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Journal article · Conference paper

Interaction of hydrogen with an Mg-Al alloy

By Andreasen, A.1; Sørensen, M.B.; Burkarl, R.; Møller, B.; Molenbroek, A.M.; Pedersen, Allan Schrøder1; Andreasen, Jens Wenzel1,2,3; Nielsen, Martin Meedom1,4; Jensen, T.R.

From

Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

Department of Energy Conversion and Storage, Technical University of Denmark2

Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark3

Department of Physics, Technical University of Denmark4

The interaction of hydrogen with an Mg–Al alloy pre-exposed to air have been studied with in situ time resolved X-ray powder diffraction. Phase fractions as a function of time are derived from series of consecutive diffraction patterns allowing kinetic analysis. The apparent activation energy for dehydrogenation of the Mg–Al alloy is found to be 160 kJ/mol.

This is not significantly higher than for pure and fully activated Mg. It is suggested that the addition of Al improves the resistance towards oxygen contamination.

Language: English
Year: 2005
Pages: 323-326
Proceedings: 9th International Symposium on Metal-Hydrogen Systems
ISSN: 18734669 and 09258388
Types: Journal article and Conference paper
DOI: 10.1016/j.jallcom.2005.01.119
ORCIDs: Pedersen, Allan Schrøder , Andreasen, Jens Wenzel and Nielsen, Martin Meedom
Keywords

7-I poly Gas–solid reactions Hydrogen storage materials Intermetallics X-ray diffraction

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