title: Synthesis of small metallic Mg-based nanoparticles confined in porous carbon materials for hydrogen sorption.
abstract: MgH2, Mg-Ni-H and Mg-Fe-H nanoparticles inserted into ordered mesoporous carbon templates have been synthesized by decomposition of organometallic precursors under hydrogen atmosphere and mild temperature conditions. The hydrogen desorption properties of the MgH2 nanoparticles are studied by thermo-desorption spectroscopy. The particle size distribution of MgH2, as determined by TEM, is crucial for understanding the desorption properties. The desorption kinetics are significantly improved by downsizing the particle size below 10 nm. Isothermal absorption/desorption cycling of the MgH2 nanoparticles shows a stable capacity over 13 cycles. The absorption kinetics are unchanged though the desorption kinetics are slower on cycling.
authors.affiliation: Institut de Chimie et des Matériaux de Paris-Est, UMR-CNRS 7182, 2-8, Rue Henri Dunant, 94320 Thiais, France.
authors.forename: Claudia
authors.initials: C
authors.lastname: Zlotea
authors.forename: Clotaire
authors.initials: C
authors.lastname: Chevalier-César
authors.forename: Eric
authors.initials: E
authors.lastname: Léonel
authors.forename: Eric
authors.initials: E
authors.lastname: Leroy
authors.forename: Fermin
authors.initials: F
authors.lastname: Cuevas
authors.forename: Philippe
authors.initials: P
authors.lastname: Dibandjo
authors.forename: Cathie
authors.initials: C
authors.lastname: Vix-Guterl
authors.forename: Thierry
authors.initials: T
authors.lastname: Martens
authors.forename: Michel
authors.initials: M
authors.lastname: Latroche