Preparation method of waxberry-shaped cobalt-nickel-boron composite carbon material proton membrane fuel cell catalyst

Abstract

The invention relates to a preparation method of a waxberry-shaped cobalt-nickel-boron composite carbon material proton membrane fuel cell catalyst. A nanomaterial active substance is a waxberry-shaped cobalt-nickel-boron composite carbon material called CoNi@TA / B for short. The problems of the existing fuel cell catalyst are solved, the defects of the prior art are overcome, the problems of single precursor obstacle and low synthesis cost of the existing fuel cell catalyst are generally faced, and the defects of high cost, toxicity and the like of a Pt-based catalytic material are overcome. On the basis of the unique structure of CoNi MOF, the metal organic framework nanocomposite material for the proton membrane fuel cell is developed, and the metal organic framework nanocomposite 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 as a proton membrane fuel cell catalyst of bayberry-shaped cobalt-nickel-boron composite carbon material, and relates to the preparation of CoNi@TA / B nanometer material by a thermal decomposition process and its application as an oxygen reduction catalyst material. Background technique [0002] In general, to ensure that electrocatalysts can work stably at high current densities, their active sites should have high surface area, high intrinsic activity, high tolerance, be easily accessible by reactants and at the same time conduct electrons to external circuits. Traditional MOFs-derived materials are mainly based on simple MOFs as a single precursor, so they mainly exhibit relatively simple configurations, and the catalysts prepared from them have poor ORR catalytic performance. [0003] To this end, the present invention provides a method to realize the synthesis of high-performance ORR catalyst in a controllable manner, by using...

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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 CoNi MOF, a metal-organic framework nanocomposite material for proton membrane fuel cells has been developed, which has high onset potential, half-slope potential, excellent limiting current, excellent stability and good Methanol tolerance, strong resistance to methanol poisoning, etc.

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