it is to be understood by one of ordinary skill in the art that the present discussion is a description of exemplary embodiments only and is not intended as limiting the broader aspects of the present invention which broader aspects are embodied in the exemplary constructions in describing the various figures herein the same reference numbers are used throughout to describe the same material apparatus or process pathway to avoid redundancy detailed descriptions of much of the apparatus once described in relation to a figure is not repeated in the descriptions of subsequent figures although such apparatus or process is labeled with the same reference numbers in accordance with the present invention it has been found that borohydrides such as alkali borohydrides may be catalyzed with effective amounts of various oxides and chlorides of titanium zirconium tin along with transition metal oxides and other metal and non metal oxides halides and combinations of catalysts so as to reduce the temperature release point for hydrogen additionally the incorporation of effective amounts of catalysts in a mixture with the borohydrides has been found to permit the rehydriding of hydrogen into the mixture material under conditions of elevated temperatures and pressures as seen in reference to table 1 the.