Structural investigations showed that the crystal structure influences the hydrogen storage properties of MgH 2 . The crystal structure and dehydriding temperature of MgH 2 activated by high energy ball milling under an argon atmosphere were studied. The X-ray diffraction characterization showed that a small amount of tetragonal α-MgH 2 phase transforms into crystalline γ-MgH 2 of an orthorhombic structure during milling, and γ-MgH 2 peak intensity increased with increasing ball milling time within a certain limit, but disappeared early in the hydrogenation cycle at a temperature of 300 °C. We studied the phase structure and the stability of the MgH 2 during absorption/desorption cycles as well as thermal stability in a context of sustainable use of MgH 2 .
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology