title: Nanosize-induced hydrogen storage and capacity control in a non-hydride-forming element: rhodium.
abstract: We report the first example of nanosize-induced hydrogen storage in a metal that does not absorb hydrogen in its bulk form. Rhodium particles with diameters of <10 nm were found to exhibit hydrogen-storage capability, while bulk Rh does not absorb hydrogen. Hydrogen storage was confirmed by in situ powder X-ray diffraction, solid-state (2)H NMR, and hydrogen pressure-composition isotherm measurements. The hydrogen absorption capacity could be tuned by controlling the particle size.
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan. hkobayashi@icems.kyoto-u.ac.jp
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Kobayashi
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Morita
authors.forename: Miho
authors.initials: M
authors.lastname: Yamauchi
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Ikeda
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitagawa
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Kubota
authors.forename: Kenichi
authors.initials: K
authors.lastname: Kato
authors.forename: Masaki
authors.initials: M
authors.lastname: Takata