NOVELTY - A noble metal oxide comprises ruthenium-iridium oxide. The noble metal oxide is obtained by providing amino modified silicon oxide molecular sieve, aminopropyl ethyl silicate and ethanol, dissolving soluble ruthenium and/or iridium noble metal salt in deionized water, adding aqueous solution of noble metal salt solution, washing solid with deionized water or ethanol, drying, heating, calcining, roasting, etching silicon oxide in hydrofluoric acid solution, removing silicon oxide composite and washing in vacuum oven.    USE - Noble metal oxide is used as regenerative fuel cell, photoelectric catalysis and electrolysis hydrogen generator device (all claimed).    ADVANTAGE - The noble metal oxide is efficiently prepared, by a simple method.    DETAILED DESCRIPTION - A noble metal oxide comprises ruthenium-iridium oxide (RuxIr1-xO2, where x is 0-1). The noble metal oxide is obtained by providing amino modified silicon oxide molecular sieve SBA-15 as template, aminopropyl ethyl silicate as modifier silica zeolite, and ethanol as solvent, controlling the reaction conditions and aminopropyl ethyl silicate template, grafting on surface of basic amino group, adding amino silane with concentration of 0.5-4 wt.% in ethanol, reacting at 20-80 degrees C for 0.5-8 hours, the separating by filtration, washing with ethanol at 40-80 degrees C in vacuum oven and drying for 4-24 hours, dispersing amino-modified silica zeolite in deionized water, adding soluble ruthenium and/or iridium noble metal salt, stirring to fully dissolve, dissolving soluble ruthenium and/or iridium noble metal salt with concentration of 0.01-0.1 M in deionized water, non-oxidizing under nitrogen or argon atmosphere, adding aqueous solution of noble metal salt solution, reducing the reaction time for 1-24 hours, standing solution at 20-60 degrees C, aging for 0-12 days, separating, washing solid with deionized water or ethanol until the solution is neutral, drying at 40-80 degrees C, obtaining precious metal/precious metal oxide and silicon oxide composite powder, calcining obtained solid powder in a tube furnace to move under air or oxygen atmosphere, heating at 400-800 degrees C at heating rate of 1-5 min-1, calcining at 400-800 degrees C, roasting for 2-6 hours, obtaining precious metal oxide and silicon oxide composite, etching silicon oxide in hydrofluoric acid solution, removing silicon oxide composite and washing in a vacuum oven at 40-80 degrees C. The amount of deionized water is 0.3-3 wt.%. The reducing agent is sodium borohydride or potassium borohydride. The molarity of sodium borohydride or potassium borohydride is 0.1-4 M. The molar ratio of sodium borohydride or potassium borohydride is 0.5-0.02. The solid-liquid mass ratio of aminopropyl silica and tetraethyl orthosilicate is 0.05-0.4.