Deuterium absorption in Mg70Al30 thin films with bilayer catalysts: a comparative neutron reflectometry study

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DOIResolve DOI: http://doi.org/10.1016/j.jallcom.2011.02.111
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TypeArticle
Journal titleJournal of Alloys and Compounds
Volume509
Issue18
Pages54665471; # of pages: 6
SubjectThin films; Metal hydrides; Neutron reflectometry; Catalysts
AbstractWe present a neutron reflectometry study of deuterium absorption in thin films of Al-containing Mg alloys capped with a Ta/Pd, Ni/Pd and Ti/Pd-catalyst bilayer. The measurements were performed at room temperature over the 0 1 bar pressure range under quasi-equilibrium conditions. The modeling of the measurements provided a nanoscale representation of the deuterium profile in the layers at different stages of the absorption process. The absorption mechanism observed was found to involve spillover of atomic deuterium from the catalyst layer to the Mg alloy phase, followed by the deuteration of the Mg alloy. Complete deuteration of the Mg alloy occurs in a pressure range between 100 and 500 mbar, dependent on the type of bilayer catalyst. The use of a Ti/Pd bilayer catalyst yielded the best results in terms of both storage density and kinetic properties.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number18910972
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Record identifierec38eb3f-1567-49bd-b272-6844e9a63963
Record created2011-11-10
Record modified2016-05-09
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