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Cobalt-sulfur compound/nitrogen-sulfur-doped carbon composite catalyst and preparation method thereof

A cobalt-sulfur compound and carbon composite technology, applied in the field of electrocatalysis, can solve the problems of unsatisfactory catalytic performance of catalysts, hindering large-scale commercial production, uneven distribution of catalysts, etc. Effect

Active Publication Date: 2019-06-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of cobalt-sulfur compounds and carbon-based composite materials in the prior art is generally complicated, and the precursors are expensive or simply mixed directly with carbon materials to improve catalytic activity. Weak, unstable attachment and other problems lead to unsatisfactory catalytic performance and poor stability of the catalyst, thus hindering its large-scale commercial production

Method used

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  • Cobalt-sulfur compound/nitrogen-sulfur-doped carbon composite catalyst and preparation method thereof
  • Cobalt-sulfur compound/nitrogen-sulfur-doped carbon composite catalyst and preparation method thereof
  • Cobalt-sulfur compound/nitrogen-sulfur-doped carbon composite catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A kind of cobalt sulfur compound / nitrogen-sulfur doped carbon composite catalytic material, its preparation method comprises the steps:

[0036] 1) Weigh 0.001mol cobalt nitrate, 0.004mol thiourea and 0.5g polyaniline, mix and ball mill for 2h at 180rmp to obtain mixed raw materials;

[0037] 2) Transfer the mixed raw materials obtained in step 1) into a crucible, and under an Ar atmosphere, first heat to 200°C for 4 hours, then heat up to 500°C for 2 hours, and cool to room temperature with the furnace, then use deionized water and anhydrous The ethanol was washed 3 times each (the washing process was all realized by centrifuging at 8000rpm for 3min), and the washing obtained was put into a vacuum drying oven and dried at 80°C for 12h to obtain the cobalt-sulfur compound / nitrogen-sulfur compound Heterocarbon composite catalytic material (cobalt disulfide / nitrogen sulfur doped carbon composite electrocatalytic material).

Embodiment 2

[0039] A kind of cobalt sulfur compound / nitrogen-sulfur doped carbon composite catalytic material, its preparation method comprises the steps:

[0040] 1) Weigh 0.001mol cobalt nitrate, 0.004mol thiourea and 0.5g polyaniline, mix and ball mill for 2h at 180rmp to obtain mixed raw materials;

[0041]2) Transfer the mixed raw materials obtained in step 1) into a crucible, and in an Ar atmosphere, first heat to 200°C for 4 hours, then heat up to 600°C for 2 hours, and cool to room temperature with the furnace, then use deionized water and anhydrous The ethanol was washed 3 times each (the washing process was all realized by centrifuging at 8000rpm for 3min), and the washing obtained was put into a vacuum drying oven and dried at 80°C for 12h to obtain the cobalt-sulfur compound / nitrogen-sulfur compound Heterocarbon composite catalytic material (cobalt sulfide / nitrogen sulfur doped carbon composite electrocatalytic material).

Embodiment 3

[0043] A kind of cobalt sulfur compound / nitrogen-sulfur doped carbon composite catalytic material, its preparation method comprises the steps:

[0044] 1) Weigh 0.001mol cobalt nitrate, 0.012mol thiourea and 1.5g polyaniline, mix and ball mill for 2h at 180rmp to obtain mixed raw materials;

[0045] 2) Transfer the mixed raw materials obtained in step 1) into a crucible, and under an Ar atmosphere, first heat to 180°C for 6 hours, then heat up to 900°C for 4 hours, and cool to room temperature with the furnace, then use deionized water and anhydrous The ethanol was washed twice each (the washing process was all realized by centrifuging at 8000rpm for 3min), and the washing obtained was put into a vacuum drying oven and dried at 80°C for 6h to obtain the cobalt-sulfur compound / nitrogen-sulfur compound Heterocarbon composite catalytic material (nine cobalt octasulfide / nitrogen-sulfur doped carbon composite electrocatalytic material).

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Abstract

The invention belongs to the field of electrocatalysis materials, and particularly discloses a cobalt-sulfur compound / nitrogen-sulfur-doped carbon composite catalyst and a preparation method thereof.According to the invention, cobalt salt, thiourea and an organic carbon source are used as main raw materials, and heat treatment is carried out in an inert atmosphere by adopting a one-step solid-phase reaction method to obtain the cobalt-sulfur compound / nitrogen-sulfur-doped carbon catalyst material; the obtained cobalt-sulfur compound / nitrogen-sulfur-doped carbon composite catalyst material isstable in structure and high in electrical conductivity, and can show excellent catalytic performance and high stability; and the preparation method is simple, mild in the reaction conditions and environment-friendly, and the composition of the product is controllable, so that the method is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a cobalt-sulfur compound / nitrogen-sulfur doped carbon composite catalytic material and a preparation method thereof. Background technique [0002] Electrochemical energy storage and conversion devices are currently considered to be the cleanest, most efficient, and environmentally friendly method to deal with energy crisis and environmental pollution. Among them, new energy devices (such as fuel cells, metal-air batteries, electrolyzed water, etc.) that use oxygen oxidation and reduction reactions as the main electrode reactions have been widely recognized by people because of their high efficiency, high energy density, and low carbon dioxide emissions. focus on. At present, noble metal platinum (Pt) and its composite materials are recognized as excellent ORR electrocatalysts; noble metals ruthenium (Ru) and iridium (Ir) or their oxides are considered to be ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/90
CPCY02E60/50
Inventor 余志勇赵丰
Owner WUHAN UNIV OF TECH
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