ABSTRACT
Microcrystalline hydride materials have been prepared by arc or induction melting and annealing. The method for preparing hydrogen storage materials evolves with the development of alloying techniques. The properties of hydrogen storage materials have been significantly improving through chemistry and microstructure modifications. Several hydrogen storage systems are available, such as metallic compounds, complex hydrides, nanomaterials, metal organic frameworks, calthrate hydrides, molecular sieve, and so on, to achieve the common goals of hydrogen storage materials. The technique of mechanical alloying to synthesize novel alloy phases and to produce hydrogen storage nanomaterials has attracted the attention of a large number of researchers. The cleanliness of the surface of nanocrystalline alloys prepared by mechanical alloying method was studied by X-ray photoelectron spectroscopy and Auger electron spectroscopy. Hydrogen storage material research has entered a new and exciting period with the development of nanocrystalline alloys, which show substantially enhanced absorption/desorption kinetics.
