Abstract
This study employed a fast, simple and cost-effective hydriding combustion synthesis (HCS) to prepare nano/submicron Mg based alloys, which are the most promising solid state hydrogen storage materials owing to their high storage capacity (7.6 wt.%) and highest volumetric density. The microstructural and absorption/desorption kinetic properties of the prepared MgH2 samples were characterized and compared with commercially available MgH2 powders. The detailed BET analysis of the HCS prepared samples showed a higher surface area than that of commercial MgH2, which resulted in better absorption/desorption kinetics. The HCS-prepared MgH2 powder absorbed 6.2 wt.% H2 with a rate of 0.31 wt.%/min, whereas it desorbed at a rate of 0.98 wt.%/min. These results highlight the superiority of the HCS method to prepare MgH2 powders over conventional ingot-metallurgy.
Original language | English |
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Pages (from-to) | 42-45 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 66 |
Issue number | 1 |
DOIs | |
State | Published - 1 Jan 2012 |
Externally published | Yes |
Keywords
- Absorption/desorption kinetics
- FESEM
- Hydriding combustion
- Hydrogen storage
- Mg-based alloys