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Preparation method and application of transition metal and its compound-anchored nitrogen-doped carbon catalyst

A transition metal and carbon catalyst technology, applied to structural parts, electrical components, battery electrodes, etc., can solve the problems of complicated procedures, waste of metal ligands, and metal particle agglomeration, and achieve simple production methods, good stability, and high activity. Effect

Active Publication Date: 2022-07-22
徐州海添新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a transition metal and its compound-anchored N-doped carbon catalyst preparation method, which solves the problem of complex procedures for preparing M-N-C catalysts in the prior art, waste of a large amount of metal ligands, and metal particles agglomeration at the same time

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  • Preparation method and application of transition metal and its compound-anchored nitrogen-doped carbon catalyst
  • Preparation method and application of transition metal and its compound-anchored nitrogen-doped carbon catalyst
  • Preparation method and application of transition metal and its compound-anchored nitrogen-doped carbon catalyst

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Embodiment 1

[0046] The present embodiment prepares a transition metal Cu-anchored N-doped carbon catalyst, which is specifically implemented according to the following steps:

[0047] Step 1. Place the treated corn stalk and dicyandiamide on both ends of the porcelain boat. The mass ratio of corn stalk and dicyandiamide was 1:2. The porcelain boat was placed in a tube furnace, the heating rate was 5°C / min, the temperature was 800°C, and the holding time was 1.5h. During the heating process, dicyandiamide is decomposed into CN x The active material reacts with biomass carbon, and the obtained product is N-doped biomass carbon.

[0048] Step 2, under stirring, mix the copper nitrate and the N-doped biomass carbon in a ratio of 0.1:1, the solvent is water and ethanol, the volume ratio of water and ethanol is 1:1, and the mixed solution is obtained by ultrasonicating for 3 hours. , the mixed solution was subjected to rotary evaporation and dried in an oven at 80°C to obtain the precursor o...

Embodiment 2

[0053] The present embodiment prepares a transition metal Ni-anchored N-doped carbon catalyst, which is specifically implemented according to the following steps:

[0054] Step 1. The treated corn stalk and dicyandiamide are placed on both ends of the porcelain boat respectively, the mass ratio of corn stalk and dicyandiamide is 1:5, the porcelain boat is placed in a tube furnace, the heating rate is 5°C / min, and the temperature 8 ℃, the holding time is 2h. During the heating process, dicyandiamide is decomposed into CN x The active material reacts with biomass carbon, and the obtained product is N-doped biomass carbon.

[0055] Step 2. Under stirring, mix nickel nitrate and N-doped biomass carbon in a ratio of 0.05:1, the solvent is water and ethanol, the volume ratio of water and ethanol is 1:1, and the mixture is obtained by ultrasonicating for 4 hours. , the mixed solution was subjected to rotary evaporation and dried in an oven at 80° C. to obtain the precursor of N-dop...

Embodiment 3

[0060] The present embodiment prepares a transition metal compound FeN-anchored N-doped carbon catalyst, which is specifically implemented according to the following steps:

[0061] Step 1. The treated corn stalk and dicyandiamide are placed on both ends of the porcelain boat respectively, the mass ratio of corn stalk and dicyandiamide is 1:6, the porcelain boat is placed in a tube furnace, the heating rate is 5°C / min, and the temperature 700 ℃, the holding time is 2h. During the heating process, dicyandiamide is decomposed into CN x The active material reacts with biomass carbon, and the obtained product is N-doped biomass carbon.

[0062] Step 2. Under stirring, mix according to the mass ratio of ferric nitrate and N-doped biomass carbon to 0.2:1, the solvent is water and ethanol, the volume ratio of water and ethanol is 1:1, and the first mixing is obtained by ultrasonic for 2h. The first mixed solution was subjected to rotary evaporation, and then dried in an oven at 80°...

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Abstract

The invention discloses a method for preparing a transition metal and its compound-anchored N-doped carbon catalyst, which is specifically implemented according to the following steps: step 1, preparing an N-doped carbon material; step 2, using impregnation and rotary evaporation to prepare an N-doped carbon precursor ; Step 3, heat treatment of the N-doped carbon precursor prepared in step 2 at high temperature to obtain the N-doped carbon catalyst, the invention has simple process, convenient operation and low cost, and solves the problem of preparing the M-N-C catalyst in the prior art. The process is complicated, wastes a lot of metal ligands, and the metal particles will have the problem of agglomeration, which is convenient for large-scale production.

Description

technical field [0001] The invention belongs to the field of catalyst preparation technology, in particular to a method for preparing a transition metal and its compound-anchored N-doped carbon catalyst, and also to the application of the above catalyst. Background technique [0002] With the increasingly serious problems of energy consumption and environmental pollution, it is necessary to develop new energy storage and conversion devices. Metal-air batteries, especially zinc-air batteries, are hailed as the most promising batteries due to their low price, environmental friendliness, and theoretical energy density as high as 1084Wh kg -1 . Oxygen reduction (ORR) process is an important process in fuel cells and metal-air battery technology. However, because ORR is a kinetically sluggish 4e process, it leads to the low efficiency of general catalysts in catalyzing this reaction. , which severely limits its practical application. Precious metals (Pt, Ir, RuO 2 , etc.) are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88H01M12/06
CPCH01M4/9041H01M4/9016H01M4/9083H01M4/88H01M12/06
Inventor 刁金香张超焦旭东孙超陈慧徐胜利
Owner 徐州海添新材料有限公司
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