge partial support of this work through a 1997 JPL DRDF Grant. The Jet Propulsion Laboratory is operated by the California Institute of Technology under contract with the U.S. National Aeronautics and Space Administration. We would also like to thank G. Gavalas and R. Lai for help with the BET measurements.

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