TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Compounds: The proton conductive inorganic nanoparticles are zirconium compound, titanium compound, cerium compound, uranium compound, tin compound, vanadium compound, antimonide, calcium hydroxyapatite and hydration calcium hydroxyapatite. The zirconium compound is of formulae: ZrO2, ZrO2.nH2O, Zr(HPO4)2, Zr(HPO4)2.nH2O, Zr(HSO3)2, Zr(HSO3)2.nH2O, Zr(O3P-R1-SO3H)2, Zr(O3P-R1-SO3H)2.nH2O, Zr(O3P-R2-SO3H)2-x(O3P-R3-COOH)x and/or Zr(O3P-R2-SO3H)2-x(O3P-R3-COOH)x.nH2O, where R1-R3=divalent organic group. The titanium compound is of formulae: TiO2, TiO2.NH2O, Ti(HPO4)2, Ti(HPO4)2.nH2O, Ti(HSO3)2 and/or Ti(HSO3)2.nH2O. An electronic conductor of the catalyst layer is carbon-type porous electronic conductor or metal-type porous electronic conductor. The carbon-type porous electronic conductor is carbon black, acetylene black, graphite, carbon fiber, carbon nanotube, fullerene, activated charcoal and glass carbon. A catalyst contained in the catalyst layer is precious metal-type catalyst and organic catalyst. The proton conductive hybrid material contains proton conductive inorganic mesoporous material and proton conductive polymer. The proton conductive inorganic mesoporous material is same as the proton conductive inorganic nanoparticles.Preferred Process: The proton conductive inorganic nano particles or its precursor is obtained by hydrolyzing solution containing alkoxide of zirconium, titanium, cerium, uranium, tin, vanadium, arsenic and calcium, in organic solvent.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compounds: The polar organic solvent is chosen from N,N-dimethylformamide, dimethyl sulfoxide, 1-methyl pyrrolidone and N-methyl acetamide. A poor organic solvent of the dispersion is methanol, ethanol, isobutanol, butanol and hexane.    TECHNOLOGY FOCUS - POLYMERS - Preferred Compounds: The proton conductive polymer is hydrocarbon-type polymer(s) which is capable of dissolving in polar organic solvent, or sulfonated hydrocarbon-type polymer(s).