Improved dehydrogenation properties of the combined Mg(BH4)2ADT6NH3anNH3BH3 system

A combined strategy via mixing Mg(BH4)2ADT6NH3 with ammonia borane (AB) is employed to improve the dehydrogenation properties of Mg(BH4)2ADT6NH3. The combined system shows a mutual dehydrogenation improvement in terms of dehydrogenation temperature and hydrogen purity compared to the individual components. A further improved hydrogen liberation from the Mg(BH4)2ADT6NH3a6AB is achieved with the assistance of ZnCl2, which plays a crucial role in stabilizing the NH3 groups and promoting the recombination of NHI'+a=HBI'a. Specifically, the Mg(BH4)2ADT6NH3a6AB/ZnCl2 (with a mole ratio of 1:0.5) composite is shown to release over 7 wt.% high-pure hydrogen (>99 mol%) at 95 degree C within 10 min, thereby making the combined system a promising candidate for solid hydrogen storage.