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Nitrogen-doped carbon-coated Co-based MOF derivative material, preparation method thereof and application thereof

A nitrogen-doped carbon and coating technology is applied in the field of nitrogen-doped carbon-coated MOF-derived Co-CoP composite materials and their preparation, which can solve the problem of inability to meet large-scale commercialization needs, limited precious metal reserves, and large catalytic effect. The problem is to improve the catalytic effect of electrolyzed water, broaden the scope of PH use, and achieve the effect of good catalytic effect.

Pending Publication Date: 2019-09-10
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a nitrogen-doped carbon-coated Co-based MOF derivative material and its preparation method, and a nitrogen-doped carbon-coated MOF-derived Co-CoP composite material and its preparation method, which are used to solve the problems existing in the prior art: precious metals In the catalytic process of electrolysis of water, the reserves of precious metals are limited, the catalytic activity is poor, the catalytic effect is large, and the technical problems that cannot meet the needs of large-scale commercialization

Method used

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  • Nitrogen-doped carbon-coated Co-based MOF derivative material, preparation method thereof and application thereof
  • Nitrogen-doped carbon-coated Co-based MOF derivative material, preparation method thereof and application thereof
  • Nitrogen-doped carbon-coated Co-based MOF derivative material, preparation method thereof and application thereof

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Experimental program
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Effect test

Embodiment 1

[0065] A preparation method of Co-based MOF-derived materials coated with nitrogen-doped carbon

[0066] Preparation of metal organic framework compound ZIF-67

[0067] Take 0.4g of cobalt nitrate and 3g of methylimidazole and dissolve them in 20ml of water in an autoclave. The reaction temperature is 150-200°C, and the reaction time is 2h in a high-box oven. After the reaction is cooled, the purple metal organic framework compound ZIF-67 is obtained;

[0068] preparation of solid mixture

[0069] Dissolve 1g of metal-organic framework compound ZIF-67, 1g of polyvinylpyrrolidone and 1g of melamine in 100ml of water to obtain a mixed solution, freeze-dry the mixed solution to obtain a solid mixture;

[0070] Preparation of nitrogen-doped carbon-coated Co-based MOF-derived materials

[0071] The solid mixture is placed in a furnace, purged with argon, calcined at a temperature of 600-1000° C. for 2 hours, and cooled to obtain a Co-based MOF derivative material coated with nitr...

Embodiment 2

[0084] The nitrogen-doped carbon-coated Co-based MOF derived material obtained in Example 1 was mixed with a phosphorus source, calcined for 2 hours at 500°C under argon protection, and cooled naturally to obtain a nitrogen-doped carbon-coated MOF-derived Co-CoP composite Material.

[0085] Experiment description

[0086] A JSM-7500F scanning electron microscope (SEM) was used to observe the morphology of electrolytic water-splitting catalytic materials of nitrogen-doped carbon-coated MOF-derived Co-CoP composites, as shown in Figure 10 shown. It can be seen from the SEM photos that MOF has a good dispersion effect in the carbon matrix. After high-temperature calcination, due to the reaction of the cobalt in the MOF with the carbon-based material, a large number of nanotube structures appear on the surface of the composite material, and the length of the nanotubes is tens to hundreds of nanometers. This special composite structure and good dispersion of nanomaterials revea...

Embodiment 3

[0096] A preparation method of nitrogen-doped carbon-coated MOF-derived Co-CoP composites

[0097] Preparation of metal organic framework compound ZIF-67

[0098] Dissolve cobalt nitrate and methylimidazole in water in an autoclave, the reaction temperature is 150-200°C, the reaction time is 2 hours in a high-box oven, and the purple metal organic framework compound ZIF-67 is obtained after the reaction is cooled;

[0099] preparation of solid mixture

[0100] Dissolving metal-organic framework compound ZIF-67, polyvinylpyrrolidone and melamine in 100ml of water to obtain a mixed solution, and freeze-drying the mixed solution to obtain a solid mixture;

[0101] Preparation of nitrogen-doped carbon-coated Co-based MOF-derived materials

[0102] The solid mixture was placed in a furnace and purged with argon, calcined at a temperature of 600 ° C for 2 h, and cooled to obtain a Co-based MOF derivative material coated with nitrogen-doped carbon

[0103] Preparation of nitrogen-...

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Abstract

The invention discloses a preparation method of a nitrogen-doped carbon-coated Co-based MOF derivative material, which comprises the following steps: preparing a metal organic framework compound ZIF-67, dissolving cobalt nitrate and methylimidazole in water in a reaction kettle, reacting at 150-200 DEG C for 2h, and cooling to obtain a metal organic framework compound ZIF-67; preparing a solid mixture: dissolving the metal organic framework compound ZIF-67, polyvinylpyrrolidone and melamine in water to obtain a mixed solution, freeze-drying that mixed solution to obtain the solid mixture; preparing the nitrogen-doped carbon-coated Co-based MOF derivative material: placing the solid mixture in a furnace, purging with argon, calcining at 800-1000 DEG C for 2 h, and cooling to obtain the nitrogen-doped carbon-coated Co-based MOF derivative material. In the process of preparation, the raw materials are easy to obtain and the synthetic route is simple, and the derived materials have good catalytic effect in both anodic and cathodic reactions during the process of electrolyzing water.

Description

technical field [0001] The present invention relates to the technical field of catalysts, specifically, a nitrogen-doped carbon-coated Co-based MOF derivative material and a preparation method thereof, and a nitrogen-doped carbon-coated MOF-derived Co-CoP composite material and a preparation method thereof . Background technique [0002] At present, the traditional energy supply can no longer meet people's needs. The use of fossil energy will cause serious environmental pollution. The form of hydropower generation will cause changes in the natural ecology. Nuclear power generation has potential radiation hazards. Geothermal power generation may cause earthquakes. Therefore, safe and clean hydrogen energy has become an ideal renewable energy source. However, hydrogen energy is a secondary energy source, which cannot be obtained directly from nature like primary energy sources such as fossil energy or solar energy. It must be produced by using other energy sources through cer...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C25B1/04C25B11/06
CPCB01J27/24C25B1/04C25B11/04B01J35/33B01J35/615Y02E60/36
Inventor 何毅李虹杰李振宇王顺慧何腾麻晓宇陈春林钟菲
Owner SOUTHWEST PETROLEUM UNIV
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