Effect of activated alloys on hydrogen discharge kinetics of MgH₂ nanocrystals

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DOIResolve DOI: http://doi.org/10.1016/j.jallcom.2007.01.138
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TypeArticle
Journal titleJournal of Alloys and Compounds
Volume455
Issue1-2
Pages432439; # of pages: 8
SubjectHydrogen storage materials; Intermetallics; Nanostructures; High-energy ball milling; X-ray diffraction
AbstractActivated alloys synthesized by arc-melting were examined as catalysts for improving the hydrogen sorption characteristics of nanostructured magnesium hydride, proposed as a reversible hydrogen storage material. The MgH₂-catalyst absorbing materials were prepared by ball milling of pure MgH₂ with hydrided Zr₄₇Ni₅₃, Zr₉Ni₁₁, and other investigated alloys. The nanostructured MgH₂-intermetallic systems were tested at 250 ◦C and catalyst addition of eutectoid Zr₄₇Ni₅₃ resulted in the fastest desorption time and highest initial desorption rate. Also, the catalyzed Mg-hydride with activated Zr9Ni11 and Zr₇Ni₁₀ phases showed fast desorption kinetics. Moreover, the results demonstrated that the composition of dispersed ZrxNiy catalysts has a strong influence on the amount of accumulated hydrogen and desorption rate of Mg-nanocomposite.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number52118
NPARC number15336745
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Record identifier49732022-03d6-449f-b112-883e8656ca0d
Record created2010-05-26
Record modified2016-05-09
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