Faculté des sciences

Ti-catalyzed Mg(AlH₄)₂: A reversible hydrogen storage material

Gremaud, Robin ; Borgschulte, A. ; Lohstroh, W. ; Schreuders, H. ; Züttel, Andreas ; Dam, B. ; Griessen, R.

In: Journal of Alloys and Compounds, 2005, vol. 404-406, p. 775-778

Mg–Al thin films with a compositional gradient are co-sputtered from off-centered magnetron sources and capped with a thin Pd layer. We study their hydride formation by monitoring their optical transmission during hydrogenation under defined pressure and temperature conditions. We find that Mg(AlH₄)₂ is already formed from the elements at p(H₂)=1 bar and T=100 ° C. A thin... Plus

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    Summary
    Mg–Al thin films with a compositional gradient are co-sputtered from off-centered magnetron sources and capped with a thin Pd layer. We study their hydride formation by monitoring their optical transmission during hydrogenation under defined pressure and temperature conditions. We find that Mg(AlH₄)₂ is already formed from the elements at p(H₂)=1 bar and T=100 ° C. A thin layer of Ti acts as a catalyst. Doping of Mg–Al with Ti has a negative influence on hydrogen absorption.