NOVELTY - A composite catalyst comprises carrier which is carbon-based substrate carrier, ligand which is nitrogen-containing 5-membered or 6-membered heterocyclic coordination ligand, linker which is connecting molecule containing carbon-based carrier and nitrogen-containing 5-membered or 6-membered heterocyclic coordinating ligand that are covalently bonded, metal complex which is porphyrin molecule, phthalocyanine molecule, and corrin molecule optionally substituted with iron, cobalt, or manganese, and nitrogen-containing ligand is copper, iron, cobalt, or manganese complexes.    USE - A composite catalyst for molecular oxygen reduction catalyst and fuel battery (all claimed) used for electric automobile.    ADVANTAGE - Process is simple.    DETAILED DESCRIPTION - A composite catalyst of formula (carrier-(linker-ligand-metal complex)n) comprises carrier which is carbon-based substrate carrier, ligand which is nitrogen-containing 5-membered or 6-membered heterocyclic coordination ligand, linker which is connecting molecule containing carbon-based carrier and nitrogen-containing 5-membered or 6-membered heterocyclic coordinating ligand that are covalently bonded, metal complex which is porphyrin molecule, phthalocyanine molecule, and corrin molecule optionally substituted with iron, cobalt, or manganese, nitrogen-containing ligand is copper, iron, cobalt, or manganese complexes in which metal complex and nitrogen-containing 5-membered or 6-membered heterocyclic coordination ligand are formed by coordination bond.n= greater than or equal to 1.    An INDEPENDENT CLAIM is included for preparation of composite catalyst (carrier-(linker-ligand-metal complex)n) which involves connecting nitrogen-containing 5-membered or 6-membered heterocyclic coordination ligand and surface-modified carbon-based carrier through linker by covalent chemical bond to obtain compound of formula (carrier-(linker-ligand)m), and reacting with optionally substituted metal complex.    m= greater than or equal to 1.