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Spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and preparation method thereof

A non-precious metal, nitrogen-doped carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve unfavorable catalyst industrialization, difficult control of preparation process conditions, and complex catalyst preparation methods and other problems to achieve the effect of avoiding the loss of positive electrode potential, low price and improving service life

Inactive Publication Date: 2011-11-23
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the above-mentioned catalyst preparation methods are relatively complicated, consume a lot of manpower and material resources, and the process conditions of the preparation process are not easy to control, which is not conducive to the industrialization of catalysts.

Method used

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  • Spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and preparation method thereof
  • Spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and preparation method thereof
  • Spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Mix 40 parts by weight of melamine-formaldehyde resin prepolymer with a solid content of 60% and a pH value of 7 to 9, and 10 parts by weight of pure water, and stir for 10 minutes to mix evenly;

[0036](2) Add 2 parts by weight of cobalt nitrate to the uniformly mixed melamine-formaldehyde resin prepolymer, and stir for 60 min to completely dissolve cobalt nitrate in the melamine-formaldehyde resin prepolymer;

[0037] (3) Add glacial acetic acid to the melamine-formaldehyde resin prepolymer dissolved in cobalt nitrate, adjust the pH value to 1.5, and let it stand for 10 minutes. After it is completely solidified, dry it under reduced pressure and vacuum for 3 hours at 30 °C to obtain a block Melamine formaldehyde xerogel containing cobalt nitrate;

[0038] (4) The massive cobalt nitrate-containing melamine-formaldehyde xerogel was heat-treated at 700°C for 1 h under the protection of Ar, cooled, ground into powder, and sieved with 300 mesh to obtain a spherical n...

Embodiment 2

[0041] (1) Mix melamine-formaldehyde resin prepolymer with a solid content of 60% in parts by weight of 40 parts and a pH value of 7 to 9 with purified water in parts by weight of 5 parts, and stir for 10 minutes to mix evenly;

[0042] (2) Add 2 parts by weight of cobalt acetate to the uniformly mixed melamine-formaldehyde resin prepolymer, and stir for 30 minutes to completely dissolve cobalt acetate in the melamine-formaldehyde resin prepolymer;

[0043] (3) Add 10% hydrochloric acid into the melamine-formaldehyde resin prepolymer dissolved with cobalt acetate, adjust the pH value to 2.0, let it stand for 30 minutes, and dry it under reduced pressure and vacuum for 3 hours at 30 °C after it is completely cured. Obtain block melamine formaldehyde xerogel containing cobalt acetate;

[0044] (4) The massive cobalt acetate-containing melamine formaldehyde xerogel was heat-treated at 750 °C for 1.0 h under the protection of Ar, cooled, ground into powder, and sieved with 300 mes...

Embodiment 3

[0047] (1) Mix 50 parts by weight of melamine-formaldehyde resin prepolymer with a solid content of 60% and a pH value of 7 to 9 with 10 parts of pure water and stir for 10 minutes to mix evenly;

[0048] (2) Add 5 parts by weight of iron acetate to the uniformly mixed melamine-formaldehyde resin prepolymer, and stir for 30 minutes to completely dissolve the iron acetate in the melamine-formaldehyde resin prepolymer;

[0049] (3) Add 15% nitric acid dropwise to the melamine-formaldehyde resin prepolymer dissolved in iron acetate, adjust the pH value to 3.0, let it stand for 5 h, and dry it under reduced pressure and vacuum for 3 h at 30 °C after it is completely cured , obtain blocky melamine formaldehyde xerogel containing iron acetate;

[0050] (4) The bulk melamine formaldehyde xerogel containing iron acetate was placed in N 2 Heat treatment at 700°C for 2 h under protection, grinding into powder after cooling, and sieving with 300 meshes to obtain a spherical nitrogen-dop...

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Abstract

The invention discloses a spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and a preparation method thereof, and aims to provide a nitrogen-doped non-noble metal oxygen reduction catalyst which has the advantages of simplicity, convenience, practicability, low cost and stable performance and a preparation method thereof. The technical key points are as follows: the catalyst comprises the following components: melamine formaldehyde resin prepolymer, non-noble metal salt and acid. The preparation method of the catalyst comprises the following steps of: (1) uniformly mixing the melamine formaldehyde resin prepolymer with pure water; (2) adding the non-noble metal salt and stirring; (3) adding the acid into the solution obtained by the step (2), curing and drying to obtain blocks; and (4) performing thermal treatment to obtain the spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst. The invention belongs to the technical field of fuel cell material science.

Description

technical field [0001] The invention relates to an oxygen reduction catalyst and a preparation method thereof, in particular to a spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and a preparation method thereof, belonging to the field of fuel cell material science and technology. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the advantages of high energy density and environmental friendliness, and is considered to be one of the main alternative energy sources for future vehicles, distributed power stations and portable electronic products. Since the cathode of PEMFC is an oxygen electrode, the process of oxygen electrode has little reversibility and the reduction is difficult, so a large amount of noble metal platinum (Pt) catalyst must be used, resulting in high battery cost, which seriously hinders the commercialization of PEMFC. Especially in the direct methanol fuel cell (DMFC), methanol permeation leads ...

Claims

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Application Information

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IPC IPC(8): B01J27/00B01J35/08H01M4/90
CPCY02E60/50
Inventor 陈胜洲杨伟李良伟
Owner GUANGZHOU UNIVERSITY
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