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Hydrogen absorption and desorption properties of a novel ScNiAl alloy

Författare:
  • Adam Sobkowiak
  • Jonas Angstrom
  • Thomas Kollin Nielsen
  • Yngve Cerenius
  • Torben R. Jensen
  • Martin Sahlberg
Publiceringsår: 2011
Språk: Engelska
Sidor: 235-238
Publikation/Tidskrift/Serie: Applied Physics A - Materials Science and Processing
Volym: 104
Nummer: 1
Dokumenttyp: Artikel
Förlag: Springer

Sammanfattning

A new hydrogen absorbing material has been discovered, ScNiAl, which can store 1.5 wt.% hydrogen reversibly. In this compound, hydrogen absorption is a two-step process; solid solution of hydrogen at temperatures below 180A degrees C and decomposition into ScH2 and NiAl at higher temperatures. Detailed analysis of the hydrogen absorption/desorption has been performed using in situ synchrotron radiation powder X-ray diffraction and thermal desorption spectroscopy. The apparent activation energy for hydrogen desorption was determined to be 182 kJ/mol and the material is stable during cycling.

Disputation

Nyckelord

  • Technology and Engineering

Övriga

Published
Yes
  • ISSN: 0947-8396

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