▎ 摘　　要

NOVELTY - Preparation of high-platinum content high-performance catalyst involves (1) pretreating carbon black carrier, (2) dissolving titanium precursor and silicon precursor in an ethanol solution containing a small amount of glacial acetic acid, adding the pretreated carbon black carrier, evaporating the solvent, obtaining a carbon black carrier coated and modified with a binary oxide of silicon oxide and titanium oxide, placing in a tube furnace, nitriding treatment, converting oxides into nitrides, cooling to room temperature, obtaining carbon black carrier modified with titanium silicon nitride, (3) mixing noble metal precursor, complexing agent, reducing agent, and solvent, adding the carbon black carrier modified with titanium silicon nitride, performing microwave organosol reduction reaction, (4) cooling the reaction system completed in step (3) to room temperature, using acidic solution to adjust the pH to acidity, obtaining catalyst sample, (5) post-treating. USE - Preparation of high-platinum content high-performance catalyst (claimed). ADVANTAGE - The method is simple, rapid, economical and suitable for large-scale industrial production. The catalyst has high active component content, small granularity, excellent dispersibility, excellent stability, anti-reverse performance and low iridium content. DETAILED DESCRIPTION - Preparation of high-platinum content high-performance catalyst involves using carbon black treated with titanium silicon nitride as a catalyst carrier, and adding a small amount of iridium to the active component to improve the stability and durability of the catalyst with ability to resist poles. The rapid and efficient preparation is achieved by the microwave sol method involves (1) pretreating carbon black carrier, dispersing the carbon black carrier in an organic solvent and stirring to remove the oil, washing and drying, heating and stirring, refluxing in a strong oxidizing solution for 8-12 hours, washing with deionized water and drying at 70-110 degrees C to obtain pretreated carbon carrier, (2) dissolving titanium precursor and silicon precursor in an ethanol solution containing a small amount of glacial acetic acid, adding the pretreated carbon black carrier, evaporating the solvent in a 70 degrees C water bath, drying at 70-110 degrees C, obtaining a carbon black carrier coated and modified with a binary oxide of silicon oxide and titanium oxide, placing in a tube furnace, nitriding treatment, converting oxides into nitrides, cooling to room temperature, obtaining carbon black carrier modified with titanium silicon nitride, (3) mixing noble metal precursor, complexing agent, reducing agent, and solvent, obtaining a uniformly mixed solution containing the precursor, adding the carbon black carrier modified with titanium silicon nitride, stirring to obtain a uniform dispersion system, adjusting its pH to alkaline with alkaline solution, placing in a microwave reactor, performing microwave organosol reduction reaction, (4) cooling the reaction system completed in step (3) to room temperature, using acidic solution to adjust the pH to acidity, ultrasonic gel breaking, performing suction filtration, washing and drying, obtaining catalyst sample, (5) placing the catalyst prepared in step (4) in a tube furnace, and passing hydrogen, a mixture of hydrogen and nitrogen or nitrogen for high-temperature post-treatment. The content of active components in the catalyst can be 60 wt.% or more.