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Equilibria E 4000Altering Hydrogen Storage Properties by Hydride Destabilization Through Alloy Formation: LiH and MgH2 Destabilized with Si. -Alloy formation with Si occurring upon dehydrogenation destabilizes LiH and MgH2. In the LiH/Si system, a Li2.35Si alloy forms upon dehydrogenation, causing the equilibrium hydrogen pressure to increase. In the MgH2/Si system, Mg2Si forms upon dehydrogenation. Thermodynamic calculations indicate equilibrium pressures of 1 bar at approximately 20°C and 100 bar at approximately 150°C. It is concluded that the MgH2/Si system, with a hydrogen capacity of 5.0 wt%, could be practical for hydrogen storage at reduced temperatures. The LiH/Si system is reversible and can be cycled without degradation, whereas the MgH2/Si system is not readily reversible. The two alloy systems show how hydride destabilization through alloy formation upon dehydrogenation can be used to design and control equilibrium pressures of strongly bound hydrides. -(VAJO*, J. J.; MERTENS, F.; AHN, C. C.; BOWMAN, R. C. J.; FULTZ, B.; J.

Some properties of the tritide phases formed by the intermetallic compounds Kg.Ni, ZrNi, and

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Solid state NMR is widely applied in studies of solid state chemistries for hydrogen storage reactions. Use of 11 B MAS NMR in studies of metal borohydrides (BH 4 ) is mainly focused, revisiting the issue of dodecaborane formation and observation of 11 B{ 1 H} Nuclear Overhauser Effect.