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Nonmetal oxygen reduction catalyst material as well as preparation method and application thereof

A non-metal and catalyst technology, which is applied in the field of non-metal oxygen reduction catalyst materials and its preparation, can solve the problems of nitrogen active site loss, function, difficult to activate nitrogen, etc., and achieve the promotion of catalysis, environmental friendliness and simple process Effect

Inactive Publication Date: 2017-01-25
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a non-metallic oxygen reduction catalyst material and its preparation method and application, thereby solving the problem of the prior art in the preparation of non-noble metals and non-metallic catalysts. The high-temperature graphitization heat treatment will cause a large amount of nitrogen active sites to be lost, making it difficult for the active nitrogen to fully play its role

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  • Nonmetal oxygen reduction catalyst material as well as preparation method and application thereof
  • Nonmetal oxygen reduction catalyst material as well as preparation method and application thereof
  • Nonmetal oxygen reduction catalyst material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] According to the mass, mix sucrose and melamine in a ratio of 2:1, add 4 g of sucrose and 2 g of melamine in a 400 ml beaker, mix and stir well, add 15 ml of concentrated sulfuric acid drop by drop, then put it into the autoclave, control the pressure Carbonization is 15Mpa at 200℃ for 6 hours. After the reaction is completed, it is filtered, washed, and dried at 75℃ to obtain the intermediate product; then the obtained intermediate product is subjected to a second carbonization reaction at 600℃ under the protection of nitrogen (high temperature deep carbonization) After 6 hours of treatment, a non-metal oxygen reduction catalyst material was obtained.

[0038] Physical characterization and performance testing of the intermediate product and non-metal oxygen reduction catalyst material prepared in this example are as follows:

[0039] Such as figure 1 , figure 2 As shown, figure 1 It is a scanning electron microscope result image of the intermediate product obtained by the ...

Embodiment 2

[0044] According to the mass, mix sucrose and melamine in a ratio of 2:1, add 4 g of sucrose and 2 g of melamine in a 400 ml beaker, mix and stir evenly, add 10 ml of concentrated sulfuric acid drop by drop, then put it into the autoclave, control The pressure is 10 Mpa, 120 ℃ carbonization for 10 h once, after the reaction is completed, suction filtration, washing, and drying at 40 ℃, the intermediate product is obtained; then the obtained intermediate product is subjected to the second carbonization reaction at 600 ℃ under the protection of nitrogen (high temperature depth Carbonization) treatment for 2 h to obtain non-metallic oxygen reduction catalyst materials.

[0045] Similar to Embodiment 1, the non-metal oxygen reduction catalyst material prepared in this embodiment has similar performance advantages. Among them, the oxygen reduction test found that on the non-metal oxygen reduction catalyst material electrode prepared in this example, the initial potential and half-wave...

Embodiment 3

[0047] According to the mass, mix sucrose and melamine in a ratio of 2:1, add 4 g of sucrose and 2 g of melamine in a 400 ml beaker, mix and stir evenly, add 10 ml of concentrated sulfuric acid drop by drop, then put it into the autoclave, control The pressure is 10 Mpa, 140 ℃ carbonization for 10 h once, after the reaction is completed, suction filtration, washing, and drying at 50 ℃ to obtain the intermediate product; then the obtained intermediate product is under the protection of nitrogen, 800 ℃ secondary carbonization reaction (high temperature Deep carbonization) treatment for 2 h to obtain non-metallic oxygen reduction catalyst materials.

[0048] Similar to Embodiment 1, the non-metal oxygen reduction catalyst material prepared in this embodiment has similar performance advantages. Among them, the oxygen reduction test found that on the non-metal oxygen reduction catalyst material electrode prepared in this example, the initial potential and half-wave potential of the ox...

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Abstract

The invention discloses a nonmetal oxygen reduction catalyst material as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing a compound containing carbon, hydrogen and oxygen with melamine according to a predetermined proportion; dropwise adding concentrated sulfuric acid, putting into a high-pressure reaction kettle, and performing primary carbonization reaction for 6-10h at 120-200 DEG C to obtain an intermediate product; and performing secondary carbonization reaction on the intermediate product for 2-6h at 600-1,000 DEG C under nitrogen protection to obtain the nonmetal oxygen reduction catalyst material. In the preparation method disclosed by the invention, a compound containing carbon, hydrogen and oxygen is used as a carbon source, and melamine is used as a nitrogen source; after low-temperature carbonization with concentrated sulfuric acid, the nonmetal oxygen reduction catalyst material is formed after high-temperature calcination under nitrogen protection; nitrogen and carbon are skillfully combined; and by introducing the nitrogen atoms, the catalytic effect of carbon on the oxygen reduction reaction is promoted. The method is simple in technology and environment-friendly and very suitable for preparing the nonmetal oxygen reduction catalyst material of a fuel cell.

Description

Technical field [0001] The present invention relates to the field of catalyst materials, in particular to a non-metal oxygen reduction catalyst material and a preparation method and application thereof. Background technique [0002] Fuel cell, as an environmentally friendly energy utilization technology, can directly convert chemical energy into electrical energy, and has always received extensive attention. However, due to its main use of platinum-containing catalysts, the cost is high. The high cost problem has severely restricted the development and commercialization of fuel cell technology. The development of non-precious metal and non-metal catalysts has become the most important research topic in the field of fuel cells. At present, the preparation of non-precious metal and non-metal catalysts must meet the following conditions: ① Nitrogen source, such as containing N 4 Structure macrocyclic ligand, NH 3 , CH 3 CN; ②Carbon source, such as carbon black carrier, polyacryloni...

Claims

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Application Information

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IPC IPC(8): H01M4/96
CPCH01M4/96Y02E60/50
Inventor 季山王荣方王辉吕维忠
Owner SHENZHEN UNIV
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