Preparation of supported NiPd bimetallic catalyst and application of supported NiPd bimetallic catalyst in oxidative coupling reaction

Abstract

The invention discloses preparation of a supported NiPd bimetallic catalyst and application of the supported NiPd bimetallic catalyst in oxidative coupling reaction, and relates to the technical field of bimetallic catalysts; the preparation method comprises the following steps: mixing a sodium chloropalladate solution and a nickel chloride solution, dissolving graphene oxide (GO) in deionized water, dropwise adding the solution into the mixed solution of the sodium chloropalladate solution and the nickel chloride solution; then adding Ni1Pd1@rGO into a reaction kettle, dropwise adding 1mL of a sodium borohydride solution, centrifuging to remove impurities after the reaction is ended, so as to obtain a supported bimetal Ni1Pd1@rGO catalyst; then weighing the catalyst, adding chlorobenzene, adding 2-phenylbenzothiazole, methylbenzene and N-hydroxyphthalimide, and extracting a reaction product by using ethyl acetate as an extracting agent after a reaction. The metal is loaded on the graphene oxide, so that the dispersity of the nanoparticles can be well improved, agglomeration of the nanoparticles in the catalysis process is reduced, the catalytic activity and catalytic efficiency of the nanoparticles are improved, the conversion rate of the catalyst is 83% after the catalyst is recycled for five times, and it is indicated that the catalyst has good catalytic activity and stability.

Description

technical field [0001] The invention relates to the technical field of bimetallic catalysts, in particular to the preparation of a supported NiPd bimetallic catalyst and its application in oxidative coupling reactions. Background technique [0002] Coupling reaction (English: Coupled Reaction), also known as coupling reaction, coupling reaction, oxidative coupling, is a process in which two organic chemical units (molecules) perform a certain chemical reaction to obtain an organic molecule. The chemical reactions here include the reaction of Grignard reagents with electrophiles, coupling reactions (Grinard), reactions of lithium reagents with electrophiles, electrophilic and nucleophilic reactions on aromatic rings (Diazo, Addition-Elimination), and the presence of sodium The Wurtz reaction, because the meaning of the coupling reaction (Coupled Reaction) is too broad, generally should be preceded by an attributive. And it's a relatively unprofessional term. Coupling reacti...

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