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Preparation method and application of phosphorus-doped molybdenum disulfide/porous carbon composite material

A technology of molybdenum disulfide and composite materials, applied in chemical instruments and methods, chemical/physical processes, hybrid capacitor electrodes, etc., can solve the problems of potential safety hazards in phosphorus source raw materials, increased active surface area, and fewer catalytic active sites , to achieve excellent electrolytic water hydrogen evolution catalytic activity, low cost, and high synthesis yield

Pending Publication Date: 2022-01-25
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems with molybdenum disulfide-based catalysts: (1) the basal surface is inactive, and only the edge has electrocatalytic activity, so the active surface area needs to be increased; (2) there are few intrinsic catalytic active sites, and more Many defects or other active sites; (3) Intrinsic conductivity is poor, and conductive carrier support is required
The preparation method of functionalized modified molybdenum disulfide nanosheets provided by the invention is simple and low in cost, but there are potential safety hazards in the calcination process of phosphorus source raw materials
[0007] After analysis, the existing preparation method of phosphorus-doped molybdenum disulfide composite porous carbon needs to be improved

Method used

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  • Preparation method and application of phosphorus-doped molybdenum disulfide/porous carbon composite material
  • Preparation method and application of phosphorus-doped molybdenum disulfide/porous carbon composite material

Examples

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Embodiment 1

[0026] (1) Prepare porous carbon material with natural agar powder as carbon source and urea as nitrogen source; take 1g of agar powder, dissolve it in 20mL deionized water, heat it in a water bath at 90°C and keep stirring until it dissolves, then take Disperse 1g of potassium hydroxide and 1g of urea in the above solution, stir until dissolved; put it in an oven at 80°C for 7 hours; put the dried material in a tube furnace, 2 The temperature was raised to 750°C at a rate of 5°C / min in an atmosphere, kept for 2 hours and then slowly lowered to room temperature; the obtained powder was alternately washed several times with dilute hydrochloric acid and deionized water, and finally the carbon was dried at 100°C for 8 hours to prepare A nitrogen-doped porous carbon material was obtained; 6 mg of nitrogen-doped porous carbon material was stirred in 30 mL deionized water for 30 min; sodium molybdate and thioacetamide were dissolved in the above solution at a ratio of 1:6, and the mi...

Embodiment 2

[0034] (1) Prepare porous carbon material with natural agar powder as carbon source and urea as nitrogen source; take 1g of agar powder, dissolve it in 20mL deionized water, heat it in a water bath at 90°C and keep stirring until it dissolves, then take Disperse 1g of potassium hydroxide and 1g of urea in the above solution, stir until dissolved; put it in an oven at 80°C for 7 hours; put the dried material in a tube furnace, 2The temperature was raised to 750°C at a rate of 5°C / min in an atmosphere, kept for 2 hours and then slowly lowered to room temperature; the obtained powder was alternately washed several times with dilute hydrochloric acid and deionized water, and finally the carbon was dried at 100°C for 8 hours to prepare A nitrogen-doped porous carbon material was obtained; 6 mg of nitrogen-doped porous carbon material was stirred in 30 mL deionized water for 30 min; sodium molybdate and thioacetamide were dissolved in the above solution at a ratio of 1:6, and the mix...

Embodiment 3

[0037] (1) Prepare porous carbon material with natural agar powder as carbon source and urea as nitrogen source; take 1g of agar powder, dissolve it in 20mL deionized water, heat it in a water bath at 90°C and keep stirring until it dissolves, then take Disperse 1g of potassium hydroxide and 1g of urea in the above solution, stir until dissolved; put it in an oven at 80°C for 7 hours; put the dried material in a tube furnace, 2 The temperature was raised to 750°C at a rate of 5°C / min in an atmosphere, kept for 2 hours and then slowly lowered to room temperature; the obtained powder was alternately washed several times with dilute hydrochloric acid and deionized water, and finally the carbon was dried at 100°C for 8 hours to prepare A nitrogen-doped porous carbon material was obtained; 6 mg of nitrogen-doped porous carbon material was stirred in 30 mL deionized water for 30 min; sodium molybdate and thioacetamide were dissolved in the above solution at a ratio of 1:6, and the mi...

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Abstract

The invention discloses a porous carbon / phosphorus-doped molybdenum disulfide composite material derived from natural agar and used for producing hydrogen by electrolyzing water, wherein a catalyst has a hierarchical structure compounded by molybdenum disulfide and a porous carbon matrix, and the prepared porous carbon / phosphorus-doped molybdenum disulfide composite material is high in dispersity and controllable in morphology. According to the invention, natural agar is used as a carbon source, namely a novel utilization mode of biological raw materials is provided, and the process is simple; through heteroatom doping, molybdenum disulfide structure defects are caused, and the overall conductivity of the material is improved; and the catalyst shows excellent water electrolysis hydrogen evolution catalytic activity under the acidic condition, and is expected to replace platinum-based and other precious metal water electrolysis hydrogen evolution catalysts used at the present stage.

Description

technical field [0001] The invention relates to a preparation method of a porous carbon / phosphorus-doped molybdenum disulfide composite material derived from agar, belongs to the technical field of electrode materials, and is mainly used in electrode materials such as electrocatalytic hydrogen evolution reaction, sodium ion batteries and supercapacitors. Background technique [0002] Energy supply mainly depends on fossil fuels, which has caused serious side effects to our society, such as air pollution and global warming. Therefore, it is urgent to develop clean and renewable alternative local energy sources to meet social needs and overcome environmental problems. Among them, hydrogen is considered as an effective clean and renewable energy because it can be produced by splitting water. During water splitting, efficient catalysts are required to drive the hydrogen evolution reaction (HER). Although platinum (Pt) and Pt-based alloys exhibit the highest electrocatalytic ac...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J35/04C25B1/04C25B11/091H01G11/24H01G11/30H01G11/34H01G11/46H01M4/36H01M4/58H01M4/583
CPCB01J27/19C25B1/04C25B11/091H01M4/362H01M4/5815H01M4/583H01G11/30H01G11/46H01G11/34H01G11/24B01J35/33B01J35/56Y02E60/10Y02E60/36
Inventor 曹春玲谢飞
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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