Preparation method of monodisperse platinum-series high-entropy alloy nanoparticle catalyst

A high-entropy alloy and nanoparticle technology, which is applied in the field of material chemistry, can solve the problems of element distribution not reaching the chemical distribution of elements, high synthesis temperature, and uneven particle size of high-entropy alloys, and achieve low cost, uniform element distribution, and preparation The effect of simple method
CN111111693AActive Publication Date: 2020-05-08CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2020-05-08

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Abstract

The invention relates to the technical field of material chemistry, and particularly discloses a preparation method of a monodisperse platinum-series high-entropy alloy nanoparticle catalyst. The preparation method comprises the steps: preparing a silicon dioxide photonic crystal template, preparing a carbon precursor solution, and dissolving a platinum precursor and at least four other metal precursors in THF and CHCl3 to obtain a mixed solution; mixing a block copolymer F127, a carbon precursor solution and tetraethyl orthosilicate, respectively adding the mixture and a protonic acid solution into the mixed solution, and stirring to obtain a transparent solution; adding the transparent solution into the silicon dioxide photonic crystal template, drying, heating and curing to obtain a purple brown solid; calcining the purple brown solid to obtain a gray solid; and etching the gray solid by adopting strong base or strong acid, filtering and drying. The monodisperse platinum-series high-entropy alloy nanoparticle catalyst with the advantages of controllable particle size, good dispersity, excellent performance and the like is obtained by adopting the preparation method disclosed bythe invention.
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Description

technical field

[0001] The invention relates to the technical field of material chemistry, in particular to a method for preparing a monodisperse platinum-based high-entropy alloy nanoparticle catalyst. Background technique

[0002] Proton exchange membrane fuel cells (PEMFCs) have attracted extensive attention due to their high energy density and environmental friendliness. At present, the cost of fuel cells has been high in the application process. The reason is that the cathode oxygen reduction reaction (ORR) requires a large amount of Pt noble metal catalysts to accelerate the reaction process. Therefore, reducing the amount of Pt and improving the utilization of Pt is the solution to this problem. best solution to the problem. In order to achieve this goal, on the one hand, Pt is highly dispersed in the form of nano-scale particles on carbon supports to improve the utilization of Pt; on the other hand, replacing part of Pt with other metals (M) to prepare various Pt-ba...

Claims

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