Preparation method of supported electro-catalytic nitrogen reduction catalyst MoS2-Fe3O4

A mos2-fe3o4, supported catalyst technology, applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of expensive prices and resources, impossible industrial production, scarcity, etc.

Active Publication Date: 2021-08-31
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Noble metals have excellent catalytic properties, but their high prices and scarcity of resources make their industrial production impossible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Step 1: Weigh 2.000 g of polyethylene glycol and 7.200 g of sodium acetate and fully disperse them into 80 mL of ethylene glycol. Add 2.700 g of ferric chloride hexahydrate into the mixed solution and disperse evenly. After the above solutions are fully mixed Transfer to a polytetrafluoroethylene-lined reactor and react at 200 °C for 8 h. After the reaction, cool to room temperature and wash the obtained product 5 times to obtain Fe with pores. 3 o 4 nanospheres;

[0014] The second step: take 0.1 g of the above-mentioned prepared Fe with holes 3 o 4 Disperse the nanospheres into 80 mL deionized water, stir for 60 minutes, add 0.760 g sodium molybdate dihydrate and 0.600 g thiourea into the uniformly dispersed solution, mix well and transfer to a polytetrafluoroethylene-lined reaction kettle , reacted at 200 °C for 15 h, after the reaction was completed, cooled to room temperature, and washed the obtained product 5 times to obtain the MoS 2 Fe loading on nanoflowers...

Embodiment 2

[0022] Step 1: Weigh 2.050 g of polyethylene glycol and 7.250 g of sodium acetate and fully disperse them into 80 mL of ethylene glycol, add 2.740 g of ferric chloride hexahydrate into the mixed solution and disperse evenly, and mix the above solutions thoroughly Transfer to a polytetrafluoroethylene-lined reactor and react at 200 °C for 8 h. After the reaction, cool to room temperature and wash the obtained product 5 times to obtain Fe with pores. 3 o 4 nanospheres;

[0023] The second step: take 0.12 g of the above-mentioned prepared Fe with holes 3 o 4 Nanospheres were dispersed into 80 mL of deionized water, stirred for 60 minutes, 0.750 g of sodium molybdate dihydrate and 0.620 g of thiourea were added to the uniformly dispersed solution, mixed thoroughly and transferred to a polytetrafluoroethylene-lined reaction kettle , reacted at 200 °C for 15 h, after the reaction was completed, cooled to room temperature, and washed the obtained product 5 times to obtain the MoS ...

Embodiment 3

[0031] Step 1: Weigh 2.010 g of polyethylene glycol and 7.200 g of sodium acetate and fully disperse them into 80 mL of ethylene glycol, add 2.690 g of ferric chloride hexahydrate into the mixed solution and disperse evenly, and mix the above solutions thoroughly Transfer to a polytetrafluoroethylene-lined reactor and react at 200 °C for 8 h. After the reaction, cool to room temperature and wash the obtained product 5 times to obtain Fe with pores. 3 o 4 nanospheres;

[0032] The second step: take 0.102 g of the above-mentioned prepared Fe with holes 3 o 4 Nanospheres were dispersed into 80 mL of deionized water, stirred for 60 minutes, 0.768 g of sodium molybdate dihydrate and 0.610 g of thiourea were added to the uniformly dispersed solution, mixed thoroughly and transferred to a polytetrafluoroethylene-lined reaction kettle , reacted at 200 °C for 15 h, after the reaction was completed, cooled to room temperature, and washed the obtained product 5 times to obtain the MoS...

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PUM

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Abstract

Ammonia, as one of the most important industrial chemicals, plays an irreplaceable role in the fields of pesticides, chemical fertilizers, textiles and the like. However, the production of ammonia is a difficult problem troubling the world all the time. The traditional Hobblog method is still adopted in the industry at present, the reaction can only be carried out under the conditions of high temperature and high pressure, and a large amount of fossil raw materials are wasted and the environment is seriously polluted. Scientific researchers find a method for reducing nitrogen into ammonia gas under an environmental condition. The electro-catalytic nitrogen reduction reaction can reduce N2 into NH3 under an external voltage under the environmental condition, the reaction condition is mild, carbon emission is less, and raw materials are easy to obtain, so that more and more attention is gained in recent years. Due to the strong dipole moment of N=N, nitrogen adsorption and serious hydrogen evolution reaction, electro-catalytic nitrogen reduction still faces many difficulties. Therefore, development of a high-activity and high-selectivity electrochemical catalyst is the key of electro-catalytic nitrogen reduction. The invention provides a preparation method for loading Fe3O4 on MoS2 nanoflowers through a hydrothermal method and application of the obtained catalyst to electro-catalytic nitrogen reduction.

Description

technical field [0001] The present invention relates to the field of preparation and application of inorganic nanopowder, in particular to a method based on hydrothermal method in MoS 2 Fe loading on nanoflowers 3 o 4 Catalyst MoS on 2 -Fe 3 o 4 method and its application in the field of electrocatalytic nitrogen reduction. Background technique [0002] Ammonia acts as an efficient energy carrier (17.8% gravimetric hydrogen density) and due to the absence of CO 2 Emissions become easily transportable energy. With the continuous growth of the population, the demand for fertilizers and energy is increasing day by day in today's world, and the Haber-Bosch method is currently the main means of industrial ammonia production, and more than 500 tons of ammonia are produced every year. However, there are high energy consumption, huge scale and severe reaction conditions (200 atmospheres, 400 atmospheres) in the Haber-Bosch ammonia production process. o C, need iron-based cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/27C25B9/01C25B9/19
CPCC25B11/091C25B1/27C25B9/01C25B9/19
Inventor 魏琴徐晓龙任祥孙旭闫涛吴丹张勇杨兴龙
Owner UNIV OF JINAN
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