Preparation of Fe-N-C mesoporous carbon material and application in oxidation-reduction reaction thereof

A mesoporous carbon, fuel cell technology, applied in electrical components, circuits, battery electrodes, etc., can solve the problems of limited fuel cell application, limited mass production, poor stability, etc., to achieve low hydrogen peroxide production, good methanol resistance Poisoning ability, effect of high current density

Active Publication Date: 2016-12-14
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high overpotential of the oxygen reduction reaction at the cathode severely limits its large-scale production.
[0003] Traditional noble metals such as Pt or Pd, as catalysts for fuel cell cathode oxygen reduction, have a small overpotential, but because of their high price and poor stability, they also limit the application of fuel cells to a certain extent.

Method used

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  • Preparation of Fe-N-C mesoporous carbon material and application in oxidation-reduction reaction thereof
  • Preparation of Fe-N-C mesoporous carbon material and application in oxidation-reduction reaction thereof
  • Preparation of Fe-N-C mesoporous carbon material and application in oxidation-reduction reaction thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Accurately weigh out 10g Tris, 1g CA, and 1g FeCl 3 , Grind and mix well to obtain a homogeneous yellow mixture. Then put the yellow mixture in a corundum boat (2*8*2cm) and put it in a blast drying oven (the temperature is set to 150℃, the maintenance time is 3 hours, and the air is not isolated) to obtain a yellowish-brown gel. Things.

[0033] 2) Put the yellow jelly in a tube furnace and heat it at high temperature (heating rate 2.5°C / min, heating temperature 850°C) and maintain it for two hours to obtain a dark brown jelly, which is a preliminary iron-nitrogen-carbon composite material. During the process of high-temperature heating and heating, the tube furnace is kept flowing with nitrogen.

[0034] 3) Put the composite material obtained in step 2) into 0.5 mol / L sulfuric acid for 12 hours, and stir with magnets at a stirring rate of 550 rpm / min. Filter and wash three times with twice distilled water, and dry for later use. According to the temperature of the h...

Embodiment 2

[0037] The experimental steps are the same as in Example 1, the difference is that in the experimental step 2), the heating temperature is 750°C to prepare Fe-NC-750. The characterization methods (SEM, TEM) are the same as those in Example 1. The electrochemical test method (CV, LSV) is also the same as in Example 1.

Embodiment 3

[0039] The experimental steps are the same as in Example 1, the difference is that in the experimental step 2), the heating temperature is 750°C to prepare Fe-NC-950. The characterization methods (SEM, TEM) are the same as those in Example 1. The electrochemical test method (CV, LSV) is also the same as in Example 1.

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PUM

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Abstract

The invention provides a preparation method for Fe-N-C mesoporous carbon material. The preparation method includes the following steps that tris(hydroxymethyl)aminomethane, a templating agent and an iron source are mixed and thoroughly milled so that the mixture is distributed and evenly mixed. Then the mixture is heated at a temperature of 100-200 DEG C, the product resulted from heating is left at a high temperature of 700-950 DEG C with heating, and the heating time is 2-4 hours; finally, the material obtained by the high temperature treatment is placed in H2SO4 solution for an acidification treatment, washed with deionized water several times, and dried. According to the preparation method, the highly efficient catalyst -Fe-N-C for oxidation-reduction is synthesized successfully by means of the inexpensive precursor. The appropriate temperature for high-temperature heating is determined through comparison and optimization of preparation process. The prepared catalyst has many advantages, such as high electron transfer number, low hydrogen peroxide production, great current density and good ability to resist methanol poisoning.

Description

Technical field [0001] The invention belongs to the field of catalysts, and specifically relates to a redox electrocatalytic material with a mesoporous structure. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy in the fuel and oxidizer into electrical energy. In recent years, with the continuous economic development, people's demand for fuel cells has increased day by day. Fuel cells are widely used in automobiles, space shuttles, submarines, underwater robots, communication systems, small and medium-sized power stations, household power supplies, and are characterized by high efficiency, no pollution, short construction period, easy maintenance and low cost. However, the high overpotential of the oxygen reduction reaction of the cathode severely limits its mass production. [0003] Traditional noble metals such as Pt or Pd, as a catalyst for oxygen reduction at the cathode of fuel cells, have a small overpotential...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M4/90
CPCH01M4/9083B01J27/24B01J35/33Y02E60/50
Inventor 林雨青何传生张亭亭孙凤展
Owner CAPITAL NORMAL UNIVERSITY
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