Synthesis Of UiO-Ir MOFs And Porphyrin COFs As Electrocatalysts Towards Water Oxidation

Porous materials has aroused much interest for its high BET surface area,which endows porous materials with capacity to absorb atoms,ions or molecules on the surface or within the pores,and to enhance the reaction efficiency.Metal organic frameworks?MOFs?and covalent organic frameworks?COFs?become hotspots for their unique advantages.MOFs are framework materials linked by coordination bonds which are bridges between metal ions and organic ligands.MOFs have high BET surface area,stable structure,controllable morphology and periodic pores,and have been applied in fields of photocatalysis or electrocatalysis.COFs are framework materials linked by covalent bonds which are bridges between organic monomers,and have been applied in fields of gas adsorption,organic catalysis,photo-or electrocatalysis.In this paper,we applied UiO-67 type MOFs to immobilize[Cp*IrCl??-Cl?]₂dimer within its frameworks by bipyridine ligand,and synthesized series of bpy-UiO-Ir MOFs.XRD,XPS,SEM,EDX tests showed[Cp*IrCl??-Cl?]₂ dimer was immobilized within the frameworks successfully,and it was stable enough to maintain its morphology.After checking its water oxidation electrocatalytic performances,it was tesitifed immobilization was benefited for its electrocatalytic performances,which were better than those of homogeneous ones.We also synthesized and purified 5,10,15,20-tetra?4-aminophenyl?porphyrin monomer by column chromatography and recrystallization.Then we synthesized TAPP-DHTA COFs under optimized conditions,including components and ratio of solvents,concentration of catalysts,etc.Finally we determined the best condition checked to synthesize TAPP-DHTA COFs with high crystallinity,high BET surface area and thermal stability:o-DCB/Butanol?v:v=9:1?or EtOH/o-DCB?v:v=1:1?with 3 mol·L^-1 HOAc as catalyst to react for 72 hours at 120?.