NOVELTY - Catalytic composition comprises at least one modified or unmodified nanostructured biomaterial in contact with at least one hydride source.    USE - The catalyst composition is useful: in catalytic hydrogen storage system for storing hydrogen; and in catalytic process including hydrogenation, dehydrogenation, isomerization, carbonylation, hydroformylation, dimerization, oligomerization, polymerization, oxidation, metathesis, condensation, alkane activation, Fischer-Tropsch catalysis, hydroformylation, oxychlorination, butadiene synthesis, 1-hexene synthesis, water-gas shift reaction, methanol synthesis, formaldehyde synthesis, carbon monoxide reduction, reductive carbon monoxide polymerization, condensation, alkane activation, methane activation, methanol homologation, carbon monoxide activation, formyl intermediate generation, hydroxymethyl intermediate generation, hydroxymethylene intermediate generation, carbide intermediate generation, carbyne intermediate generation, carbene intermediate generation, acetic anhydride synthesis, vinyl acetate synthesis, ethylene glycol synthesis, methyl formate synthesis, methyl methacrylate synthesis, hydrocyanation, cycloadditions, insertion, ring opening, carbon-hydrogen bond activation, olefin metathesis, Heck reaction, Friedel-Crafts reactions, conversion of nitrogen oxides to oxygen and nitrogen, reaction of carbon monoxide and nitrogen monoxide to form carbon dioxide and nitrogen, carbon monoxide oxidation, hydrocarbon oxidation, enantioselective oxidation, enantioselective hydrogenation, alkylation, catalytic cracking, naphtha reforming, steam reforming, hydrogenation, hydrodesulfurization, hydrodenitrogenation, hydrodeoxygenation, hydrodemetallation, the Haber process, esterification, methyl acetate synthesis, a fuel cell anodic half reaction, or a fuel cell cathodic half-reaction (all claimed).    ADVANTAGE - The catalytic composition: can reversibly desorb and resorb hydrogen gas at lower temperature and/or pressure in an efficient manner as compared to the hydride source in the absence of the nanostructured biomaterial; and provides improved hydrogen storage system which is recyclable, exchangeable, cost-effective, inherently safe, has longer cycle life, and allows relatively high-energy density storage for hydrogen.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a catalytic hydrogen storage system (100) comprising: a sealed environment (102) operable to receive the catalytic composition; a gas including hydrogen, deuterium or tritium; and an environmental control system (106) operable to control the pressure of the gas and/or the temperature within the sealed environment, where the catalytic composition stores the gas upon heating and exposure to the gas;    (2) storing hydrogen, comprising: providing the catalytic composition; exposing the catalytic composition to hydrogen; and storing at least a portion of the hydrogen in the catalytic composition; and    (3) a catalytic process, comprising: providing the catalytic composition; providing at least one reagent to be transformed by a catalytic process; and contacting, under catalytic conditions, the catalytic composition and the at least one reagent.    DESCRIPTION OF DRAWING(S) - The figure illustrates the schematic representation of a hydrogen storage system.    System (100)    Sealed environment (102)    Hydrogen source (104)    Environmental control device (106)    Nanostructure assembly (112)