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Iron-nitrogen-carbon catalyst as well as preparation method and application thereof

An iron-nitrogen-carbon catalyst and catalyst technology, which can be applied to structural parts, electrical components, battery electrodes, etc., can solve the problems of poor electrocatalytic performance of iron-nitrogen-carbon catalysts, and achieve good oxygen reduction catalytic performance and stable physicochemical structure.

Pending Publication Date: 2022-06-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present disclosure is to solve the problem of poor electrocatalytic performance of iron-nitrogen-carbon catalysts prepared by existing methods, and to provide an iron-nitrogen-carbon catalyst and its preparation method and use

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  • Iron-nitrogen-carbon catalyst as well as preparation method and application thereof
  • Iron-nitrogen-carbon catalyst as well as preparation method and application thereof
  • Iron-nitrogen-carbon catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0043]In order to overcome the above-mentioned problems existing in the preparation methods of the existing iron-nitrogen-carbon catalysts, a second aspect of the present disclosure provides a method for preparing the iron-nitrogen-carbon catalysts described in any one of the embodiments of the present disclosure, the method comprising: a, Mixing naphthalene with a nitrogen source and carrying out a polymerization reaction under the action of anhydrous ferric chloride to obtain a nitrogen-containing naphthalene pitch precursor, wherein the nitrogen source is an aromatic compound containing a nitrogen heterocycle; b. The nitrogen-naphthalene pitch precursor is subjected to high-temperature carbonization treatment under an inert gas atmosphere to obtain an intermediate; c. the intermediate is acid-washed to obtain an iron-nitrogen-carbon catalyst, wherein the acid used may include hydrochloric acid during the acid-washing , at least one of sulfuric acid and nitric acid, and the a...

Embodiment 1

[0053] This example is used to illustrate the iron-nitrogen-carbon catalyst of the present disclosure and its preparation method, and the preparation method includes the following steps:

[0054] (1) 10g naphthalene, nitrogen source (5g indole, 1g carbazole) and 4.5g anhydrous ferric chloride are placed in the reactor, and under nitrogen protection, react at 80° C. for 3 hours to obtain nitrogen-containing naphthalene pitch precursor body;

[0055] (2) Take 5 g of the nitrogen-containing naphthalene pitch precursor obtained in step (1) and place it in a tube furnace, and heat it up to 950° C. under a nitrogen atmosphere with a flow rate of 200 mL / min, and the heating rate is 5° C. / min; , at a constant temperature for 2 hours; after the constant temperature treatment, the temperature was lowered to room temperature under nitrogen protection, and the cooling rate was 5 °C / min; after the cooling, the calcined product was taken out to obtain an intermediate;

[0056] (3) grinding...

Embodiment 2

[0065] A preparation method of an iron-nitrogen-carbon catalyst, comprising the following steps:

[0066] (1) 10g of naphthalene, nitrogen source (3g of pyrrole, 4g of carbazole) and 2.5g of anhydrous ferric chloride were placed in a reactor, and under nitrogen protection, reacted at 80° C. for 3 hours to obtain a nitrogen-containing naphthalene pitch precursor ;

[0067] (2) Take 5 g of the nitrogen-containing naphthalene pitch precursor obtained in step (1) and place it in a tube furnace, and heat it up to 900° C. under a nitrogen atmosphere with a flow rate of 100 mL / min, and the heating rate is 5° C. / min; , at a constant temperature for 2 hours; after the constant temperature treatment, the temperature was lowered to room temperature under nitrogen protection, and the cooling rate was 5 °C / min; after the cooling, the calcined product was taken out to obtain an intermediate;

[0068] (3) grinding the intermediate obtained in step (2), adding 150mL 2mol / L hydrochloric acid ...

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Abstract

The invention relates to an iron-nitrogen-carbon catalyst and a preparation method and application thereof.The catalyst comprises iron atoms and a nitrogen-doped carbon matrix, the nitrogen-doped carbon matrix is of a graphitized structure, and the iron atoms are inlaid in the nitrogen-doped carbon matrix in the mode that the iron atoms and nitrogen atoms form ligands; wherein on the basis of the iron-nitrogen-carbon catalyst, the content of the iron atoms is 0.001 to 1 weight percent, the content of the nitrogen atoms is 2 to 10 weight percent, and the content of the carbon is 50 to 90 weight percent. The iron-nitrogen-carbon catalyst provided by the invention comprises the nitrogen-doped carbon matrix with a graphitized structure and the iron monatomic embedded in the nitrogen-doped carbon matrix in a manner of forming a ligand with nitrogen atoms, and the iron monatomic is high in content and uniform in dispersion, so that the physical and chemical structure of the iron-nitrogen-carbon catalyst is stable, and the iron-nitrogen-carbon catalyst can be used for preparing a high-purity iron-nitrogen-carbon catalyst. The catalyst has good oxygen reduction catalytic performance and can be used as a cathode catalyst of a fuel cell.

Description

technical field [0001] The present disclosure relates to the technical field of single-atom catalysts, and in particular, to an iron-nitrogen-carbon catalyst and a preparation method and application thereof. Background technique [0002] Iron-nitrogen-carbon (Fe-N-C) catalyst is a new type of carbon-based nanomaterial, which integrates the advantages of homogeneous catalysis and heterogeneous catalysis, with high catalytic activity and high selectivity, and large utilization of metal atoms. It has achieved good application prospects in the fields of oxidation reaction, hydrogenation reaction, photocatalytic hydrogen production and electrocatalysis. Iron-nitrogen-carbon catalysts can replace noble metal catalysts to a certain extent, so they can significantly reduce the cost of noble metal catalysts. [0003] The iron-nitrogen-carbon catalyst in the related art is usually obtained by calcining a precursor containing an iron source, a nitrogen source and a carbon source at a ...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9041H01M4/9083
Inventor 吴玉超彭茜顾贤睿王厚朋
Owner CHINA PETROLEUM & CHEM CORP
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