A method of producing a mixture wherein a plurality of fiber catalysts is produced using a method comprising the following steps of: mixing a plurality of fiber material and a solvent to form a solution, wherein the fiber material has a structure of cellulose, hemicellulose, lignin, sodium alginate, chitosan, polyvinyl alcohol, polyacrylonitrile, polypropylene, polyethylene, polystyrene, polytetrafluoroethene, polyacrylic acid, polyvinylchloride, viscose fiber or a material selected from the group consisting of cellulose, hemicellulose, lignin, sodium alginate, chitosan, polyvinyl alcohol, polyacrylonitrile, polypropylene, polyethylene, polystyrene, polytetrafluoroethene, polyacrylic acid, polyvinylchloride, viscose fiber and a combination thereof, and which structure further comprises specific cation-exchange functional groups; injecting the solution through the spinneret of the spinning nozzle to form at least one specific shape fiber body; subjecting the at least one specific shape fiber body to a coagulation bath of metal salts, whereas the type of metal ions of the coagulation bath of metal salts is cobalt, gold, silver, palladium, platinum, rhodium, ruthenium, osmium, iridium, nickel, aluminum, tungsten or molybdenum; washing the specific shape fiber body with water, drying the specific shape fiber body after washing with water, and cutting or milling the at least one specific shape fiber body to form the plurality of fiber catalysts, and mixing the fiber catalyst, hot melt powder and sodium tetrahydridoborate, wherein the fiber catalyst has a first melting point and the hot melt powder being a hot melt having a second melting point, having the second melting point lower than the first melting point and filling the mixture of fiber catalyst, hot melt and sodium tetrahydridoborate into a mold heating it to a temperature that is between the first melting point and the second melting point. mixing a plurality of fiber material and a solvent to form a solution, wherein the fiber material has a structure of cellulose, hemicellulose, lignin, sodium alginate, chitosan, polyvinyl alcohol, polyacrylonitrile, polypropylene, polyethylene, polystyrene, polytetrafluoroethene, polyacrylic acid, polyvinylchloride, viscose fiber or a material selected from the group consisting of cellulose, hemicellulose, lignin, sodium alginate, chitosan, polyvinyl alcohol, polyacrylonitrile, polypropylene, polyethylene, polystyrene, polytetrafluoroethene, polyacrylic acid, polyvinylchloride, viscose fiber and a combination thereof, and which structure further comprises specific cation-exchange functional groups; injecting the solution through the spinneret of the spinning nozzle to form at least one specific shape fiber body; subjecting the at least one specific shape fiber body to a coagulation bath of metal salts, whereas the type of metal ions of the coagulation bath of metal salts is cobalt, gold, silver, palladium, platinum, rhodium, ruthenium, osmium, iridium, nickel, aluminum, tungsten or molybdenum; washing the specific shape fiber body with water, drying the specific shape fiber body after washing with water, and cutting or milling the at least one specific shape fiber body to form the plurality of fiber catalysts, and mixing the fiber catalyst, hot melt powder and sodium tetrahydridoborate, wherein the fiber catalyst has a first melting point and the hot melt powder being a hot melt having a second melting point, having the second melting point lower than the first melting point and filling the mixture of fiber catalyst, hot melt and sodium tetrahydridoborate into a mold heating it to a temperature that is between the first melting point and the second melting point.