title: Chemical storage of hydrogen in few-layer graphene.
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 °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.
authors.affiliation: Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore-560 064, India.
authors.forename: K S
authors.initials: KS
authors.lastname: Subrahmanyam
authors.forename: Prashant
authors.initials: P
authors.lastname: Kumar
authors.forename: Urmimala
authors.initials: U
authors.lastname: Maitra
authors.forename: A
authors.initials: A
authors.lastname: Govindaraj
authors.forename: K P S S
authors.initials: KP
authors.lastname: Hembram
authors.forename: Umesh V
authors.initials: UV
authors.lastname: Waghmare
authors.forename: C N R
authors.initials: CN
authors.lastname: Rao
mesh_terms: D002849:Chromatography, Gas; D006108:Graphite / Q000737:chemistry*; D006358:Hot Temperature; D006859:Hydrogen / Q000737:chemistry*; D006865:Hydrogenation; D007834:Lasers; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D013053:Spectrophotometry; D014466:Ultraviolet Rays
chemical_list: D006108:Graphite; D006859:Hydrogen