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Irreversible hydrogenation of solid C60 with and without catalytic metals

Published online by Cambridge University Press:  31 January 2011

Eric L. Brosha ,
John Davey ,
Fernando H. Garzon  and
Shimshon Gottesfeld
Eric L. Brosha
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
John Davey
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Fernando H. Garzon
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Shimshon Gottesfeld
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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Abstract

The dehydrogenation of C60 · H18.7 was studied using thermogravimetric and powder x-ray diffraction analysis. C60 · H18.7 was found to be stable up to 430 °C in Ar at which point the release of hydrogen initiated the collapse of a fraction of fullerene molecules. X-ray diffraction analysis performed on C60 · H18.7 samples dehydrogenated at 454, 475, and 600 °C displayed an increasing volume fraction of amorphous material. The decomposition product comprises randomly oriented, single-layer graphite sheets. Evolved gas analysis using gas chromatograph (GC) mass spectroscopy confirmed the presence of both H2 and methane upon dehydrogenation. Attempts to improve reversibility or reduce hydrogenation/ dehydrogenation temperatures by addition of Ru and Pt catalysts were unsuccessful.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 5 , May 1999 , pp. 2138 - 2146
Copyright
Copyright © Materials Research Society 1999

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