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Nitrogen-doped porous carbon nanosheet-supported non-noble metal catalyst and preparation method thereof

A nitrogen-doped porous carbon, non-precious metal technology, used in chemical instruments and methods, physical/chemical process catalysts, nanotechnology, etc. Synthetic, good for repetition and environmental protection, wide range of effects

Active Publication Date: 2019-01-08
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on polyionic liquids is basically randomly selected among polyionic liquids that are easy to synthesize, so the advantages of easy functional adjustment of polyionic liquids have not been fully utilized, so the performance of the prepared catalyst needs to be further improved

Method used

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  • Nitrogen-doped porous carbon nanosheet-supported non-noble metal catalyst and preparation method thereof
  • Nitrogen-doped porous carbon nanosheet-supported non-noble metal catalyst and preparation method thereof
  • Nitrogen-doped porous carbon nanosheet-supported non-noble metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Add 0.25 mol of vinylimidazole to a single-necked flask, then add 0.25 mol of nitric acid (concentration: 1 mol / L), stir at room temperature for 2 hours, then raise the temperature to 50°C, and stir for 12 hours to obtain a viscous liquid.

[0038] (2) Add 2.5 mol of cobalt nitrate to the ethanol solution of the viscous liquid above, stir at 70°C, react for 2 hours, and dry at 50°C to obtain a purple solid powder.

[0039] (3) Put the above solid powder into a porcelain boat, calcinate in a tube furnace, use N2 as protective gas, flow rate is 10mL / min, heat up to 100°C at a rate of 5°C / min, keep warm for 1 hour, and then The temperature was raised to 650°C at a rate of ℃ / min for calcination for 2 hours, and the product was naturally cooled to room temperature to obtain a black fluffy solid product, and the nitrogen-doped carbon nanosheet-supported Co catalyst was obtained after the product was ground.

Embodiment 2

[0041] (1) Add 0.1 mol of propenylimidazole to a one-necked flask, then add 1 mol of nitric acid, stir at room temperature for 2 hours, then raise the temperature to 60°C, stir for 15 hours, and obtain a viscous liquid.

[0042] (2) Add 0.05 mol of cobalt nitrate to the above viscous liquid, stir at 70° C., and react for 1 hour to obtain a purple solid powder.

[0043] (3) Put the above-mentioned solid powder into a porcelain boat, calcinate in a tube furnace, use N2 as protective gas, flow rate is 25mL / min, heat up to 100°C at a rate of 5°C / min, keep warm for 1 hour, and then The temperature was raised to 800°C at a rate of °C / min, kept at a temperature of 2 hours, and naturally cooled to room temperature to obtain a black fluffy solid, which was ground to obtain a catalyst powder.

Embodiment 3

[0045] (1) Add 1mol 1-butenylimidazole to a single-necked flask, then add 0.5mol nitric acid (concentration: 0.5mol / L), stir at room temperature for 2 hours, then raise the temperature to 50°C and stir for 12 hours to obtain a viscous liquid .

[0046] (2) Add 0.05 mol of ferric nitrate to the above viscous liquid, stir at 70° C., and react for 2 hours to obtain solid powder.

[0047] (3) Put the above solid powder into a porcelain boat, calcinate in a tube furnace, use N2 as protective gas, raise the temperature to 100 degrees at 5°C / min, keep it warm for 1 hour, then raise the temperature to 900°C at 5°C / min, and keep it warm After two hours, the temperature was naturally lowered to obtain a black fluffy solid, which was ground to obtain a catalyst powder.

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Abstract

The invention relates to nitrogen-doped porous carbon nanosheet-supported non-noble metal catalyst and a preparation method thereof. The catalyst is made by embedding metal and metal oxide nanoparticles into nitrogen-doped porous carbon nanosheets or supporting them to the surfaces of the nitrogen-doped porous carbon nanosheets; the preparation method comprises: 1), synthesizing a polymerizable ionic liquid monomer; 2), reacting the obtained ionic liquid with a metal salt precursor, and drying to obtain an intermediate product, solid powder; 3), placing the obtained solid powder in a magnetic boat, placing in a tubular furnace fitted with a quartz tube, charging an inertial gas at a certain flow rate, heating to 600-1000 DEG, holding the temperature for 0.5-5 h, and naturally cooling to room temperature to obtain the catalyst. The poly-ionic liquid is used as the precursor, metal supporting capacity is high, the cost is low, oxygen reduction and oxygen evolution catalytic activity is high, the prepared product has stable performance, and the preparation method is simple and is easy to scale up and industrially apply.

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to oxygen reduction and oxygen evolution reactions, in particular to a nitrogen-doped porous carbon nanosheet loaded non-noble metal catalyst and a preparation method thereof. Background technique [0002] Oxygen reduction reaction and reverse reaction oxygen evolution reaction are important electrode reactions, which play a key role in metal oxygen batteries and fuel cells, but the reaction is difficult. To overcome this difficulty, a large number of noble metal catalysts must be used, especially It is a Pt catalyst to realize the reaction. Due to the high price of this type of precious metal, the cost of this type of power supply is relatively high, which becomes the main bottleneck of this type of power supply technology. To solve this problem, many researchers have done a lot of work trying to reduce the noble metal loading, but in the long run, the ultimate solution should be to find no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10H01M4/90B82Y30/00B82Y40/00
CPCB01J27/24B01J35/10B82Y30/00B82Y40/00H01M4/9041H01M4/9083Y02E60/50
Inventor 尹振高建马娜王虹陈春杰沈聪
Owner TIANJIN POLYTECHNIC UNIV
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