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Bimetallic nitrogen doped carbon/molybdenum disulfide composite electrocatalyst material, preparation method thereof and application thereof

A nitrogen-doped carbon and molybdenum disulfide technology, which is applied in the field of electrocatalytic hydrogen evolution, can solve the problems of reducing the number of catalytic active sites, limiting the ability of electron transfer, and serious aggregation of nanosheets, so as to improve the performance of electrocatalytic hydrogen evolution and enhance HER Active, uniform size effect

Inactive Publication Date: 2019-03-22
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MoS 2 There are two disadvantages in HER performance applications: i) Under van der Waals interaction, MoS 2 The nanosheets are severely aggregated, which significantly reduces the number of catalytic active sites; ii) 2H-MoS 2 Due to its poor conductivity, the electron transfer ability is greatly limited

Method used

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  • Bimetallic nitrogen doped carbon/molybdenum disulfide composite electrocatalyst material, preparation method thereof and application thereof
  • Bimetallic nitrogen doped carbon/molybdenum disulfide composite electrocatalyst material, preparation method thereof and application thereof
  • Bimetallic nitrogen doped carbon/molybdenum disulfide composite electrocatalyst material, preparation method thereof and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Step 1) Preparation of metal-organic framework: Disperse 873 mg of cobalt nitrate in 30 mL of anhydrous methanol, disperse 985.2 mg of dimethylimidazole in 10 mL of anhydrous methanol, mix the above two solutions and stir at room temperature for 1 h. The solid was isolated and a metal-organic framework Co-MOF was prepared.

[0026] Step 2) The obtained Co-MOF powder was loaded into a porcelain boat, transferred to a temperature-programmed tube furnace, and under the protection of nitrogen, the o C / min heating up to 600 o C and held for 3 h; after natural cooling to room temperature, a black powder was obtained, which was cobalt metal-doped carbon (Co / NC).

[0027] Step 3) Preparation of cobalt metal-doped carbon / molybdenum disulfide composites by hydrothermal method: Dissolve 120 mg sodium molybdate tetrahydrate and 250 mg thiourea in 25 mL deionized water, pour the solution into a 50 mL reaction kettle, Then add 50 mg of the cobalt metal-doped carbon prepared in step...

Embodiment 2

[0029] Step 1) Preparation of metal-organic framework: 150 mg of zinc nitrate and 1365 mg of cobalt nitrate were dispersed in 30 mL of anhydrous methanol, 1980 mg of dimethylimidazole was dispersed in 10 mL of anhydrous methanol, and the above two solutions were mixed Stir at room temperature for 1 h, collect by centrifugation, and wash several times to prepare the bimetallic organic framework ZnCo-MOF-1.

[0030] Step 2) The obtained ZnCo-MOF-1 powder was loaded into a porcelain boat, transferred to a temperature-programmed tube furnace, and under the protection of nitrogen, the o C / min heating up to 700 o C and keep warm for 1 h. After natural cooling to room temperature, a black powder is obtained, which is bimetallic doped nitrogen carbon (ZnCo / NC-1).

[0031] Step 3) Preparation of bimetallic nitrogen-doped carbon / molybdenum disulfide composites by hydrothermal method: Dissolve 120 mg sodium molybdate tetrahydrate and 250 mg thiourea in 25 mL deionized water, and pour t...

Embodiment 3

[0033] Step 1) Preparation of metal-organic frameworks: 223.1 mg of zinc nitrate and 654.8 mg of cobalt nitrate were dispersed in 30 mL of anhydrous methanol, and 985.2 mg of dimethylimidazole was dispersed in 10 mL of anhydrous methanol. After mixing the above two solutions Stir at room temperature for 1 h, collect by centrifugation, and wash several times to obtain the bimetallic organic framework ZnCo-MOF-2.

[0034] Step 2) The obtained ZnCo-MOF-2 powder was loaded into a porcelain boat, transferred to a temperature-programmed tube furnace, and under the protection of nitrogen, the o C / min heating up to 700 o C and keep warm for 2 h. After natural cooling to room temperature, a black powder is obtained, which is bimetallic doped carbon (ZnCo / NC-2).

[0035]Step 3) Preparation of bimetallic doped carbon / molybdenum disulfide composites by hydrothermal method: Dissolve 120 mg sodium molybdate tetrahydrate and 250 mg thiourea in 25 mL deionized water, pour the solution into ...

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Abstract

The invention relates to a bimetallic nitrogen doped carbon / molybdenum disulfide composite electrocatalyst material and a preparation method thereof. The preparation method of the bimetallic nitrogendoped carbon / molybdenum disulfide composite electrocatalyst material comprises the following specific steps of 1) preparing bimetallic nitrogen doped carbon: preparing a mixed solution of a zinc salt,a cobalt salt and dimethylimidazole from absolute methanol as a solvent to prepare a bimetallic organic framework; and after calcining the bimetallic organic framework at a high temperature, preparing the bimetallic nitrogen doped carbon; and 2) preparing a bimetallic nitrogen doped carbon / molybdenum disulfide composite material by using a hydrothermal method: preparing a mixed solution of sodiummolybdate etrahydrate and thiocarbamide from deionized water as a solvent; and placing the mixed solution and the bimetallic nitrogen doped carbon into a polytetrafluoroethylene high pressure vesselto perform hydrothermal reaction so as to prepare the bimetallic nitrogen doped carbon / molybdenum disulfide composite material. The bimetallic nitrogen doped carbon / molybdenum disulfide composite electrocatalyst material, provided by the invention, has the advantages that excellent catalytic activity and high stability are shown when the prepared composite material is used for electrocatalytic hydrogen evolution reaction, the preparation cost is low, the repeatability is high, and the application prospect is broad.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic hydrogen evolution, and in particular relates to a bimetallic nitrogen-doped carbon / molybdenum disulfide composite electrocatalyst material, a preparation method and an application thereof. Background technique [0002] Due to the increasing global demand for energy consumption, the environmental consequences of burning fossil fuels have brought great incentives to develop clean energy technologies, and electrolysis of water to produce hydrogen is one of the effective ways to replace traditional fossil fuels. Electrocatalytic hydrogen evolution reaction (HER) using platinum or other noble metals as electrocatalysts is considered to be a sustainable and efficient method for hydrogen production, while the use of scarce and high-cost noble metals severely and significantly limits their large-scale applications. In recent years, transition metal sulfides have been shown to potentially replace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/10B01J37/08C25B1/04C25B11/06
CPCC25B1/04B01J27/24B01J37/086B01J37/10C25B11/091B01J35/33Y02E60/36
Inventor 周虎冯建慧袁爱华
Owner JIANGSU UNIV OF SCI & TECH
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