Fig. 5: Characterization of hydrogen adsorption in γ-Mg(BH4)2 by volumetric methods.
From: Small-pore hydridic frameworks store densely packed hydrogen
a, Comparison of the isosteric heat of hydrogen adsorption for γ-Mg(BH4)2 and a MOF compound (Cu–BTC, which has a similar pore diameter and H2 uptake) as a function of surface coverage, recalculated to the H2 loading per formula unit. Black squares indicate γ-Mg(BH4)2 and red circles Cu–BTC21. b, High-resolution low-pressure H2 adsorption isotherms for γ-Mg(BH4)2 at various temperatures between 20 and 70 K. With increasing temperature, two clear steps in the adsorption isotherms become visible.
