NOVELTY - Preparing hydrogen fuel cell catalyst comprises e.g. dissolving ferric trichloride in methyl orange solution, adding pyrrole monomer, stirring and reacting, taking filter residue, rinsing residue with deionized water, drying to remove water to obtain polypyrrole nanotube, taking polypyrrole nanotube, alkali metal hydroxide and dihaloalkane, dispersing in the first organic solvent, stirring and reacting, obtaining filter residue, washing, removing water to obtain halogenated polypyrrole nano tube, preparing modified polypyrrole nano tube, preparing platinum loaded polypyrrole nano tube.    USE - The method is useful for preparing hydrogen fuel cell catalyst (claimed).    ADVANTAGE - The method forms calcined carbonaceous material having a high specific surface area and platinum loaded nano particle exhibiting synergistic effect, thus increasing catalytic efficiency.    DETAILED DESCRIPTION - Preparing hydrogen fuel cell catalyst comprises (i) dissolving ferric trichloride in methyl orange solution, adding pyrrole monomer, stirring and reacting for 10-30 hours, taking filter residue, rinsing residue with deionized water until the filtrate is colorless, drying to remove water to obtain polypyrrole nanotube, (ii) taking the polypyrrole nanotube, alkali metal hydroxide, and dihaloalkane, dispersing in the first organic solvent, stirring and reacting at 40-80 degrees C for 10-30 hours, obtaining the filter residue, washing using deionized water, using second organic solvent for washing residue multiple time, again removing water to obtain halogenated polypyrrole nano tube, (iii) dispersing halogenated polypyrrole nano tube and imidazole in the first organic solvent, stirring and reacting at 40-80 degrees C for 10-30 hours, obtaining filter residue, filtering using deionized water, using second organic solvent for washing residue multiple times, again removing water to obtain modified polypyrrole nano tube, (iv) taking the modified polypyrrole nano-tube, polyvinyl pyrrolidone, dispersant and water, then adding chloroplatinic acid solution, stirring and reacting at 10-30 degrees C for 2-5 hours, adding sodium borohydride, continuously stirring and reacting for 10-20 hours, centrifuging using deionized water, using second organic solvent for washing residue multiple times to obtain platinum loaded polypyrrole nano tube, and (v) using the platinum loaded polypyrrole nano tube, under inert gas atmosphere, sintering at 700-1100 degrees C for 1-5 hours. An INDEPENDENT CLAIM is also included for hydrogen fuel cell catalyst, prepared according to the above mentioned method.