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Preparation and application of a heteroatom-doped functionalized carbon material

A heteroatom, functionalized technology, applied in the field of preparation of functionalized carbon materials, can solve the problems that carbon materials are difficult to encapsulate with high quality, difficult to form carbon nanocomposites, hinder development and practical application, etc., and achieve excellent methanol resistance. Effects of poisoning performance, good HER catalytic activity, and good industrial application prospects

Active Publication Date: 2020-07-21
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-polymerized carbon material precursors are rare, because their vapor pressure is difficult to control at higher temperatures, and it is difficult to form carbon materials
However, an important disadvantage of carbon materials prepared by using polymerized precursors is that it is difficult to form carbon nanocomposites. In addition, the carbon materials obtained by this method are difficult to use for high-quality packaging, and the carbon yield is also low. All of these are Seriously hindered its development and practical application

Method used

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  • Preparation and application of a heteroatom-doped functionalized carbon material
  • Preparation and application of a heteroatom-doped functionalized carbon material
  • Preparation and application of a heteroatom-doped functionalized carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Catalyst [BMIm][BF 4 ]-700-Co-20% preparation

[0040] a. Preparation of doping material: 1g [BMIm][BF 4 ] and 1 g of silica sol sonicated in 30 mL of 0.07M CoCl 2 In the solution, stir magnetically at 60°C for 12 hours, and dry the product to obtain the doped material product;

[0041] b.[BMIm][BF 4 ] - Preparation of 700-Co-20%: Carbonize the above-mentioned doped material at 700°C for 2 hours in a nitrogen atmosphere, and use HF to remove the template from the obtained carbon material (the carbon material is immersed in HF with a mass percentage of 20% for etching 12h), the product was centrifuged, washed, dried overnight, and ground to obtain [BMIm][BF 4 ] -700-Co-20% carbon material.

[0042] 2. Oxygen reduction test

[0043] Weigh 5mg [BMIm][BF 4 ] -700-Co-20% Add 0.5mL absolute ethanol and 10μL Nafion (Dupont, 5 wt%) solution, sonicate for 30min, take 3μL and apply it on the glassy carbon electrode. The test was carried out in a three-electrode system....

Embodiment 2

[0047] 1. Catalyst 3 [BMIm][BF 4 ]-700-Co-11% preparation

[0048] a. Preparation of doping material: 1g [BMIm][BF 4 ] and 3g silica sol sonicated in 30mL 0.07MCoCl 2 The solution was magnetically stirred at 60° C. for 12 hours, and the obtained product was dried.

[0049] b. 3[BMIm][BF 4 ]-700-Co-11% preparation: with embodiment 1.

[0050] 2. Oxygen reduction test

[0051] Test condition and method are with embodiment 1, and test result is as Figure 8 shown. Depend on Figure 8 It can be seen that when the rotation speed of the rotating disk electrode is 1600rmp, the scanning rate is 0.01V / s, and the electrolyte is 0.1M KOH, the oxygen reduction onset potential is -0.03V.

[0052] 3. Electrolyzed water hydrogen evolution test

[0053] Test condition and method are with embodiment 1, and test result is as Figure 9 shown. Depend on Figure 9 It can be seen that when the scan rate is 0.01V / s, 0.5MH 2 SO 4 When it is an electrolyte, the electrolytic water hydroge...

Embodiment 3

[0055] 1. Catalyst [BMIm][BF 4 ]-800-Co-20% preparation

[0056] a. Preparation of doping material: Same as Example 1.

[0057] b.[BMIm][BF 4 ] - Preparation of 800-Co-20%: Carbonize the material obtained in the above a above at 800°C for 2 hours in a nitrogen atmosphere, and etch the obtained carbon material with HF (the carbon material is immersed in HF with a mass percentage of 20% for 12 hours. ) to remove the template, the product was centrifuged, washed, dried overnight, and ground to obtain [BMIm][BF 4 ] -800-Co-20% carbon material.

[0058] 2. Oxygen reduction test

[0059] Test condition and method are with embodiment 1, and test result is as Figure 10 shown. Depend on Figure 10 It can be seen that when the rotation speed of the rotating disk electrode is 1600rmp, the scanning rate is 0.01V / s, and the electrolyte is 0.1M KOH, the oxygen reduction onset potential is -0.012V.

[0060] 3. Electrolyzed water hydrogen evolution test

[0061] Test condition and m...

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PUM

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Abstract

The invention provides preparation of a heteroatom doped functional carbon material. With ionic liquid containing heteroatoms N, B, S, Cl, F as a raw material, and silica sol as a template, physical mixing is performed in transition metal iron, cobalt and nickel salt solution, high temperature carbonization is performed in a nitrogen atmosphere, and the template is removed by using HF to obtain the heteroatom doped functional carbon material. The functional carbon material has good ORR catalytic activity in acidic and alkaline conditions, has excellent anti methanol toxicity and good stability, expresses good HER catalytic activity under acidic conditions, and contains no precious metal, so that the price is low, the heteroatom doped functional carbon material is expected to replace the commercial Pt / C ORR and HER bifunctional catalyst, and thus has very good industrial application prospect.

Description

technical field [0001] The invention relates to a functionalized carbon material doped with heteroatoms, in particular to a preparation method of a functionalized carbon material containing heteroatoms N, B, S, Cl, F, which is mainly used as a fuel cell cathode oxygen reduction catalytic reaction (ORR) and electrolytic water hydrogen evolution reaction (HER) catalysts also have certain application prospects in the field of methanol fuel cell technology. Background technique [0002] Fuel cells, as energy production devices, have attracted extensive attention due to their potential high efficiency, low pollution output, and high specific energy density. Hydrogen is regarded as one of the promising energy sources to replace traditional fossil fuels, and has attracted much attention as an efficient energy source. In clean energy production, water electrolysis relies on efficient electrocatalysts to split water into hydrogen and oxygen to store energy in the form of chemical fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88H01M8/1011C25B11/06C25B1/04
CPCC25B1/04C25B11/091H01M4/88H01M4/90H01M8/1011Y02E60/36Y02E60/50Y02P70/50
Inventor 童金辉马文梅
Owner NORTHWEST NORMAL UNIVERSITY
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