Characterisation of Hydrogen Release Behaviour in Cast Mg-Ni Alloys by Synchrotron XRD and XAFS

Kazuhiro Nogita; Marc Jenke; David Wood; Andrew Duguid; Stuart D. McDonald

doi:10.4028/www.scientific.net/MSF.654-656.2851

Paper Titles

Influence of Temperature on Self-Discharge and High-Rate Discharge Characteristics of La-Rich AB₅-Based MH Alloy Electrode
p.2835

Effect of Annealing on the Hydrogen Permeation and Mechanical Behaviour of Nb-Ni-Zr Alloy Membranes
p.2839

Hydrogen Storage Properties of Mg-Ni Alloy Catalysed by Multi-Walled Carbon Nanotubes
p.2843

The Effects of Cryogenic Milling and Catalytic Additives on the Hydrogen Desorption Behaviour of Nanostructured MgH₂
p.2847

Characterisation of Hydrogen Release Behaviour in Cast Mg-Ni Alloys by Synchrotron XRD and XAFS
p.2851

Hydrogen Exchange Effect in MgH₂-LiBH₄ System
p.2855

Observation of Hydrogen Distribution in a Eutectic Mg-Ni Alloy by the Silver Decoration Method
p.2859

Catalysing Effect of Intermetallic Compounds on Hydrogen Desorption Kinetics in Cast Magnesium Alloys
p.2863

In-Situ TEM Observation for Dehydrogenation Mechanism in MgH₂ with Catalyst
p.2867

HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Characterisation of Hydrogen Release Behaviour in...

Characterisation of Hydrogen Release Behaviour in Cast Mg-Ni Alloys by Synchrotron XRD and XAFS

Abstract:

Alloys of the hypo-eutectic Mg-Mg2Ni system can be modified by trace elemental additions which change the microstructure and the functional properties. The modified microstructure results in improvements to the hydrogen storage properties. In alloys of optimal composition, it has been shown that the reversible storage of 6.5-7wt% H2 is possible at a rate of reaction that is realistic for industrial applications. This paper discusses the mechanism of hydrogen release in air at atmospheric pressure with in-situ crystallographic phase transformation analysis obtained by synchrotron radiation X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS).