Preparation method of plant polyphenol modified manganese-based nano composite electrocatalyst with supramolecular network framework structure

Abstract

The invention relates to a preparation method of a plant polyphenol modified manganese-based nano composite electrocatalyst with a supramolecular network framework structure. The active substance of the nano material is ZIF-8@ TA-Mn. The problems of the existing fuel cell catalyst are solved, and the defects of the prior art are overcome. The fuel cell catalyst at present generally faces the problems of single precursor obstacle and low synthesis cost and the defects of high cost, toxicity and the like of a Pt-based catalytic material. On the basis of the unique structure of ZIF-8, the metal organic framework nano composite material for the proton membrane fuel cell is developed, and the metal organic framework nano composite material has the advantages of being high in initial potential and half-slope potential, excellent in limiting current, excellent in stability, good in methanol tolerance, high in methanol poisoning resistance and the like.

Description

technical field [0001] The invention is used for nano-scale manganese-based oxide proton membrane fuel cell catalyst, and relates to the preparation of ZIF-8@TA-Mn nanomaterial by a thermal decomposition process and its application as an oxygen reduction catalyst material. Background technique [0002] Proton Membrane Fuel Cell (PEMFC) has the characteristics of high specific energy, quick start at low temperature, convenient operation, high smooth operation and green environmental protection. It is considered as an ideal power source to replace internal combustion engines and is used in national defense, aerospace, communication, New energy vehicles and other aspects have attracted the attention of a wide range of scholars. At present, PEMFC still faces problems such as high cost and short life, which makes it impossible to achieve wide application, which limits the further development of PEMFC in the process of industrialization. In order to improve the performance of PEM...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing fuel cell catalysts and overcome the defects of the prior art. At present, fuel cell catalysts generally face the single obstacle of the precursor and the problem of synthesis cost, as well as the high cost and toxicity of Pt-based catalytic materials, etc. Defects; Based on the unique structure of ZIF-8, a metal-organic framework nanocomposite for proton membrane fuel cells has been developed, which has high onset potential, half-slope potential, excellent limiting current, excellent stability and very good Methanol tolerance, strong resistance to methanol poisoning and other advantages

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