PT-M Metal Alloy Catalyst Prepared by Electrodeposition in Organic System

Abstract

The invention discloses a Pt-M metal alloy catalyst prepared by electrodeposition in an organic system; the conductive carrier of the catalyst is carbon-based; and the Pt-M metal alloy prepared by co-deposition of Pt-M metal in an organic solvent Alloy nanoparticles are uniformly dispersed on the surface of the carrier in the form of physical loading. During the preparation process, the Pt source precursor and the M source precursor are dissolved in an organic solvent, and the volume molar concentration of the metal precursor in the mixed solution is 1-20 mmol / L. In addition, the oxygen in the solution is excluded under the protection of an inert atmosphere, subsequent deposition is performed at different deposition potentials, and cyclic voltammetry electrochemical cleaning is performed. Through the scheme of the present invention, the further reduction of the platinum loading and the enhancement of the catalytic activity of the prepared Pt-M metal alloy nanoparticle catalyst can be achieved, the comprehensive utilization efficiency of precious metals is greatly improved, and the oxygen reduction activity is improved, reducing the Targets such as comprehensive cost of noble metal catalysts.

Description

Technical field[0001]The present invention relates to the field of nanomaterials, electrochemical techniques, and fuel cell catalysts, and more particularly to a PT-M metal alloy catalyst prepared by electrodeposition of an organic system and a preparation method thereof.Background technique[0002]Due to the high energy conversion efficiency, no environmental pollution, low noise, good reliability, etc., the fuel cell has evolved into a new potential new energy technology. However, large-scale applications in automobiles, distributed power generation and portable electronic fields still have many obstructions, in which the high cost of cathode catalyst is the most important challenge. Although non-platinum catalysts have great advantages in cost, their catalytic activity and stability are still equivalent to the platinum-based catalyst. As far as it is currently, the development of new low-platinum high performance catalysts is still the only way to realize the commercialization of p...

AI Technical Summary

Problems solved by technology

[0004] However, traditional chemical synthesis is limited by single synthesis methods and limited control methods for components and morphology, which greatly limits further breakthroughs in cathodic noble metal catalysts.

The electrochemical synthesis method overcomes the limitations of the above-mentioned traditional chemical synthesis method, and has extremely high advantages in controllability, and has been using electrochemical methods to prepare Pt-M alloys with controllable morphology in organic electrolyte systems. Catalyst research is rarely reported, and has considerable development prospects

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