 The paper reviews recent research on the effects of microstructural refinement and nanocatalytic additives on hydrogen storage properties of metal and complex hydrides obtained in allied laboratories at the University of Waterloo, Canada, and Military University of Technology, Warsaw, Poland. The study shows that microstructural refinement has a modest effect on hydrogen storage properties, while the addition of nanometric elemental metals as catalysts brings about significant improvements in hydrogen absorption slash desorption kinetics. Catalytic precursors react with the hydride matrix to form metal salts and free nanometric or amorphous elemental metals slash intermetallics, which act catalytically. However, these catalysts only change the kinetic properties of hydrogen absorption slash desorption rate but do not affect thermodynamics and enthalpy change of hydrogen sorption reactions. The study shows that a complex metal hydride, Leal H4, after high-energy ball milling with a nanometric NIMel catalyst and or MNCl2 catalytic precursor, can dwarf relatively large quantities of hydrogen at room temperature, 40 degrees Celsius, and 80 degrees Celsius. This behavior is encouraging for the future development of solid-state hydrogen systems. This article was authored by Jersey Mr. Zicky, Merrick Polanski, Les Xbroniak, and others. We're article.tv, links in the description below.