TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Material: The electroconductive material is metal, semiconductor, carbon-type compound, or conductive polymer. Preferred Catalyst: The catalyst further contains another metal (ion), and a doped anion. The catalyst material is a particulate material, a fiber-like material, a hollow material, or a cone-like material. Preferred Method: Heat-processing is carried out after coordinating the catalyst metal.    TECHNOLOGY FOCUS - METALLURGY - Preferred Metal: The catalyst metal is cobalt, iron, molybdenum, chromium and/or iridium.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The complex monocyclic compound is a monocyclic-ring property compound having pyrrole, vinylpyridine, aniline or thiophene basic structure. Preferably, the complex monocyclic compound is pyrrole, dimethyl pyrrole, pyrrole-2-carboxy aldehyde, pyrrole-2-alcohol, vinylpyridine, aniline, aminobenzoic acid, or thiophene.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Material: The electroconductive material is metal, semiconductor, carbon-type compound, or conductive polymer. Preferred Catalyst: The catalyst further contains another metal (ion), and a doped anion. The catalyst material is a particulate material, a fiber-like material, a hollow material, or a cone-like material. Preferred Method: Heat-processing is carried out after coordinating the catalyst metal.    TECHNOLOGY FOCUS - POLYMERS - Preferred Complex: The polynuclear complex molecule is polypyrrole complex, polyvinyl-pyridine complex, polyaniline complex, or polythiophene complex. Preferred Method: The electrolytic polymerization of the monocyclic-ring property compound is carried out to the electroconductive material, and the catalyst metal (salt) is reacted. Or, the catalyst material is obtained by carrying out electrolytic polymerization of the coordinated compound. EXAMPLE - Pyrrole (5.4 ml) and carbon particles (3 g) were dissolved in methanol (200 ml) containing ammonium perchlorate as supporting electrolyte. Argon de-aeration was carried out for 30 minutes. Electrolytic polymerization was carried out for 45 minutes using a fluid bed electrode, to obtain polypyrrole-coated carbon particles. Cobalt acetate (4.1 g) and polypyrrole-coated carbon particles (2 g) were taken in a flask, and methanol was added. Refluxing was carried out for 2 hours, after argon de-aeration for 30 minutes. The solid substance was filtered, and the carbon particles (catalyst particles) were dried under reduced pressure at 120degreesC for 3 hours to obtain pyrrole-cobalt complex coated with electrolytic-polymerization film. The catalyst particles had excellent oxygen reduction catalytic activity. The coordination number of cobalt-nitrogen was 3.87, and the bond distance was 2.06 Angstrom .