genic tanks, (2) high-pressure gas cylinders, and tate H 2 storage technique. Amongst them, solidtorage technique has been attracting considerable ecause it is operatable under moderate temperaearly ambient pressure condition, realizing higher sity and improved operability. The first discovery s-based H 2 storage was made in 1869 by T. Gra- [6] , in which the distance between hydrogen atoms ntly decreased when the hydrogen atoms are abcoordinated with host materials [7] . Subsequently, rts have been devoted to developing extensive hyrage materials due to the low geological reserves ilestone breakthrough was achieved in the 1970s by the development of non-noble metal materials, Ni 5 and FeTi [ 8 , 9 ]. These materials not only reost of solid-state H 2 storage but also demonstrate n be reversibly absorbed/desorbed under relatively on conditions [8] . ed by the successful development of intermetallic materials, hydrides of light metals have been inattracting attention, aiming to enhance the hydroe density [10] . One of its promising playgrounds um (Mg)-based compounds, which host the merd capacity as high as 7.6%, satisfying the US t of Energy (DOE) target, excellent reusability, tal-friendly, and high Clarke number characteris-]. However, the mass-scale commercialization of H 2 storage systems (e.g., using in fuel cell vehi-))