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Cobaltous sulfide/ nitrogen-doped mesoporous carbon material, preparation method and application thereof

A technology of nitrogen-doped mesoporous carbon and cobalt sulfide, applied in nanotechnology for materials and surface science, fuel cell half-cells and secondary battery-type half-cells, structural parts, etc., can solve the problem of electrocatalysis Problems such as poor oxygen evolution ability, achieve high repeatability, high stability and cycle performance, and excellent dual-functional characteristics

Active Publication Date: 2019-11-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of literature reports have shown that non-noble metal-modified nitrogen-doped porous carbon materials, especially mesoporous materials, have electrocatalytic oxygen reduction performance comparable to commercial platinum-carbon catalysts, but their electrocatalytic oxygen evolution ability is poor [Nat.nanotechnol,10,444- 452 (2015)]

Method used

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  • Cobaltous sulfide/ nitrogen-doped mesoporous carbon material, preparation method and application thereof
  • Cobaltous sulfide/ nitrogen-doped mesoporous carbon material, preparation method and application thereof
  • Cobaltous sulfide/ nitrogen-doped mesoporous carbon material, preparation method and application thereof

Examples

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Embodiment 1

[0039] This example provides a method for preparing a cobalt sulfide / nitrogen-doped mesoporous carbon material (CoSx@NMC) with bifunctional activity, such as figure 1 As shown, the specific preparation steps are as follows:

[0040] Step 1: Put 5g of silica nano-silicon spheres (500nm) in a 100mL beaker, add 15mL of 1M HCl solution, stir to form a paste and ultrasonically vibrate to obtain a uniformly dispersed silica template;

[0041] Step 2: Put 5.625g of polyquaternium 44 in a 100mL beaker, add 15mL of HCl with a concentration of 1M and fully stir to disperse it evenly to obtain polyquaternium 44 solution;

[0042] Step 3: Under the condition of magnetic stirring, 3.75g FeSO 4 ·7H 2 O and 1.79g CoSO 4 ·7H 2 O was dissolved in 20 mL of HCl with a concentration of 1M, fully dissolved, slowly added to the polyquaternium 44 solution obtained in step 2 and stirred to disperse evenly, and then the obtained mixed solution was added to the silica template obtained in step 1 I...

Embodiment 2

[0047] This example provides a method for preparing a cobalt sulfide / nitrogen-doped mesoporous carbon material (CoSx@NMC) with bifunctional activity, such as figure 1 As shown, the specific preparation steps are as follows:

[0048] Step 1: Put 5g of silica nano-silicon spheres (500nm) in a 100mL beaker, add 15mL of 1M HCl solution, stir it into a paste with a glass rod and then ultrasonically oscillate to obtain a uniformly dispersed silica template;

[0049] Step 2: Put 5.625g of polyquaternium 44 in a 100mL beaker, add 15mL of HCl with a concentration of 1M and fully stir to disperse it evenly to obtain polyquaternium 44 solution;

[0050] Step 3: Under the condition of magnetic stirring, 5.625g FeSO 4 ·7H 2 O was dissolved in 20mL of HCl with a concentration of 1M, fully dissolved, slowly added to the polyquaternium 44 solution obtained in step 2 and stirred to disperse evenly, and then the obtained mixed solution was added to the silica obtained in step 1 Template agen...

Embodiment 3

[0055] This example provides a method for preparing a cobalt sulfide / nitrogen-doped mesoporous carbon material (CoSx@NMC) with bifunctional activity, such as figure 1 As shown, the specific preparation steps are as follows:

[0056] Step 1: Put 5g of silica nano-silicon spheres (500nm) in a 100mL beaker, add 15mL of 1M HCl solution, stir it into a paste with a glass rod and then ultrasonically oscillate to obtain a uniformly dispersed silica template;

[0057] Step 2: Put 5.625g of polyquaternium 44 in a 100mL beaker, add 15mL of HCl with a concentration of 1M and fully stir to disperse it evenly to obtain polyquaternium 44 solution;

[0058] Step 3: Under the condition of magnetic stirring, 5.36g CoSO 4 ·7H 2 O was dissolved in 20mL of HCl with a concentration of 1M, fully dissolved, slowly added to the polyquaternium 44 solution in step 2 and stirred to make it evenly dispersed, and then the obtained mixed solution was added to the silica template obtained in step 1 and s...

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Abstract

The invention discloses a preparation method for a cobaltous sulfide / nitrogen-doped mesoporous carbon material (CoSx@NMC) with bifunctional activities. The preparation method adopts a one-pot methodto prepare the mesoporous carbon material with oxygen reduction and oxygen evolution reaction in one step, i.e., a high polymer containing nitrogen and sulphur elements is used as an organic precursor, ferrous sulfate and cobalt sulfate are taken as metal precursors, the organic precursor and the metal precursors are evenly mixed under the assistance of solvent, and a mixture is subjected to high-temperature carbonization under an inert atmosphere to obtain CoSx in-situ loaded nitrogen-doped mesoporous carbon material of a 2-5nm size. By use of the method, under a blending function of double metals, on one hand, cobalt aggregation can be effectively inhibited, on the other hand, nitrogen active sites with efficient catalytic oxygen reduction and cobaltous sulfide particles with oxygen evolution activities are synchronously generated on a mesoporous carbon substrate, and the mesoporous carbon material which is finally obtained can be used on a zinc air battery to realize a long-time high-stability charging and discharging cycle.

Description

technical field [0001] The invention belongs to the field of preparation and application of oxygen electrochemical reduction / precipitation bifunctional catalysts, and in particular relates to a preparation method and application of a cobalt sulfide / nitrogen doped mesoporous carbon material. Background technique [0002] At present, the contradiction between the depletion of energy and the rapid development of human society inevitably leads to the outbreak of various environmental problems, and it is imminent to develop new, clean, efficient energy that can meet the requirements of sustainable development. Among them, the electrochemical energy source represented by the rechargeable zinc-air battery has attracted widespread attention due to its low cost, environmental friendliness, and high energy density. However, the most important factor hindering the development of zinc-air batteries is the development and utilization of cathode catalysts (air electrodes) [J. Mater. Chem....

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M12/08B82Y30/00
CPCH01M4/9083H01M12/08B82Y30/00Y02E60/10
Inventor 乔锦丽刘聪刘佳闻王永霞郭佳宁王旭
Owner DONGHUA UNIV
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