Schiff-based Pd(?)/Fe(?) Bimetallic Catalytic Monolayer-preparation,Structure,Catalytic Dynamic And Synergistic

In this paper,bimetallic synergy was used to prepare Schiff-base Pd/Fe bimetallic monolayer catalysts?defined as GO@H-Pd/Fe?supported by graphene oxide doped with non-noble iron and characterized by various detection methods.The catalytic properties,synergistic effect and catalytic mechanism of Suzuki-Miyaura were studied systematically.The specific research contents and results are as follows:1.Using GO as the carrier and Schiff-base as the ligand,an ordered Schiff-base bimetallic monolayer catalyst?GO@H-Pd/Fe?supported by GO was prepared by self-assembly method.The catalyst was characterized by Fourier transform infrared?FT-IR?,X-ray diffraction?XRD?,Raman spectroscopy?Raman?,X-ray photoelectron diffraction?XPS?,scanning electron microscopy-X-ray energy spectrum analysis?SEM-EDX?,transmission electron microscopy?TEM?,inductively coupled plasma?ICP-AES?,BET specific surface area test and electrochemical impedance?EIS?.2.The heterogeneous catalytic performance of GO@H-Pd_0.10Fe_0.90 was studied by using Suzuki-Miyaura reaction as the reaction template.The results showed that GO@H-Pd_0.10Fe_0.90 had high catalytic activity and good stability,and the catalyst could be used for 9 times.The deactivation mechanism indicated that it was caused by the loss and aggregation of metal active centers.3.Heterogeneous catalytic mechanism was explored by means of kinetic research,thermal filtration test,catalyst poisoning experiment,ReactIR,XPS and DFT characterization:a catalytic activity center similar to the atomic cluster with Pd0as the center was formed through bimetallic synergistic effect,effectively improving the catalytic activity.