Enhancement of hydrogen-storage properties of Mg by reactive mechanical grinding with oxide, metallic element(s), and hydride-forming element

Myoung-Youp Song (1) , Sung Nam Kwon (2) , Jean-Louis Bobet (3) , Hye Ryoung Park (4)

1 Division of Advanced Materials Engineering, Research Center of Advanced Materials Development
2 Department of Hydrogen and Fuel Cells
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
4 Faculty of Applied Chemical Engineering

In order to improve the hydrogen-storage properties of magnesium, oxides, metallic element(s) and a hydride-forming element were added to Mg by grinding under a hydrogen atmosphere (reactive mechanical grinding). As the oxides, Fe₂O₃ purchased, Fe₂O₃ prepared by spray conversion, MnO purchased, SiO₂ prepared by spray conversion, and Cr₂O₃ prepared by spray conversion were chosen. As the metallic elements, Ni, Fe, and Mo were selected. In addition, as the hydride-forming element, Ti was selected. Samples with the compositions of Mg–10 wt%oxide, 76.5 wt%Mg–23.5 wt%Ni, 71.5 wt%Mg–23.5 wt%Ni–5wt% Fe₂O₃, 71.5 wt%Mg–23.5 wt%Ni–5 wt%Fe, and Mg–14 wt%Ni–2 wt%Fe–2wt%Ti–2 wt%Mo were prepared. The hydrogen-storage properties and changes in phase and microstructure after the hydriding–dehydriding cycling of the prepared samples were then investigated.

Domaines: Matériaux

Myoung-Youp Song, Sung Nam Kwon, Jean-Louis Bobet, Hye Ryoung Park. Enhancement of hydrogen-storage properties of Mg by reactive mechanical grinding with oxide, metallic element(s), and hydride-forming element. Ceramics International, 2011, 37 (3), pp.897-902. ⟨10.1016/j.ceramint.2010.11.010⟩. ⟨hal-00566117⟩