The Catalyst Preparation Of Bimetallic Core-shell Structure And Its Application In Chemical Reaction

Supported Bimetallic catalyst due to its excellent catalytic activity and stability has attracted the researchers' widespread concern,especially the core-shell structure catalyst.Depending on the bimetallic synergy and coordination effect,it not only reduces the amount of noble metal,but also improves catalytic activity,making it having a promising application prospect in organic and inorganic reactions.We synthesize a novel catalyst Fe@Pd/C by sequential reduction method,exhibiting efficient catalytic activity in Suzuki coupling reaction in water.The catalyst is characterized by means of TEM?XRD?XPS?VSM measurements,showing that the catalyst is a heterogeneous catalyst having a high magnetic.Fe @ Pd/C catalyst for the reaction of iodobenzene and aryl halides with Phenylboronic acid performs high catalytic activity.Moreover,the catalyst could be recycled by external magneticfield and the yields achieved above 86%after reusing at least 5 times.According to the advantages of the core-shell structure catalyst,we design a graphene-based Ni @ Pd bimetallic catalyst by PVP templates and study its catalytic effect for hydrazine oxidation.Transmission electron microscope(TEM)images reveal that the Ni@Pd NPs with an average size of 4 nm are homogeneously dispersed on graphene oxide.The electrochemical measurements indicate that the Ni7Pd3/rGO hybrid with a Ni:Pd mass ratio of 7:3 exhibits the highest electrocatalytic activity toward hydrazine oxidation.In the meanwhile,Chronoamperometric measurement shows that the catalyst has outstanding catalytic life.All results demonstrate that the Ni7@Pd3/rGO is desired candidate in the development of the hydrazine fuel cells catalyst.