METHOD FOR PRODUCING STRONGLY ACIDIC ZIRCONIUM PARTICLES, METHOD FOR PRODUCING PROTON CONDUCTING MATERIAL AND PROTON CONDUCTING FILM, PROTON CONDUCTING FILM, ELECTRODE FOR FUEL CELL, FILM-ELECTRODE JOINED BODY, FUEL CELL

摘要

The disclosed method enables zirconium sulfophenyl phosphonate, zirconium sulfate, or zirconia sulfate, which are high performance materials as proton conducting materials and which have high catalytic activity, to be produced at a low temperature by means of adding and reacting sulfophenyl phosphonic acid or sulfuric acid with zirconium nanoparticles, which are a precursor of strongly acidic zirconium particles, and which are obtained by reacting zirconium alkoxide, zirconium butoxide as a chelating agent, and nitric acid as a catalyst in isopropyl alcohol as a solvent.