The Preparation And Performance Study Of PdCu Alloy And PtCu Alloy

The alloy catalyst formed by Pt and Pd with various transition metals,have a good catalytic activity,for methanol,ethanol,formic acid and other small molecules of electrochemical oxidation.So,Pt-based and Pd-based alloy catalyst have also been a great concern.Currently,the catalyst used in commercialization is mainly Pt-based catalyst,the price is relatively expensive,resulting in high cost of fuel cells,and fuel cell life is also unsatisfactory.In this study,the alloy nanowire network structure were prepared by using Helicoverpa armigera polyhedrin as a protective agent / conditioner / primer;the heterostructure nanocrystals with alloy structure were prepared by using diamond-like nano-Cu O as seed.Meanwhile,a series of characterization analyzes were performed on the obtained samples.In addition,the catalytic activity and stability of the synthesized nanomaterials in methanol and ethanol oxidation were tested,the details are summarized as follows:1.The synthesis of platinum-copper and palladium-copper alloy nanomaterials by polyhedrin and their characterization.The synthesis of platinum-copper and palladium-copper alloy nanomaterials by diamond-like nanometer copper oxide and their characterization.2.For the obtained platinum-copper nanomaterials,the electrocatalytic activity of methanol and ethanol was investigated by cyclic voltammetry under the acidic conditions.The stability of the catalytic activity was investigated by using the time current curve.All the results were compared with the commercial Pt/C.In both catalytic reactions,the prepared platinum-copper nanomaterials have higher electrochemical specific surface area,higher oxidation current density,slower decay rate and higher residual current density than commercial Pt/C.It can be proved that the platinum-copper nanomaterials have higher electrocatalytic activity.3.For the obtained palladium-copper nanomaterial samples,the electrocatalytic activity of methanol and ethanol was investigated by cyclic voltammetry under alkaline conditions.The stability of the catalytic activity was investigated by using the time current curve.The results were compared with Commercial Pd/C for comparison.In both catalytic reactions,the prepared palladium-copper nanomaterials have higher electrochemical specific surface area,higher oxidation current density,slower decay rate and higher residual current density than commercial Pd/C.This proves that palladium-copper nanomaterials have higher electrocatalytic activity.