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Metal-free nitrogen- functionalized carbon catalyst as well as preparation method and application thereof

A technology of carbon catalyst and nitrogen doping, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. And stability gap, not suitable for industrial production and other problems, to achieve good application prospects, improve catalytic activity, easy to operate

Active Publication Date: 2012-08-15
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structural composition and catalytic mechanism of this type of catalyst have not yet been clarified, and there is still a considerable gap between its catalytic activity and stability compared with Pt.
In addition, the above methods all have defects such as complicated preparation methods, harsh conditions, and unsuitability for industrial production.

Method used

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  • Metal-free nitrogen- functionalized carbon catalyst as well as preparation method and application thereof
  • Metal-free nitrogen- functionalized carbon catalyst as well as preparation method and application thereof
  • Metal-free nitrogen- functionalized carbon catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 0.0400g phthalocyanine and 0.0600g Vulcan XC-72R carbon powder and place them in an agate mortar. Then add 10ml of methanol of analytical grade and grind thoroughly until the methanol is completely volatilized. Put the agate mortar and the mixture inside into a vacuum oven at 40°C for 1 hour to obtain the desired 40% H 2 Pc / C catalyst precursor. Place the dried mixture in the agate mortar in a quartz boat under N 2 Under the protection of the atmosphere, the heating rate was raised to 1000°C at a rate of 10°C / min and the reduction treatment was carried out for 3 hours to obtain the required 40%H 2 Pc / C catalyst.

Embodiment 2

[0028] Weigh 0.0040g phthalocyanine and 0.0600g Vulcan XC-72R carbon powder and place them in an agate mortar. Then add 10ml of methanol of analytical grade and grind thoroughly until the methanol is completely volatilized. Put the agate mortar and the mixture inside into a vacuum oven at 40°C for 1 hour to obtain the desired 40% H 2 Pc / C catalyst precursor. Place the dried mixture in the agate mortar in a quartz boat under N 2 Under the protection of the atmosphere, the heating rate was raised to 600°C at a rate of 10°C / min and the reduction treatment was carried out for 2 hours to obtain the required 40%H 2 Pc / C-600 catalyst.

Embodiment 3

[0030] Weigh 0.0040g phthalocyanine and 0.0600g Vulcan XC-72R carbon powder and place them in an agate mortar. Then add 2ml of methanol of analytical grade, fully grind until the methanol is completely volatilized, repeat this step 5 times, the total amount of methanol is 10ml. Put the agate mortar and the mixture inside into a vacuum oven at 40°C for 1 hour to obtain the desired 40% H 2 Pc / C-600 catalyst precursor. Place the dried mixture in the agate mortar in a quartz boat under N 2 Under the protection of the atmosphere, the heating rate was raised to 700°C at a rate of 20°C / min and the reduction treatment was carried out for 3 hours to obtain the required 40%H 2 Pc / C-700 catalyst.

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Abstract

The invention relates to a metal-free nitrogen-functionalized carbon catalyst as well as a preparation method and application thereof. The catalyst consists of a carbon material and a nitrogenous macrocyclic compound according to a mass ratio being 0.10:0.90-0.90:0.10. The preparation method comprises the following steps of: (1) dissolving the carbon material and the nitrogenous macrocyclic compound in a solvent, grinding the materials until the solvent is entirely volatilized, and drying to obtain a catalyst precursor; and (2) heating the precursor under the protection of an inert gas atmosphere at a temperature of 600-1000 DEG C for calcinations and reduction, so as to obtain the metal-free nitrogen-functionalized carbon catalyst. The catalyst is applied to a membrane electrode combination for a fuel battery. The metal-free nitrogen- functionalized carbon catalyst provided by the invention forms a pyridinic nitrogen-graphitic nitrogen (Nx-C) composite structure with high nitrogen content through high-temperature nitrogen modification pyrolysis treatment, so that the catalytic activity to oxygen is obviously improved. The preparation method is simple, and the metal-free nitrogen- functionalized carbon catalyst has good application prospects in field of water waste treatment of the fuel battery, a metal-air battery, a super capacitor, an energy storage battery, a microbial fuel cell and the like.

Description

technical field [0001] The invention belongs to the field of carbon catalysts and their preparation and application, in particular to a metal-free nitrogen-doped carbon catalyst and its preparation method and application. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy, and has the advantages of high efficiency, low pollution, and diversification. Especially in recent years, with the development of economy and society, energy and environmental pollution have become increasingly serious, and fuel cells have become the most promising future ideal alternative power sources for electric vehicles, distributed power stations, backup power sources and portable appliances. So far, fuel cells are still far from the real industrial application, the main reason is that some key technologies of fuel cells have not been breakthrough. One of the key reasons for this is that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B01J31/02H01M8/02
CPCY02E60/50
Inventor 乔锦丽丁蕾
Owner DONGHUA UNIV
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