Preparation method and application of nitrogen and iron modified carbon material

A carbon material and carbon powder technology, which is applied in the preparation of the carbon material, the application in the preparation of fuel cells, and the field of carbon materials modified with nitrogen and iron, can solve the shortage of resources, restrict the industrialization process of low-temperature fuel cells, and the expensive price of precious metals and other problems, to achieve the effect of aerobic reduction performance, improvement of oxygen reduction catalytic activity, and improvement of catalytic effect

Inactive Publication Date: 2013-08-21
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, carbon-supported platinum and platinum alloy catalysts are the best performance and most widely used oxygen reduction catalysts for low-temperature fuel cells. However, noble metals such as platinum and ruthenium are expensive and scarce in resources, which seriously restricts the industrialization of low-temperature fuel cells.

Method used

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  • Preparation method and application of nitrogen and iron modified carbon material
  • Preparation method and application of nitrogen and iron modified carbon material
  • Preparation method and application of nitrogen and iron modified carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 150 ml of ultra-pure water to a 400 ml beaker, heat to boiling, add 4 g of melamine, stir to fully dissolve; then add 4 g of commercial XC-72 carbon powder, continue to stir to mix evenly, and then ultrasonically disperse for 10 minutes; Then slowly drop 10 mL of FeCl with a concentration of 2 mol / L 3 Aqueous solution, stirred at room temperature for 24 h, suction filtered, washed, dried in an oven at 60 °C for 10 h, the resulting product was placed in a tube furnace, and heat-treated at 600 °C for 2 h under the protection of nitrogen to obtain nitrogen and iron modified carbon powder .

[0028] Through the oxygen reduction test, it is found that the onset potential and half-wave potential of the oxygen reduction reaction are positively shifted by 89 mV and 42 mV respectively compared with the traditional commercial XC-72 carbon powder when the decorated carbon powder material modified with nitrogen and iron is used as the cathode electrode of the fuel cell .

Embodiment 2

[0030] Add 150 ml of ultrapure water into a 400 ml beaker, heat to boiling, add 4 g of melamine, stir to dissolve to fully dissolve; then add 8 g of commercial XC-72 carbon powder, continue to stir and mix evenly, and then ultrasonically disperse for 10 minutes; then Slowly add 10 mL of FeCl with a concentration of 3 mol / L dropwise 3 Aqueous solution, stirred and reacted at room temperature for 24 h, suction filtered, washed, dried in an oven at 60 °C for 10 h, the resulting product was placed in a tube furnace, and heat-treated at 800 °C for 2 h under the protection of nitrogen to obtain nitrogen and iron modified carbon powder .

[0031] Through the oxygen reduction test, it is found that the onset potential and half-wave potential of the oxygen reduction reaction are positively shifted by 121mV and 72mV respectively compared with the traditional commercial XC-72 carbon powder when the decorated carbon powder material modified with nitrogen and iron is used as the cathode el...

Embodiment 3

[0033] Add 150 ml of ultrapure water into a 400 ml beaker, heat to boiling, add 4 g of melamine and stir to fully dissolve; then add 4 g of carbon nanotubes, continue to stir and mix evenly, and then ultrasonically disperse for 10 minutes; then slowly add 10 mL of concentration 2 mol / L FeCl 3 The aqueous solution was stirred at room temperature for 24 hours, suction filtered, washed, and dried at 60 °C for 10 h. The obtained product was placed in a tube furnace and heat-treated at 600 °C for 2 h under the protection of nitrogen to obtain nitrogen and iron-modified carbon nanotubes.

[0034] Through the oxygen reduction test, it is found that the onset potential and half-wave potential of the oxygen reduction reaction are positively shifted by 106 mV and 57 mV respectively compared with the carbon nanotubes when the decorated carbon powder material modified with nitrogen and iron is used as the cathode electrode of the fuel cell.

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Abstract

The invention provides a nitrogen and iron modified carbon material, belonging to the technical field of composite materials. The material takes melamine and FeCl3 as modifiers, and active ingredients such as N, Fe and the like are doped in carbon powder/a carbon nano tube, so that the catalytic action of the carbon material on oxygen reduction reaction is effectively improved, and the carbon material has good catalytic activity. Therefore, the carbon material can be applied to oxygen reduction catalytic reaction of fuel cells as a catalyst material. Through experimental determination, the cathode electrodes of the fuel cells prepared from the material show better oxygen reduction properties than traditional commercial XC-72 carbon powder electrodes, and the oxygen reduction catalytic activity is obviously improved. The material is simple in preparation process, is environment-friendly and is a non-noble metal oxygen reduction catalyst with potential application.

Description

Technical field [0001] The present invention is a composite material technology field, involving a carbon material for nitrogen and iron; the present invention also involves the preparation method of the carbon material; the invention also involves invention and the carbon material as an oxygen reduction reaction catalyst in the preparation of fuel cells to prepare fuel cellsApplications. Background technique [0002] As an environmentally friendly energy utilization technology, fuel cells can directly convert chemical energy to electrical energy, showing broad application prospects in terms of electric vehicle power power, mobile power, micro power supply, and small power generation devices.The cathode oxygen reaction of fuel cells is an important factor in impressive fuel cell electrocatalytic response.Therefore, oxygen rear catalyst is one of the hot spots of fuel cell electrical catalytic research.At present, carbon -loading platinum and platinum alloy catalysts are the best ...

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 王荣方马妍姣王辉季山冯汉青
Owner NORTHWEST NORMAL UNIVERSITY
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