Preparation method of metal organic framework loaded Pt-base catalyst

Abstract

The invention discloses a preparation method of a metal organic framework loaded Pt-base catalyst. The method comprises putting the metal organic framework into an alcoholic solution, vibrating with ultrasonic, adding drop by drop a mixed solution of chloroplatinic acid and cobalt oxide, adding NaOH, stirring, putting into a microwave oven for intermittent heating, cooling, filtering by pumping, and drying under vacuum to obtain the metal organic framework loaded Pt-base catalyst. The catalyst is small in particle, not easy to agglomerate, good in dispersibility and high in electrochemical catalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a Pt catalyst supported by a metal organic framework. Background technique [0002] Oxygen reduction catalysts commonly used in fuel cells and lithium-air batteries are carbon-supported Pt-based catalysts. However, due to the shortage of Pt resources and high prices, appropriate preparation methods and process conditions must be adopted to improve the dispersion of Pt and reduce the particle size of Pt. , reduce the load of Pt in the catalyst, and reduce the cost of the catalyst. At present, there are many methods for preparing unit and multi-component catalysts, such as impregnation-liquid phase reduction method: after dissolving the precursor of Pt, mixing with activated carbon carrier, and then adding a reducing agent, such as NaBH 4 , formaldehyde solution, sodium citrate, sodium formate, hydrazine, etc., to reduce Pt, deposit it on activated carbon, and obtain a Pt / C catalyst after drying. The adv...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the method is simple, and the disadvantage is that the prepared catalyst has poor dispersion and large average particle size.