Direct Hybridization of Pd on Metal–Organic Framework (MOF)@PAN(C) to Catalyze Suzuki Reaction

Abstract

The C–C bond constructed by Suzuki cross-coupling reaction is very important in the fields of medicine, chemical industry, etc. Here we support palladium on the surface of MOF@ partially carbonized PAN written as PAN(C) by solvothermal method to reduce the agglomeration of palladium and increase the catalytic performance of palladium. The physicalchemical properties of as-prepared catalysts were characterized using field emission scanning electron microscopy, transmission electron microscope (TEM), X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), Raman spectra, Fourier-transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and Temperature programmed reduction (H2-TPR). The catalyst is used in the Suzuki reaction, the yield is close to 100% and no significant reductions in performance after six reactions. It was found that there were synergistic effect and heterostructures between Ni-MOF and supported Pd, especially, the Pd and the carrier have a strong acting force, which ensures that the catalyst is used multiple times. A catalyst for hybridizing palladium on a composite support combining MOF and carbon fiber, Pd1-Ni4-MOF@CNFs are prepared via electrospinning technology followed by carbonization and a solvothermal process. They can be directly served as catalyst for Suzuki reaction. Most importantly, due to the synergistic effect and the influence of the heterostructure, the reaction yield was close to 100%, and the performance did not decrease significantly after six reactions.