Mesoporous platinum-palladium bimetallic nanoparticle and preparation method thereof

Abstract

The invention relates to a mesoporous platinum-palladium bimetallic nanoparticle and a preparation method thereof. The particle size of the mesoporous platinum-palladium bimetallic nanoparticle is 30-100nm, and the surface of the nanoparticle has a porous structure whose aperture is uniform, and the aperture is 2-3nm. The preparation method is as follows: (1) sodium tetrachloropalladate, chloroplatinic acid and a surfactant are dissolved in water, the materials are stirred uniformly at 30-90 DEG C, and a mixed solution containing bimetal is obtained; (2) a reducing agent solution is added into the mixed solution containing bimetal obtained in the step (1), a reaction is continued to carry out for 2-5 hours, an obtained reaction solution is centrifugal and separated, and the mesoporous platinum-palladium bimetallic nanoparticle is obtained by post-treatment. The invention provides a simple method for synthesis of the mesoporous precious metal nanoparticle with simple process and short synthesis period; the synthesized mesoporous precious metal nanoparticle is used as a catalyst for an industrial nitrobenzene hydrogenation reaction with very high activity.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a mesoporous platinum-palladium bimetallic nanoparticle and a preparation method thereof. Background technique [0002] Platinum nanoparticles have unique thermal, electrical, magnetic and optical properties, which make them have broad application prospects in energy, environmental protection, petrochemical, biomedicine and other fields. However, because platinum resources are limited and expensive, people need to increase the utilization rate of platinum in practical applications, thereby reducing its consumption. Generally, introducing another metal (such as gold, silver, palladium, copper, nickel, lead, etc.) 99.23%), so platinum and palladium are easy to form alloys and have excellent properties. [0003] In general, the catalytic performance of platinum-palladium nanoparticles depends on the active sites on the surface of the particles, and the atom...

AI Technical Summary

Problems solved by technology

However, at present, there are unavoidable problems in the synthesis of porous noble metal nanoparticles, such as complex synthesis methods, and the porous structure of the prepared noble metal nanoparticles is not uniform, which affects its in-depth application.

Images