Fully reversible hydrogen absorption and desorption reactions with Sc(Al1-xMgx), x=0.0, 0.15, 0.20
2011 (English)In: Journal of Solid State Chemistry, ISSN 0022-4596, E-ISSN 1095-726X, Vol. 184, no 1, 104-108 p.Article in journal (Refereed) Published
The hydrogen storage properties of Sc(Al1−xMgx), x=0.0, 0.15, 0.20, have been studied by X-ray powder diffraction, thermal desorption spectroscopy, pressure-composition-isotherms and scanning electron microscopy techniques. Hydrogen is absorbed from the gas phase at 70 kPa and 400 °C under the formation of ScH2 and aluminium with magnesium in solid solution. The reaction is fully reversible in vacuum at 500 °C and shows the hydrogenation–disproportionation–desorption-recombination (HDDR) behaviour. The activation energy of desorption was determined by the Kissinger method to 185 kJ/mol. The material is stable up to at least six absorption–desorption cycles and there is no change in particle size during cycling.
Place, publisher, year, edition, pages
2011. Vol. 184, no 1, 104-108 p.
Scandium intermetallics, Hydrides, Hydrogen storage materials, X-ray diffraction
Research subject Chemistry with specialization in Inorganic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-107388DOI: 10.1016/j.jssc.2010.10.034ISI: 000286774600015OAI: oai:DiVA.org:uu-107388DiVA: diva2:229060