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Carbon-based non-metallic oxygen reduction catalyst as well as preparation method and application thereof

A catalyst and non-metallic technology, applied in the field of electrochemistry, can solve the problems of difficult large-scale preparation, limited heteroatom content, complicated operation, etc., and achieve the effect of strong controllability of material structure, controllable content of species, and low price

Active Publication Date: 2014-09-03
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The controllability of this reaction method is relatively poor, and the content of doped heteroatoms is limited. The most important thing is that this type of method is complicated to operate, so it is not easy to prepare on a large scale

Method used

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  • Carbon-based non-metallic oxygen reduction catalyst as well as preparation method and application thereof
  • Carbon-based non-metallic oxygen reduction catalyst as well as preparation method and application thereof
  • Carbon-based non-metallic oxygen reduction catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] This example is used to illustrate the preparation method of the N element-doped oxygen reduction catalyst provided by the present invention.

[0091] Mix 1g (7.81mmol) of terephthalonitrile (CAS No. 623-26-7) and 0.53g (3.9mmol) of anhydrous zinc chloride, and transfer them to a 10ml quartz tube, and replace the quartz with argon air in the tube, seal it and put it into a muffle furnace, react at 700°C for 0.5 hours, cool down to room temperature (25°C) naturally, open the glass tube, take out the polymerization product, and successively use 1mol / L Washed with hydrochloric acid and pure water, then placed in a vacuum oven and dried at 120°C for 10 hours to obtain an N-doped polymer product, which can be used as an oxygen reduction catalyst. Among them, the content of nitrogen in the catalyst is 10.3%, and the specific surface area is 1710m 2 / g, the pore size distribution range is: 0.5~4nm.

Embodiment 2

[0093] This example is used to illustrate the preparation method of the N element-doped oxygen reduction catalyst provided by the present invention.

[0094] Mix 1 g (7.81 mmol) of terephthalonitrile (CAS number: 623-26-7) and 10.64 g (78 mmol) of anhydrous zinc chloride, and transfer them to a 10ml quartz tube, and replace the quartz tube with argon After sealing it, put it into a muffle furnace, react at 700°C for 80 hours, cool it to room temperature (25°C) naturally, open the glass tube, take out the polymerized product, and successively wash it with 1mol / L hydrochloric acid , washed with pure water, and then placed in a vacuum drying oven and dried at 120 °C for 10 hours to obtain an N-doped polymer product, which can be used as an oxygen reduction catalyst. In the obtained oxygen reduction catalyst, the content of nitrogen element was 2.1%. The specific surface area is 2980m 2 / g, pore size distribution: 0.4~10nm.

Embodiment 3

[0096] This example is used to illustrate the preparation method of the N element-doped oxygen reduction catalyst provided by the present invention.

[0097] Mix 1g (7.81mmol) of terephthalonitrile (CAS No.: 623-26-7) and 1.06g (7.8mmol) of anhydrous zinc chloride, and transfer them to a 10ml glass tube, replace the glass with argon air in the tube, seal it and put it into a muffle furnace, react at 300°C for 5 hours, cool down to room temperature (25°C) naturally, open the glass tube, take out the polymerized product, and use 1mol / L of Washed with hydrochloric acid and pure water, then placed in a vacuum oven and dried at 120°C for 10 hours to obtain an N-doped polymer product, which can be used as an oxygen reduction catalyst. Among them, the content of nitrogen in the catalyst is 18.4%, and the specific surface area is 143m 2 / g, the pore size distribution range is: 0.4~2.8nm.

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Abstract

The invention belongs to the field of electrochemistry catalysis and particularly discloses a carbon-based non-metallic oxygen reduction catalyst as well as a preparation method and an application thereof. The carbon-based non-metallic oxygen reduction catalyst is a polymer which is prepared by doping other heteroatom (e.g. B, O, F, P, S, Cl, Br and I) derived from an N-contained polymerization product which is obtained by polymerizing aromatic nitrile compounds. The catalyst provided by the invention is high in conductivity, has a carbon skeleton structure with a high specific surface area and can be doped with many kinds of heteroatom. The catalyst has good oxygen reduction activity and high stability and is free from influence of methanol and carbon monoxide; besides, the catalyst is wide in application scope and is suitable for various systems containing oxygen reduction reaction, including a lithium air cell, a sodium air cell, kinds of fuel cells and so on; compared with an existing commercial platinum carbon (Pt / C) catalyst, the catalyst has the advantage of simple preparation, efficiency, environment friendliness, low cost and excellent performance.

Description

technical field [0001] The invention belongs to the field of electrochemistry and relates to a catalyst, in particular to a carbon-based non-metallic oxygen reduction catalyst, a preparation method and an application thereof. Background technique [0002] With the gradual consumption of fossil fuels and the increasingly serious environmental problems, clean energy technology has become an urgent and critical technology. As a clean energy technology, low-temperature fuel cells have the advantages of high specific energy, mild working conditions, and fast start-up speed, and are an ideal new energy source. In low-temperature fuel cells, the most critical part is the catalyst part that accelerates the oxygen reduction reaction, and the current commercial catalyst is a platinum-carbon (Pt / C) catalyst. [0003] However, as a precious metal, platinum is not only expensive, but also scarce in nature. Therefore, it is considered to be an effective way to finally realize large-scal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J35/10B01J31/26B01J31/30B01J31/32H01M4/90
CPCY02E60/50
Inventor 智林杰郝龙
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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