NOVELTY - Releasing hydrogen from hydrogen storage materials comprises conducting a hydrogen production reaction by reacting a first hydrogen storage material composition with a second hydrogen storage material composition; and conducting a regeneration reaction utilizing the oxide composition to form a species of a second hydride and/or a second hydroxide.    USE - The invention deals about a preparation of hydrogen from hydrogen storage materials, and preparation of source of hydrogen gas. The hydrogen is used as a fuel in fuel cells.    ADVANTAGE - The method is an exothermic reaction (claimed). The present invention provides an improved hydrogen storage composition, which is useful as a storage medium. The method reduces the overall energy requirement for a system of storing and subsequently releasing hydrogen. The method reduces the overall enthalpy changes associated with the hydrogen storage material system resulting in an improvement of the overall efficiency of the fuel cell systems. The hydrogen is used as a fuel in fuel cells, which minimizes the heating and cooling systems in mobile units (e.g. vehicles or electronic devices). The energy required for hydrogen production and recharge is relatively low, and vastly improved when compared to energy requirement of existing hydrogen storage systems. The method provides solid phase storage of hydrogen.    DETAILED DESCRIPTION - Method for releasing hydrogen from hydrogen storage materials comprises: conducting a hydrogen production reaction by reacting a first hydrogen storage material composition (comprising a first hydride) with a second hydrogen storage material composition (comprising a first hydroxide having one or more cationic species other than hydrogen) to produce hydrogen and an oxide composition; and conducting a regeneration reaction utilizing the oxide composition to form a species of a second hydride and/or a second hydroxide.    INDEPENDENT CLAIMS are also included for:    (1) a method of producing a source of hydrogen gas comprising conducting a hydrogen production reaction in a hydrogenated starting material composition comprising a starting material hydride and a starting material hydroxide, each of the starting material hydride and the starting material hydroxide having one or more cationic species other than hydrogen, to produce hydrogen gas and a dehydrogenated reaction product comprising an oxide; and conducting a regeneration reaction by utilizing the dehydrogenated reaction product to form a regenerated hydrogenated material; and    (2) a method for releasing hydrogen from hydrogen storage materials.