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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  • Abstract
  • Description
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  • Application Information

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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

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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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Example Embodiment

[0025] Example 1

[0026] (1) A porous carbon material is prepared as a carbon source as a nitrogen source, and the urea is prepared as a nitrogen source; 1 g of agar powder, dissolved in a 20 ml deionized water, heating in a 90 ° C water bath and continuously stirred to dissolve, then take 1 g of potassium hydroxide and 1 g of urea were dispersed in the above solution, stirred to dissolve; put it in an oven at 80 ° C for 7 h; after drying material is placed in a tube furnace, in N 2 The atmosphere was raised to 750 ° C under a rate of 5 ° C / min, and then slowed down to room temperature after 2 h; the obtained powder was alternately washed several times with dilute hydrochloric acid and deionized water, and finally drying carbon at 100 ° C for 8 h. Doped porous carbon material is obtained; the mixture was stirred in 30 ml of nitrogen doped porous carbon material in 30 ml of deionized water, and sodium molybdate and thiosulfonaceamide ratio was dissolved in the above solution, an...

Example Embodiment

[0033] Example 2

[0034] (1) A porous carbon material is prepared as a carbon source as a nitrogen source, and the urea is prepared as a nitrogen source; 1 g of agar powder, dissolved in a 20 ml deionized water, heating in a 90 ° C water bath and continuously stirred to dissolve, then take 1 g of potassium hydroxide and 1 g of urea were dispersed in the above solution, stirred to dissolve; put it in an oven at 80 ° C for 7 h; after drying material is placed in a tube furnace, in N 2The atmosphere was raised to 750 ° C under a rate of 5 ° C / min, and then slowed down to room temperature after 2 h; the obtained powder was alternately washed several times with dilute hydrochloric acid and deionized water, and finally drying carbon at 100 ° C for 8 h. Doped porous carbon material is obtained; the mixture was stirred in 30 ml of nitrogen doped porous carbon material in 30 ml of deionized water, and sodium molybdate and thiosulfonaceamide ratio was dissolved in the above solution, and...

Example Embodiment

[0036] Example 3

[0037] (1) A porous carbon material is prepared as a carbon source as a nitrogen source, and the urea is prepared as a nitrogen source; the agar powder is taken from the agar powder, dissolved in a 20 mL of ion water, heating in a 90 ° C water bath and continues to dissolve, and then take 1 g of potassium hydroxide and 1 g of urea were dispersed in the above solution, stirred to dissolve; put it in an oven at 80 ° C for 7 h; after drying material is placed in a tube furnace, in N 2 The atmosphere was raised to 750 ° C under a rate of 5 ° C / min, and then slowed down to room temperature after 2 h; the obtained powder was alternately washed several times with dilute hydrochloric acid and deionized water, and finally drying carbon at 100 ° C for 8 h. Doped porous carbon material is obtained; the mixture was stirred in 30 ml of nitrogen doped porous carbon material in 30 ml of deionized water, and sodium molybdate and thiosulfonaceamide ratio was dissolved in the a...

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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
CPCB01J27/19B01J35/0033B01J35/04C25B1/04C25B11/091H01M4/362H01M4/5815H01M4/583H01G11/30H01G11/46H01G11/34H01G11/24Y02E60/10Y02E60/36
Inventor 曹春玲谢飞
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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