Fuel cell catalyst with high-density active sites and preparation method thereof

A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high cost, limited slow kinetics, insufficient catalyst performance and durability, etc., to accelerate oxygen reduction kinetics, improve interaction Force, cost reduction effect
CN113745554AInactive Publication Date: 2021-12-03NANJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF TECH
Publication Date
2021-12-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a fuel cell oxygen reduction catalyst with high-density active sites and a preparation method thereof, the catalyst is composed of specially designed high-density Fe-Nx-C and platinum nanoparticles loaded on the Fe-Nx-C, and the catalyst is characterized in that the high-density Fe-Nx active sites are not mutually agglomerated; however, the Fe-Nx-C substrate with a special structure has very good oxygen reduction activity, and a small amount of nano platinum particles loaded on the Fe-Nx-C substrate can fully exert the activity of the Fe-Nx-C substrate due to the synergistic effect of a carrier and metal instead of regional intensive active sites under the action of thermal coupling. According to the method, the problem of insufficient performance of a traditional carbon substrate is solved to a certain extent, the use amount of platinum is reduced, and the fuel cell oxygen reduction catalyst has a good prospect in practical application of the low-temperature hydrogen energy fuel cell.
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Description

technical field

[0001] The invention relates to a fuel cell oxygen reduction catalyst with highly dense active sites and a preparation method thereof, belonging to the technical field of fuel cell catalysts. Background technique

[0002] Among many new energy sources, a fuel cell is a device that directly converts chemical energy stored in fuels and oxidants into electrical energy. It has the advantages of high reliability, environmental friendliness, high energy density, and low noise, and has been researched all over the world. extensive research by researchers. Fuel cells can be divided into the following types according to the type of battery electrolyte: solid oxide fuel cell (SOFC), proton exchange membrane fuel cell (PEMFC), alkaline fuel cell (AFC), molten carbonate fuel cell (MCFC) and Phosphoric acid fuel cell (PAFC). Among them, the proton exchange membrane fuel cell has gradually become an ideal power source for large buses and submarines due to its advantages ...

Claims

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