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Nitrogen-doped carbon material based on metal organic skeleton and preparation method and application thereof

A metal-organic framework and nitrogen-carbon material technology, applied in the field of nitrogen-doped carbon materials, can solve the problems of inability to be applied on a large scale and low crustal content, and achieve high oxygen reduction catalytic activity and stability, easy operation, and low cost.

Active Publication Date: 2017-08-15
芜湖启博知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an important factor limiting the development of fuel cells is the catalyst for the cathode oxygen reduction reaction. Although platinum-carbon catalysts are effective, platinum is a noble metal with low content in the earth's crust and cannot be used on a large scale. Oxygen reduction catalysts are particularly important, which is an attractive research topic

Method used

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  • Nitrogen-doped carbon material based on metal organic skeleton and preparation method and application thereof
  • Nitrogen-doped carbon material based on metal organic skeleton and preparation method and application thereof
  • Nitrogen-doped carbon material based on metal organic skeleton and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1 A nitrogen-doped carbon material based on a metal-organic framework

[0026] 75mg of Co(NO 3 ) 2 ·6H 2 O, 30 mg of 5‐carboxybenzotriazole, 7 mL of N,N‐dimethylformamide (DMF), 4.75 mL of water, added to a 20 mL polytetrafluoroethylene reactor liner, and Stir at room temperature for 45 minutes.

[0027] Seal the container and place in the oven. Heat to make the temperature of the oven rise from room temperature to 473K, the heating rate is 5°C / min, and keep the temperature under this condition for 24h.

[0028] Cool slowly to room temperature at a cooling rate of 4°C / min, and after standing for at least 1 day, purple needle-like crystals are obtained;

[0029] The crystals were washed with N,N-dimethylformamide (DMF) solution, filtered, and dried in air to obtain the precursor. Yield based on ligand was 62%.

[0030] The temperature was raised to 800°C at a heating rate of 5°C / min, and the precursor was subjected to pyrolysis treatment at 800°C for 3 hou...

Embodiment 2

[0034] Example 2 Nitrogen-doped carbon material based on metal organic framework catalyzes oxygen reduction reaction

[0035] (1) Preparation method: The metal-organic framework-based nitrogen-doped carbon material prepared in Example 1 was used as a catalyst to catalyze the oxygen reduction reaction.

[0036] 1) Take 8 mg of metal-organic framework-based nitrogen-doped carbon material, put it in a 2ml centrifuge tube, add 1.0mL of ethanol solution, and add 0.02mL of Nafion solution with a concentration of 5wt%, to prepare ink, and ultrasonically disperse the ink evenly, ready for use .

[0037] 2) Take 0.02 mL of the above ink and drop it on the surface of a clean glassy carbon electrode with a diameter of 5 mm, and let it dry naturally for later use to obtain a working electrode modified with a nitrogen-doped carbon material based on a metal organic framework.

[0038] (2) CV electrochemical test

[0039] Electrochemical tests were performed on a CHI660e using a rotating d...

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Abstract

The invention discloses a nitrogen-doped carbon material based on a metal organic skeleton and a preparation method and application thereof. The preparation method thereof comprises the following steps: dissolving Co(NO3)2.6H2O and 5-carboxybenzotriazole in proportion in an organic solvent, mixing uniformly, maintaining for 12 hours under 473 K to obtain a crystal, and drying to obtain a precursor; carrying out high-temperature pyrolysis on the precursor in an inert atmosphere, using urea as a nitrogen source for nitrogen doping, and then obtaining a catalyst of the nitrogen-doped carbon material at a high temperature again. The non-precious metal catalyst prepared in the invention has high oxygen reduction catalytic activity and stability and excellent alkali resistance in an alkaline electrolyte, the used raw materials are low in cost, and the preparation method is simple, convenient and easy in operation.

Description

technical field [0001] The invention relates to a nitrogen-doped carbon material based on an organometallic framework (MOF), in particular to a nitrogen-doped carbon material prepared from MOF with oxygen reduction catalytic activity and its preparation method and application. Background technique [0002] As the driving force for the advancement of human society, energy plays a very important role in its development. At present, human beings' demand for energy is increasing, traditional fossil fuels are being consumed in large quantities, and the energy crisis has become increasingly prominent. On the other hand, the combustion of fossil fuels will produce a large amount of carbon dioxide, nitrogen oxides, sulfides and other harmful substances such as exhaust gas and dust, which cause problems such as greenhouse effect and environmental pollution, which seriously threaten the living environment of human beings. Therefore, the two major problems of energy shortage and envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/90H01M4/9008Y02E60/50
Inventor 韩正波李潇龙王诗铭
Owner 芜湖启博知识产权运营有限公司