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    Synthesis of NaAlH<inf>4</inf>/Al composites and their applications in hydrogen storage

    Access Status
    Fulltext not available
    Authors
    Ianni, E.
    Sofianos, M.
    Rowles, Matthew
    Sheppard, Drew
    Humphries, Terry
    Buckley, Craig
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Ianni, E. and Sofianos, M. and Rowles, M. and Sheppard, D. and Humphries, T. and Buckley, C. 2018. Synthesis of NaAlH<inf>4</inf>/Al composites and their applications in hydrogen storage. International Journal of Hydrogen Energy. 43 (36): pp. 17309-17317.
    Source Title
    International Journal of Hydrogen Energy
    DOI
    10.1016/j.ijhydene.2018.07.072
    ISSN
    0360-3199
    School
    John de Laeter Centre
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP150101708
    http://purl.org/au-research/grants/arc/LE140100075
    URI
    http://hdl.handle.net/20.500.11937/73009
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Hydrogen Energy Publications LLC In solid-state hydrogen storage in light metal hydrides, nanoconfinement and the use of catalysts represent promising solutions to overcoming limitations such as poor reversibility and slow kinetics. In this work, the morphology and hydrogen desorption kinetics of NaAlH4 melt-infiltrated into a previously developed Ti-based doped porous Al scaffold is analysed. Small-angle X-ray scattering and scanning electron microscopy analysis of low NaAlH4 loading in the porous Al scaffold has revealed that mesopores and small macropores are filled first, leaving the larger macropores/voids empty. Temperature-programmed desorption experiments have shown that NaAlH4-infiltrated porous Al scaffolds show a higher relative H2 release, with respect to NaAlH4 + TiCl3, in the temperature range 148–220 °C, with the temperature of H2 desorption trending to bulk NaAlH4 with increasing scaffold loading. The Ti-based catalytic effect is reproduced when the dopant is present in the scaffold. Further work is required to increase the mesoporous volume in order to enhance the nanoconfinement effect.

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