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Title: Chemical storage of hydrogen in few-layer graphene
Authors: Subrahmanyam, K S
Kumar, Prashant
Maitra, Urmimala
Govindaraj, A
Hembram, K P S S
Waghmare, Umesh V
Rao, C N R
Keywords: hydrogen storage
reversible hydrogenation
Generalized Gradient Approximation
Reversible Hydrogenation
Carbon Nanotubes
Issue Date: 15-Feb-2011
Publisher: National Academy of Sciences
Citation: Proceedings Of The National Academy Of Sciences -The United States Of America 108(7), 2674-2677 (2011)
Abstract: Birch reduction of few-layer graphene samples gives rise to hydrogenated samples containing up to 5 wt % of hydrogen. Spectroscopic studies reveal the presence of sp(3) C-H bonds in the hydrogenated graphenes. They, however, decompose readily on heating to 500 degrees C or on irradiation with UV or laser radiation releasing all the hydrogen, thereby demonstrating the possible use of few-layer graphene for chemical storage of hydrogen. First-principles calculations throw light on the mechanism of dehydrogenation that appears to involve a significant reconstruction and relaxation of the lattice.
Description: Restricted Access
Other Identifiers: 0027-8424
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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