Preparation And Catalytic Performance Of Phenolic Resin Carbonized Materials Loaded With Copper-based Nanoparticles

Non-precious metal catalysts have attracted more attention due to their low cost and high surface abundance,among which copper-based nanoparticle heterogeneous catalysts with unique properties and characteristics have been widely researched and developed and applied to many catalytic fields such as organocatalysis,electrocatalysis and photocatalysis in recent years.To solve the inherent problem that copper nanoparticles are prone to oxidative aggregation,the synthesis of copper-based nanoparticle catalysts with stable composite structures is a feasible strategy.At present,despite the gradual abundance of methods for the preparation of loaded copper-based nanoparticle catalysts,it is still a challenging problem to select suitable carrier materials,simplify the synthesis steps and reduce the production cost while ensuring the catalytic activity and stability of copper-based nanoparticle catalysts.Phenolic resin,as a common cross-linked polymer material,has the advantages of a simple synthesis route,high product yield and reproducibility,which can be used as an ideal carrier for the synthesis of loaded copper-based nanoparticle catalysts.In this paper,there are three chapters,the first chapter is an introduction,which mainly gives a brief introduction to the types,synthesis methods and catalytic applications of copper-based nanoparticle heterogeneous catalysts.In the chapter 2,a one-pot strategy for the synthesis of composites encapsulating copper nanoparticles by the impregnation followed by calcination method is proposed using phenolic resin as a carrier,followed by H₂O₂ washing to obtain copper-based nanoparticle core-shell heterogeneous catalysts.The resulting catalysts exhibited excellent catalytic activity and cyclic stability in the 4-nitrophenol hydrogenation reaction as well as the selective oxidation of benzyl alcohol.In the chapter 3,based on the research results in chapter 2,we used a similar one-pot strategy and H₂O₂ scrubbing treatment process to obtain a heterogeneous catalyst with uniform distribution of copper/palladium alloy nanoparticles,which effectively reduced the amount of palladium nanoparticle catalyst.The catalyst exhibited excellent stability and good catalytic activity in the reaction of selective dechlorination of 2,3,6-trichloropyridine for the preparation of 2,3-dichloropyridine.The performance of this catalyst in other multi-step conversion reactions will be further investigated in future work.