Storage. -Mg3Ag is prepared as a hydrogen storage medium by reactive sintering of compressed pellets of MgH2 and Ag powders in a molar ratio of 3:1 at 400°C for 2 h under Ar atmosphere. The compound is able to absorb 2.0 wt.% H2 and exhibits reversible hydration/dehydration properties with enhanced cycling stability. It shows a capacity retention of 95% after 30 cycles. -(SI, T. Z.; ZHANG, J. B.; LIU, D. M.; ZHANG*, Q. A.; J. Alloys Compd. 581 (2013) 246-249, http://dx.
Structure D 2000Crystal Structures and Hydrogen-Induced Decomposition of La(Mg 1-x Al x ) 3 Alloys.-The title alloys (x = 0.1, 0.2, 0.3, 0.4) are characterized by XRD, SEM, and their hydrogenation reactions. The compound La6Mg22Al, existing in these alloys crystallizes with the Th6Mn23-type structure in the space group Fm3m. All the phases decompose into LaH3, MgH2, and La3Al11 under hydrogen at 473 K. -(ZHANG*, Q. A.; LIU, Y.
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