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A new material for hydrogen storage; ScAl0.8Mg0.2

Författare:
  • Martin Sahlberg
  • Premysl Beran
  • Thomas Kollin Nielsen
  • Yngve Cerenius
  • Krisztina Kadas
  • Marko P. J. Punkkinen
  • Levente Vitos
  • Olle Eriksson
  • Torben R. Jensen
  • Yvonne Andersson
Publiceringsår: 2009
Språk: Engelska
Sidor: 3113-3117
Publikation/Tidskrift/Serie: Journal of Solid State Chemistry
Volym: 182
Nummer: 11
Dokumenttyp: Artikel
Förlag: Elsevier Science

Sammanfattning

A novel aluminium rich alloy for hydrogen storage has been discovered, ScAl0.8Mg0.2, which has very promising properties regarding hydrogen storage capacity, kinetics and stability towards air oxidation in comparison to hydrogen absorption in state-of-the-art intermetallic compounds. The absorption of hydrogen was found to be very fast, even without adding any catalyst, and reversible. The discovered alloy crystallizes in a CsCl-type structure, but decomposes to ScH2 and Al(Mg) during hydrogen absorption. Detailed analysis of the hydrogen absorption in ScAl0.8Mg0.2 has been performed using in situ synchrotron radiation powder X-ray diffraction, neutron powder diffraction and quantum mechanical calculations. The results from theory and experiments are in good agreement with each other. (C) 2009 Elsevier Inc. All rights reserved.

Disputation

Nyckelord

  • Physics and Astronomy
  • diffraction
  • X-ray
  • Hydrogen storage materials
  • Scandium intermetallics
  • Hydrides

Övriga

Published
Yes
  • ISSN: 0022-4596

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