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A kind of pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst and its preparation method and application

A technology of pyridyl triazine and nitrogen-doped carbon, which is applied in the preparation/purification of carbon, electrochemical generators, fuel cells, etc., and can solve the problems of extremely slow oxygen reduction reaction, retardation, and large oxygen cathode overpotential , to achieve considerable ORR catalytic performance, methanol penetration resistance and stability

Active Publication Date: 2020-10-16
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the sluggishness of the cathode kinetics of the fuel cell itself and the large overpotential of the oxygen cathode, the oxygen reduction reaction (ORR) is extremely slow.

Method used

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  • A kind of pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst and its preparation method and application
  • A kind of pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst and its preparation method and application
  • A kind of pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst and its preparation method and application

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Embodiment approach

[0038] According to the first embodiment provided by the present invention, a pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst is provided.

[0039] A kind of pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst, which is prepared by the following preparation method: first carry out substitution reaction by 4-aminopyridine, 2,2'-dipyridylamine and cyanuric chloride , to prepare pyridyl triazine derivatives (DAPAT), and then use pyridyl triazine derivatives (DAPAT) as ligands to coordinate with metal cobalt ions to form a polymer network (Co-DAPAT), and then through high temperature pyrolysis Obtain pyridyltriazine derivative polymer-based nitrogen-doped carbon catalyst,

[0040] In the present invention, the metal cobalt ions are from metal cobalt salts.

[0041] Preferably, the metal cobalt salt is one or more of cobalt nitrate hexahydrate, cobalt basic carbonate, cobalt sulfate heptahydrate, cobalt chloride, cobalt bromide, and coba...

Embodiment 1

[0059] A preparation method of a pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst, the method comprising the following steps:

[0060] (1) Preparation of pyridyl triazine derivatives (DAPAT): Dissolve 4-aminopyridine, 2,2'-dipyridylamine and cyanuric chloride in an organic solvent, heat and react for a period of time, and separate to obtain pyridine Triazine derivatives (DAPAT);

[0061] (2) Preparation of pyridyl triazine derivative polymer (Co-DAPAT): dissolve pyridyl triazine derivative (DAPAT) in an organic solvent, add metal cobalt salt, heat for a period of time, and separate to obtain pyridine Polymer based triazine derivatives (Co-DAPAT);

[0062] (3) Preparation of nitrogen-doped carbon catalyst Co-DAPAT / C: the pyridyl triazine derivative polymer (Co-DAPAT) obtained in step (2) is subjected to high-temperature heat treatment, separated, and dried to obtain pyridyl triazine Derivative polymer-based nitrogen-doped carbon catalysts.

Embodiment 2

[0064] Preparation of pyridyl triazine derivatives (DAPAT):

[0065] Dissolve 0.9411g of 4-aminopyridine, 3.42g of 2,2'-dipyridylamine and 1.8441g of cyanuric chloride in 50mL of methanol, react in an oil bath at 80°C under reflux for 48h, cool to room temperature, separate and filter the precipitate, Wash several times with methanol and ethanol, and dry in vacuum to obtain pyridyl triazine derivative (DAPAT).

[0066] figure 1 A synthetic route for the preparation of the pyridyltriazine derivative DAPAT.

[0067] figure 2 For the preparation of pyridyltriazine derivatives DAPAT 1 H NMR chart.

[0068] image 3 For the prepared pyridyl triazine derivative DAPAT 13 C NMR image.

[0069] Figure 4 is the mass spectrum of the prepared pyridyl triazine derivative DAPAT.

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Abstract

The invention provides a pyridyl triazine derivative biopolymer N-doped carbon catalyst. A preparation method of the catalyst comprises the following steps: implementing a substitution reaction on 4-aminopyridine and 2,2'-bipyridine amine and cyanuric chloride to obtain a pyridyl-containing triazine derivative (DAPAT); coordinating the pyridyl-containing triazine derivative (DAPAT) as a ligand with metal cobalt ions to form a polymer network (Co-DAPAT); and pyrolyzing the polymer network (Co-DAPAT) at a high temperature to obtain the pyridyl triazine derivative biopolymer N-doped carbon catalyst. The catalyst has the advantages of simple preparation method, relatively low cost, considerable ORR catalyzing performance in alkaline media, methanol seepage resistance and stability, and is beneficial to the practical application of fuel cells.

Description

technical field [0001] The invention relates to an oxygen reduction catalyst, in particular to a pyridyl triazine derivative polymer-based nitrogen-doped carbon catalyst and its preparation method and application, belonging to the field of fuel cell science and technology. Background technique [0002] The widespread use of fossil energy, such as oil, natural gas and coal, has promoted the rapid development of human society, but the non-renewability of fossil energy and the environmental problems caused by the use of fossil energy are two major problems facing human beings. The development of environmentally friendly and renewable new energy sources and new energy technologies has become an important research hotspot in the world today. [0003] As a new type of clean green energy technology, fuel cells have the advantages of high energy conversion efficiency, good environmental affinity, high energy density, fast start-up speed, and no noise because they are not limited by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M8/1011C01B32/05
CPCC01B32/05H01M4/9091H01M8/1011Y02E60/50
Inventor 杨端光吕龙应阳梅黎华明陈红飙
Owner XIANGTAN UNIV