TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Metal: The noble metal is palladium, iridium, rhodium, or platinum. The transition metal is cobalt, iron, molybdenum, or chromium. Preferred Property: The conductive material has a specific surface area of 500-2000 m2/g, and has an average particle size of 3-30 nm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The heteromonocyclic compound is 2-(1H-pyrrol-3-ylpyridine). The nitrogen-containing low-molecular-weight compound is pyridine and/or phenanthroline.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: Polymerizing is carried out in a water-methanol or water-ethanol mixed solvent. It is carried out using ammonium perchlorate or PTS as a supporting electrolyte. The electrochemical polymerization and/or the metallation are carried out more than one time. During metallation, a noble metal and a transition metal are coordinated at the same time. Heat treatment is carried out after metallation. A nitrogen-containing low-molecular-weight heterocyclic compound is coordinated as an ancillary ligand to the catalytic metal. EXAMPLE - In 200 mL water/methanol mixed solvent containing 0.1 M ammonium perchlorate or PTS as a supporting electrolyte, was dissolved 5.4 mL pyrrole and 3 g carbon particles. After 30-minute argon deaeration, electrochemical polymerization was performed using a fluidized bed electrode for 45 minutes by constant potential method at applied voltages of 1.8, 1.2 and 1.3 V to yield polypyrrole-coated carbon particles. The amount of pyrrole used was 10 times the amount calculated based on the assumption that polypyrrole was attached to the surface area (800 m2/g) of carbon particles leaving no space among them. About 2 g polypyrrole-coated carbon particles, 4.08 g cobalt acetate and 1.84 g palladium acetate were placed in a 200 ml eggplant-shaped flask and dimethyl formamide was added. After 30-minute argon deaeration, the mixture was refluxed for 2 hours. The mixture was subjected to suction filtration to filter off the solid content, and the solid content was vacuum dried at 120degreesC for 3 hours to yield carbon particles coated with electrochemically polymerized polypyrrole film having a pyrrole-cobalt complex. The carbon particles coated with electrochemically polymerized polypyrrole film of pyrrole-cobalt complex was heat treated at 600degreesC for 2 hours in an atmosphere of argon gas. Results showed that electrochemical polymerization produced high oxygen reduction potential and peak current density, thus yielding a highly active catalyst.