TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: Activation is provided by mechanical processing, e.g. mixing, grinding, and/or milling processes of the composition. The mechanical process comprises manual mixing, mechanically assisted mixing, ball milling, manual grinding, attritor milling, sand milling, horizontal milling, vertical milling, jet milling, jaw crusher milling, hammer milling, or high pressure dispersion milling. The process comprises exposure of the composition at -100 to +200degreesC, preferably 80-125degreesC.Preferred Component: The composition comprises transition metal catalyst(s) capable of aiding desorption of hydrogen under suitable conditions from the hydrogen storage composition. The transition metal catalysts are combination of transition metals in elemental form, main group-transition metal compositions, transition metal salts, and/or transition metal complexes. The catalysts are transition metal borides, aluminides, carbides, silicides, fluorides, chlorides, bromides, or iodides. The transition metals can be titanium, zirconium, nickel, cobalt, or iron. Aluminum hydride is in combination with metal hydride compounds that are alkali metal hydride compounds from lithium hydride, sodium hydride, or potassium hydride. Aluminum hydride is in combination with metal aluminum hydride compounds of formula M2xM3y(AlHn)z, M4rM5sAlHn, M43-rM5rAlH6, M41-rM5rAlH4, M63-rM7r(AlH6)2, or M61-rM7r(AlH4)2. The metal aluminum hydride is lithium aluminum hydride, lithium sodium aluminum hydride, LiNa2AlH6, sodium aluminum hydride, lithium potassium aluminum hydride, LiK2AlH6, sodium potassium aluminum hydride, NaK2AlH6, or potassium aluminum hydride. The aluminum hydride is alpha-phase, alpha prime-phase, beta-phase, gamma-phase, delta-phase, epsilon-phase, and/or zeta-phase of aluminum hydride. It is in a crystalline or microcrystalline form. The aluminum hydride comprises beta-aluminum hydride or gamma-aluminum hydride.M2 = combination of monovalent metal atoms;M3 =divalent metal atoms or combination of alkaline earth metal atoms;x, y =0 or greater than 0 and less than or equal to 3;z= 1-9;n= 4-6;M4, M5 = alkali metal atom from Li, Na, or K;r, s = 0 or greater than 0 and less than or equal to 3; andM6, M7 = alkaline earth metal atom, preferably Ca, Mg, or Sr.Provided that at least one of x and y is not zero. When n is 4, then z is equal to the sum of x and 2y; when n is 5, then 2z is equal to the sum of x and 2y; and when n is 6, then 3z is equal to the sum of x and 2y. Provided that r and s are not both 0, and when r or s is zero, then M4 is not identical to M5. When n is 4, the sum of r and s is one, when n is 5, the sum of r and s is 2, and when n is 6, the sum of r and s is 3.Preferred Composition: The stimulant is present in a molar amount of approximately 25% or approximately 1%, preferably 10-25% of the combined molar amounts of aluminum hydride plus stimulant.