title: Hydrogenation of single-walled carbon nanotubes.
abstract: Towards the development of a useful mechanism for hydrogen storage, we have studied the hydrogenation of single-walled carbon nanotubes with atomic hydrogen using core-level photoelectron spectroscopy and x-ray absorption spectroscopy. We find that atomic hydrogen creates C-H bonds with the carbon atoms in the nanotube walls, and such C-H bonds can be completely broken by heating to 600 degrees C. We demonstrate approximately 65 +/- 15 at % hydrogenation of carbon atoms in the single-walled carbon nanotubes, which is equivalent to 5.1 +/- 1.2 wt % hydrogen capacity. We also show that the hydrogenation is a reversible process.
authors.affiliation: Stanford Synchrotron Radiation Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: A
authors.initials: A
authors.lastname: Nikitin
authors.forename: H
authors.initials: H
authors.lastname: Ogasawara
authors.forename: D
authors.initials: D
authors.lastname: Mann
authors.forename: R
authors.initials: R
authors.lastname: Denecke
authors.forename: Z
authors.initials: Z
authors.lastname: Zhang
authors.forename: H
authors.initials: H
authors.lastname: Dai
authors.forename: K
authors.initials: K
authors.lastname: Cho
authors.forename: A
authors.initials: A
authors.lastname: Nilsson