Two-dimensional MXenes, such as Ti3C2 and other transitional metal carbides (Ni3C, Mo2C, Cr3C2 and NbC) were used to enhance the H2 storage behavior of MgH2. The carbides were introduced into MgH2 by mechanical ball milling without changing their phase. Ti3C2 shows the best catalytic effect on dehydrogenation kinetic properties of MgH2, followed by Ni3C, NbC, Mo2C and Cr3C2. 109 Ti3C2 and Ni/Ti3C2 serve as dehydrogenation catalysts for metal hydrides. A recent study on hydrogen physisorption on AM-2DSnC (AM = Li, Na, and K) complexes reported that the K-2D SnC monolayer has the highest hydrogen-storage capacity with one potassium atom adsorbing up to 6 hydrogen molecules, followed by Na-2D SnC with 5 hydrogen molecules and Li-2D SnC with 3 hydrogen molecules; demonstrating the possibility of these complexes overcoming the US-DOE recommended target of 5.5 wt% for onboard automotive systems. Bilayer hexagonal boron nitride (h-BN) shows a trend of decreasing binding energies and desorption temperatures that is useful for potential H2 storage. The theoretically calculated overall storage capacity of the bilayer is 6.7 wt % with Eads of 0.223 eV/H2. 112 TiO2-coated boron nitride nanofibers showed improved morphology, surface area and hydrogen storage. In a recent study, alkali-earth metal (Be, Mg and Ca) encapsulated Al12N12 nanoclusters have been considered for hydrogen storage via adsorption and demonstrated: an increase in adsorption energy when compared to untreated Al12N12 and H2-Al12N12 and a decrease in the HOMO-LUMO energy gap. Another example of nanomaterials for hydrogen storage is g-C3N, a graphitic carbon nitride whose structure permits the storage of a significant amount of hydrogen. .