Noble Metal Nanoparticles Supported On Porous Organic Polymers As Highly Efficient Catalysts For Catalytic Applications

It is well known that noble metal nanoparticles(NMNPs)have excellent catalytic performance in organic transformations.However,as ultrafine NMNPs have high surface energy and serious agglomeration tendency,it often shows poor reusability and stability in the catalytic process.Therefore,it is necessary to study the preparation of loading materials with excellent properties to prevent the aggregation and loss of NMNPs.In recent years,porous organic polymers(POPs)with high specific surface area and high porosity have attracted much attention of researchers.As a new class of functional porous materials,functionalized heteroatomic ligands in POPs channels can be used to anchor NMNPs,thus effectively preventing the agglomeration and loss of NMNPs,and providing broad research and development space for the development of new and efficient heterogeneous catalysts.According to the above research background,and based on the long-short organic polymer materials special porous skeleton structure characteristics and abundant heteroatomic groups,this paper adopts the relatively cheap precursor materials to construct two kinds of organic polymer materials(PC-POP and COFs)and load respectively different ultrafine metal nanoparticles(Pd@PC-POP and Pt/COFs).And a series of physical and chemical characterizations of the catalyst system were studied in detail.In this study,Pd@PC-POP was applied to the catalytic reduction reaction of 4-nitrophenol(4-NP).The Pt/COFs was applied to the catalytic hydrolysis of ammonoborane(AB)and the catalytic reduction of halonitrobenzene.The catalytic properties of Pd@PC-POP and Pt/COFs were investigated in detail.At the same time,compared with other noble metal supported catalysts,the results show that the POPs supported NMNPs catalysts have higher catalytic activity and better stability.The research results of this paper confirm that porous organic polymer materials can load NMNPs with high dispersion and can effectively prevent the agglomeration and loss of NMNPs.Such kind of catalysts have potential catalytic applications in the field of multiphase catalysis.