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Molybdenum sulfide/fluoride host-guest catalytic material, preparation method and application

A catalytic material, fluoride-based technology, applied in the direction of electrolysis components, electrodes, electrolysis process, etc., can solve the problems that the size of ion channels cannot be changed, the ability and stability of hydrogen evolution need to be improved, and achieve the improvement of electrocatalytic activity and ability of hydrogen evolution , the effect of widening ion channels

Active Publication Date: 2022-02-18
SUZHOU JINHONG GAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, doping cannot change the size of the ion channel, and its hydrogen evolution ability and stability need to be improved.

Method used

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  • Molybdenum sulfide/fluoride host-guest catalytic material, preparation method and application
  • Molybdenum sulfide/fluoride host-guest catalytic material, preparation method and application
  • Molybdenum sulfide/fluoride host-guest catalytic material, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 2.42g (0.01mol) sodium molybdate (Na 2 MoO 4 .2H 2 O), dissolved in 30 mL of deionized water, and ultrasonically dispersed for 30 minutes. Another weighed 3.05g (0.04mol) thiourea [(NH 2 ) 2 CS], dissolved in 30mL deionized water, ultrasonically dispersed for 30 minutes. The thiourea aqueous solution was added dropwise into the sodium molybdate aqueous solution, and the mixed solution was ultrasonically dispersed for 30 minutes. After the ultrasonication, the mixed aqueous solution was fixed to 80mL and transferred to a 100mL polytetrafluoroethylene-lined high-pressure hydrothermal reactor, the reactor was sealed, and then placed in a constant temperature box and heated to 200°C. 24 h. After the reaction is over, cool naturally, filter with suction, wash with deionized water and ethanol until neutral, and remove soluble matter. The final product was dried in a vacuum oven at 60 °C for 6 h to obtain MoS 2 Body material.

[0030] Weigh KF (2.788g) and dissolv...

Embodiment 2

[0033] Weigh 2.42g (0.01mol) sodium molybdate (Na 2 MoO 4 .2H 2 O), dissolved in 30 mL of deionized water, and ultrasonically dispersed for 30 minutes. Another weighed 3.05g (0.04mol) thiourea [(NH 2 ) 2 CS], dissolved in 30 mL of deionized water, was also ultrasonically dispersed for 30 min. The thiourea aqueous solution was added dropwise into the sodium molybdate aqueous solution, and the mixed solution was ultrasonically dispersed for 30 minutes. After the ultrasonication, the mixed aqueous solution was fixed to 80mL and transferred to a 100mL polytetrafluoroethylene-lined high-pressure hydrothermal reactor, the reactor was sealed, and then placed in a constant temperature box and heated to 200°C. 24 h. After the reaction is over, cool naturally, filter with suction, wash with deionized water and ethanol until neutral, and remove soluble matter. The final product was dried in a vacuum oven at 60 °C for 6 h to obtain MoS 2 Body material.

[0034] Weigh NaF (2.015 g...

Embodiment 3

[0037] Weigh 2.42g (0.01mol) sodium molybdate (Na 2 MoO 4 .2H 2 O), dissolved in 30 mL of deionized water, and ultrasonically dispersed for 30 minutes. Another weighed 3.05g (0.04mol) thiourea [(NH 2 ) 2 CS], dissolved in 30 mL of deionized water, was also ultrasonically dispersed for 30 min. The thiourea aqueous solution was added dropwise into the sodium molybdate aqueous solution, and the mixed solution was ultrasonically dispersed for 30 minutes. After the ultrasonication, the volume of the mixed aqueous solution was adjusted to 80mL and transferred to a 100mL polytetrafluoroethylene-lined high-pressure hydrothermal reactor, the reactor was sealed, and then heated to 210°C in an incubator to react. 22h. After the reaction is over, cool naturally, filter with suction, wash with deionized water and ethanol until neutral, and remove soluble matter. The final product was dried in a vacuum oven at 60 °C for 6 h to obtain MoS 2 Body material.

[0038] Weigh NaF (2.700 g...

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Abstract

The invention discloses a molybdenum sulfide / fluoride host-guest catalytic material, preparation method and application, which comprises a molybdenum sulfide host compound and an interlayer intercalator guest compound, and the interlayer intercalator is inserted into the (002) crystal plane of the molybdenum sulfide matrix Between, the interlayer intercalation agent is a fluorine compound. The catalytic material of the present invention adopts the technical scheme of widening the ion channel to increase the ion transmission rate in the electrochemical hydrogen evolution process, thereby effectively improving the electrocatalytic hydrogen evolution activity of the catalytic material.

Description

technical field [0001] The invention relates to new energy sources, in particular to a molybdenum sulfide / fluoride host-guest catalytic material, preparation method and application. Background technique [0002] Using renewable energy (light, wind and hydropower) to electrolyze water to produce hydrogen can achieve carbon peaking and carbon neutrality. The noble metal platinum electrode is considered as an ideal hydrogen evolution material for water electrolysis due to its low hydrogen evolution overpotential and low Tafel slope. However, precious metal resources are limited and expensive, so it is difficult to promote large-scale application in industry. To this end, non-noble metal hydrogen evolution electrocatalysts have been developed. Molybdenum sulfide (MoS 2 ) has attracted much attention because of the hydrogen adsorption of sulfur edges in its structure similar to that of Pt metal. It has three structures, namely 1T-MoS 2 , 2H-MoS 2 and 3R-MoS 2 . 1T-MoS 2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C25B1/04
CPCC25B11/04C25B1/04Y02E60/36
Inventor 李华陈莹邹丽刘守清
Owner SUZHOU JINHONG GAS CO LTD
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