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

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...

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.

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