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Metal sulfide/MXene compound catalyst for electrolyzing water and preparation method of metal sulfide/MXene compound catalyst

A metal sulfide and composite technology, applied in the field of electrolyzed water, can solve the problem of low activity and achieve unique synergistic effects, simple preparation method, and low manufacturing cost

Active Publication Date: 2020-05-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a metal sulfide / MXene composite catalyst for electrolysis of water, which has high OER activity and can solve the problem of low activity of transition metal sulfide catalysts in the OER reaction in the prior art

Method used

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  • Metal sulfide/MXene compound catalyst for electrolyzing water and preparation method of metal sulfide/MXene compound catalyst
  • Metal sulfide/MXene compound catalyst for electrolyzing water and preparation method of metal sulfide/MXene compound catalyst
  • Metal sulfide/MXene compound catalyst for electrolyzing water and preparation method of metal sulfide/MXene compound catalyst

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Experimental program
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Embodiment 1

[0052] In the metal sulfide / MXene composite catalyst for electrolysis of water in this embodiment, FeS 2 Particles are distributed on the MXene sheet to form FeS 2 / MXene complex catalyst.

[0053] FeS in this example 2 The preparation method of / MXene composite catalyst comprises the steps:

[0054] 1) Add 80mg of sulfur powder and 10mg of MXene tablets into 100mL of carbon disulfide solution, disperse and evaporate to dryness to obtain a mixture of MXene and S;

[0055] 0.275g FeSO 4 ·7H 2 O was added in 70mL of triethylene glycol, stirred to make it dissolve completely to obtain a solution;

[0056] 2) The mixture of MXene and S prepared in step 1) was added to the solution, stirred for 3 hours, then transferred to a 100mL reactor for solvothermal reaction, the reaction temperature was 200°C, and the time was 24 hours; centrifuged, and the solid was washed with water After lyophilization, the freeze-drying temperature is -40 ℃, the time is 24h, and the FeS 2 / 10MXene....

Embodiment 2

[0059] The preparation method of metal sulfide / MXene composite catalyst for electrolysis of water in this embodiment comprises the following steps:

[0060] 1) Add 80mg of sulfur powder and 5mg of TiC MXene tablets (same as Example 1) into 100mL of carbon disulfide solution, evaporate to dryness after dispersing, and obtain a mixture of MXene and S;

[0061] 0.275g FeSO 4 ·7H 2 O was added in 70mL of triethylene glycol, stirred to make it dissolve completely to obtain a solution;

[0062] 2) The mixture of MXene and S prepared in step 1) was added to the solution, stirred for 3 hours, then transferred to a 100mL reactor for solvothermal reaction, the reaction temperature was 200°C, and the time was 24 hours; centrifuged, and the solid was washed with water After lyophilization, the freeze-drying temperature was -40°C and the time was 24h to obtain FeS 2 / 5MXene.

Embodiment 3

[0064] The preparation method of metal sulfide / MXene composite catalyst for electrolysis of water in this embodiment comprises the following steps:

[0065] 1) Add 80mg of sulfur powder and 20mg of TiC MXene flakes (same as Example 1) into 100mL of carbon disulfide solution, evaporate to dryness after dispersing, and obtain a mixture of MXene and S;

[0066] 0.275g FeSO 4 ·7H 2 O was added in 70mL of triethylene glycol, stirred to make it dissolve completely to obtain a solution;

[0067] 2) The mixture of MXene and S prepared in step 1) was added to the solution, stirred for 3 hours, then transferred to a 100mL reactor for solvothermal reaction, the reaction temperature was 200°C, and the time was 24 hours; centrifuged, and the solid was washed with water After lyophilization, the freeze-drying temperature was -40°C and the time was 24h to obtain FeS 2 / 20MXene.

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Abstract

The invention discloses a metal sulfide / MXene compound catalyst for electrolyzing water and a preparation method of the metal sulfide / MXene compound catalyst, and belongs to the technical field of water electrolysis. In the metal sulfide / MXene compound catalyst for electrolyzing water, metal sulfide particles are uniformly distributed on a MXene sheet, and the metal sulfide / MXene compound catalyst is formed; according to the compound catalyst, the respective advantages of the two substances are reserved; moreover, the composite catalyst has the advantages that the specific synergistic effectis achieved, the electron / ion conductivity of each component is enhanced, and the stability and electrochemical performance of the material structure are improved, so that the composite catalyst has good catalytic oxygen evolution reaction performance, and the catalytic performance of electrolyzed water of the catalyst is improved. Tests prove that the activity of the metal sulfide / MXene compoundcatalyst exceeds that of a commercial RuO2 electrocatalyst, and the metal sulfide / MXene compound catalyst can be used as a cheap substitute of a noble metal-based oxygen evolution electrocatalyst.

Description

technical field [0001] The invention relates to a metal sulfide / MXene composite catalyst for electrolyzing water and a preparation method thereof, belonging to the technical field of electrolyzing water. Background technique [0002] Hydrogen production by electrolysis of water is a method of using electric energy to drive water decomposition to produce hydrogen. The advantages of this method are unmatched by many other hydrogen production methods. The method of producing hydrogen energy by electrolysis of water is very efficient, and the purity of the prepared hydrogen is high, and it will not cause environmental pollution and other problems. Therefore, this method is currently a relatively mature and widely used hydrogen production technology. The development of low-cost, high-efficiency catalysts to reduce the overpotential of electrolyzed water has become the main research direction of the current electrolyzed water hydrogen production technology. [0003] However, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C25B11/06C25B1/04
CPCB01J27/22C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 彭生杰陈宇谢耀毅李林林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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