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Preparation method and product of cobalt manganese sulfide electrocatalyst

A cobalt-manganese sulfide electrocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of less cobalt-manganese sulfide, achieve low cost, simple operation process, The effect of simple preparation method

Inactive Publication Date: 2018-03-30
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Despite its excellent performance, there are relatively few studies using cobalt-manganese sulfide as hydrogen evolution or oxygen evolution catalysts, and the morphology is mostly irregular nanoparticles.

Method used

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  • Preparation method and product of cobalt manganese sulfide electrocatalyst
  • Preparation method and product of cobalt manganese sulfide electrocatalyst
  • Preparation method and product of cobalt manganese sulfide electrocatalyst

Examples

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preparation example Construction

[0030] The invention relates to a preparation method of a cobalt manganese sulfide electrocatalyst and a cobalt manganese sulfide electrocatalyst prepared by the method. The aforementioned method includes the following core steps:

[0031] i. Take cobalt salt, manganese salt and urea, and dissolve the weighed cobalt salt, manganese salt and urea in water, and stir to obtain a uniform solution;

[0032] ii. placing the solution and the carrier in a reactor for hydrothermal reaction to obtain supported cobalt manganese carbonate;

[0033] iii. Place the supported cobalt-manganese carbonate in an aqueous solution containing a sulfidating agent to carry out a sulfidation reaction to obtain a supported cobalt-manganese sulfide.

[0034] It can be preferred that: the concentration of the cobalt salt is 0.05-0.2 mol / L, the molar ratio of the cobalt salt to the manganese salt is 1:5-5:1, and the total molar ratio of urea to the aforementioned metal salt is 1:1 ~3:1.

[0035] It may...

Embodiment 1

[0042] Weigh 6 mmol of cobalt nitrate, 6 mmol of manganese nitrate and 15 mmol of urea and dissolve them in 60 mL of deionized water. After the dissolution is complete, a purple-red solution is obtained. At the same time, cut out 2.5 cm*6 cm of nickel foam. Use acetone, 3mol / L hydrochloric acid and deionized water to clean it ultrasonically, then pour the mixed solution of cobalt nitrate, manganese nitrate and urea into a 100mL hydrothermal reaction kettle, and immerse the cleaned foamed nickel into the solution, and then put Put the reaction kettle into a blast oven, heat at 90°C for 12 hours, take out the nickel foam and dry it at low temperature, then pour the dried nickel foam and 60mL sodium sulfide solution (0.2mol / L) into a 100mL hydrothermal reaction kettle , put the reaction kettle into a blast oven and heat at 160°C for 8 hours, and finally take out the foamed nickel and dry it at low temperature to obtain a foamed nickel-supported cobalt-manganese sulfide electrocata...

Embodiment 2

[0045] Weigh 3 mmol of cobalt sulfate, 15 mmol of manganese sulfate and 18 mmol of urea and dissolve them in 60 mL of deionized water. After the dissolution is complete, a purple-red solution is obtained. Hydrochloric acid and deionized water are ultrasonically cleaned, and then the mixed solution of cobalt sulfate, manganese sulfate and urea is poured into a 100mL hydrothermal reaction kettle, and the cleaned carbon cloth is immersed in the solution, and then the reaction kettle is put into a blast oven Inside, heat at 80°C for 24 hours, take out the carbon cloth and dry it at low temperature, then pour the dried carbon cloth and 60mL sodium sulfide solution (0.15mol / L) into a 100mL hydrothermal reaction kettle, put the reaction kettle into the drum Heat in an air oven at 20°C for 12 hours, and finally take out the carbon cloth and dry it at low temperature to obtain a carbon cloth-supported cobalt manganese sulfide electrocatalyst.

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Abstract

The invention relates to a cobalt manganese sulfide electrocatalyst and a preparation method thereof. The preparation method comprises the following steps that 1, cobalt salt, manganese salt and ureaare weighed, the weighed cobalt salt, manganese salt and urea are dissolved in water, stirring is conducted, and evenly mixed solution is obtained; 2, the solution and carrier are placed into a reactor together to undergo a hydrothermal reaction, and supported cobalt manganese carbonate is obtained; 3, the supported cobalt manganese carbonate is put into aqueous solution containing vulcanizing agent to undergo a vulcanization reaction, and supported cobalt manganese sulfide is obtained. The cobalt manganese sulfide electrocatalyst and the preparation method have the following advantages that the adopted raw materials are cheap and easy to obtain, the preparation method is simple, operation is easy and convenient, and the cost is low; the manganese element is introduced into cobalt, binarycobalt manganese sulfide is prepared, meanwhile carbon paper, carbon cloth, foam nickel, foam copper, titanium mesh or stainless steel mesh are combined and used as substrate, the two-in-one structureof catalyst and electrode is directly formed, testing is convenient, and the catalyst is endowed with excellent electrochemical catalysis hydrogen evolution or oxygen evolution performance by means of the synergistic effect of cobalt manganese sulfide and the substrate.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a preparation method and product of cobalt manganese sulfide electrocatalyst. Background technique [0002] On the road to solving energy and environmental problems, hydrogen production by electrolysis of water is an efficient and clean technology choice, which has the advantages of high conversion efficiency, simple process, no pollution, and high purity of hydrogen produced. The theoretical voltage required for water electrolysis is 1.23V, but the voltage in actual operation is basically as high as 1.8~2.0V, which is closely related to the excessive activation overpotential of the cathode and anode. Therefore, the development of efficient and stable cathode and anode electrocatalysts has become a research topic in the field of water electrolysis. hotspots and key points. Studies have shown that Pt group metals have the best hydrogen evolution activity, and iridium compounds an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C25B1/04C25B11/04C25B11/12
CPCC25B1/04B01J27/043C25B11/057C25B11/043C25B11/091B01J35/40B01J35/33Y02E60/36
Inventor 鲁望婷何丹李旭文张超凡邱理明黄城周舸梁思雨
Owner JIANGHAN UNIVERSITY
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