Oxygen reduction non-noble metal catalyst and preparation method thereof

A non-precious metal, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of lack of resources and high cost of Pt/C catalysts, achieve high graphitization degree, excellent oxygen Reduction catalytic performance, the effect of excellent oxygen reduction catalytic activity

Inactive Publication Date: 2012-08-08
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an oxygen-reducing non-precious metal catalyst and its preparation method for the disadvantages of the existing fuel cell Pt / C catalysts, which are high in cost and lack of resources.

Method used

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  • Oxygen reduction non-noble metal catalyst and preparation method thereof
  • Oxygen reduction non-noble metal catalyst and preparation method thereof
  • Oxygen reduction non-noble metal catalyst and preparation method thereof

Examples

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Embodiment 1

[0032] An oxygen-reducing non-noble metal catalyst and a preparation method thereof, the specific method steps comprising:

[0033] (1) Preparation of montmorillonite suspension for aniline intercalation

[0034] Weigh montmorillonite and aniline according to the mass ratio of montmorillonite: aniline of 1:1, first disperse montmorillonite in deionized water, and ultrasonically stir for 5 hours to form a montmorillonite suspension with a mass concentration of 0.05 g / ml Measure ethanol by montmorillonite suspension: the volume ratio of ethanol is 1: 0.5, dissolve aniline in ethanol, and join in the above-mentioned montmorillonite suspension, stir 30 hours at 20 ℃, form the montmorillonite intercalation of aniline Desoil suspension.

[0035] (2) Interlayer polymerization of aniline

[0036]The montmorillonite suspension of the aniline intercalation obtained by step (1): the volume ratio of sulfuric acid solution 1: 0.3 measures sulfuric acid solution, wherein the concentration...

Embodiment 2

[0045] An oxygen-reducing non-noble metal catalyst and a preparation method thereof, the specific method steps comprising:

[0046] (1) Preparation of kaolin suspension for pyrrole intercalation

[0047] It is 1: 4 to weigh kaolin and pyrrole by kaolin: the mass ratio of pyrrole, first kaolin is dispersed in deionized water, and ultrasonic stirring 8 hours forms the kaolin suspension that mass concentration is 0.1 g / ml; Press kaolin suspension: acetone Acetone was measured at a volume ratio of 1:1, pyrrole was dissolved in acetone, and added to the above kaolin suspension, stirred at 60°C for 10 hours to form a pyrrole-intercalated kaolin suspension.

[0048] (2) Interlayer polymerization of pyrrole

[0049] The kaolin suspension of pyrrole intercalation obtained by step (1): the volume ratio of hydrochloric acid solution 1: 0.5 measures hydrochloric acid solution, wherein the concentration of hydrochloric acid solution is 0.5 mole / liter; by pyrrole: the mass ratio of hydroge...

Embodiment 3

[0055] An oxygen-reducing non-noble metal catalyst and a preparation method thereof, the specific method steps comprising:

[0056] (1) Preparation of hydrotalcite suspension for aniline intercalation

[0057] Weigh hydrotalcite and aniline according to the mass ratio of hydrotalcite: aniline of 1:0.1, first disperse the hydrotalcite in deionized water, and stir ultrasonically for 3 hours to form a hydrotalcite suspension with a mass concentration of 0.01 g / ml; The volume ratio of liquid: acetonitrile is 1:0.3. Measure acetonitrile, dissolve aniline in acetonitrile, and add it to the above hydrotalcite suspension, stir at 10°C for 40 hours to form an aniline-intercalated hydrotalcite suspension.

[0058] (2) Interlayer polymerization of aniline

[0059] The hydrotalcite suspension of the aniline intercalation obtained by step (1): the volume ratio of sulfuric acid solution 1: 0.1 measures sulfuric acid solution, wherein the concentration of sulfuric acid solution is 1.5 mol / l...

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Abstract

The invention which provides an oxygen reduction non-noble metal catalyst and a preparation method thereof belongs to the technical field of fuel cells. The nitrogen doped non-noble metal fuel cell catalyst having a graphite-like structure is formed by introducing nitrogen-containing monomers into layered inorganic compound interlayers and carrying out interlayer polymerization-pyrolysis. The active nitrogen loss is effectively reduced and the graphitization degree of the catalyst is effectively improved by utilizing an almost closed effect of the layered compound to improve the catalytic activity and the stability of the non-noble metal catalyst. The method of the invention has the advantages of simplicity and easy implement, and low production cost; and the catalyst prepared through the method has the advantages of good oxygen reduction catalytic activity and good stability, and can be applied to a fuel cell with a proton exchange membrane as an electrolyte. The fuel cell manufactured with the catalyst can be widely applied to electric automobiles, various spacecrafts, and portable electronic devices, such as cameras, notebook computers, electric toys and the like.

Description

1. Technical field: [0001] The invention belongs to the technical field of fuel cells, in particular to an oxygen-reducing non-noble metal catalyst and a preparation method thereof. 2. Background technology: [0002] Fuel cells have the advantages of high energy conversion efficiency, environmental friendliness, and rapid start-up at room temperature, and are considered to be the most promising chemical power sources for electric vehicles and other civilian applications in the future. At present, the main cathode catalysts for proton exchange membrane fuel cells (PEMFCs) are platinum-based catalysts, but their disadvantages such as high cost, lack of resources, and easy poisoning seriously restrict the development of fuel cells. Therefore, it is of great significance to develop a low-cost and high-performance non-noble metal catalyst for PEMFCs cathode. [0003] In recent years, a lot of research has been done on non-precious metal catalysts at home and abroad. Chinese inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24H01M4/90
CPCY02E60/50
Inventor 魏子栋丁炜陈四国纪巍嘉李莉戚孝天张卫帅崔珊
Owner CHONGQING UNIV
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