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A kind of metal sulfide/mxene composite catalyst for electrolysis of water and preparation method thereof

A metal sulfide and catalyst technology, applied in the field of electrolysis of water, can solve the problem of low activity, and achieve the effects of good catalytic performance, simple preparation method, and enhanced electronic/ionic conductivity.

Active Publication Date: 2022-04-08
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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  • A kind of metal sulfide/mxene composite catalyst for electrolysis of water and preparation method thereof
  • A kind of metal sulfide/mxene composite catalyst for electrolysis of water and preparation method thereof
  • A kind of metal sulfide/mxene composite catalyst for electrolysis of water and preparation method thereof

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Effect test

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 composite catalyst for electrolyzing water and a preparation method thereof, belonging to the technical field of electrolyzing water. In the metal sulfide / MXene composite catalyst for electrolyzing water of the present invention, the metal sulfide particles are evenly distributed on the MXene sheet to form a metal sulfide / MXene composite catalyst. The composite catalyst not only retains the respective advantages of the two substances, Moreover, it has a unique synergistic effect, which enhances the electronic / ionic conductivity of each component, improves the stability and electrochemical performance of the material structure, makes the composite catalyst have good catalytic oxygen evolution reaction performance, and improves the electrolysis of the catalyst. Catalytic properties of water. Tests have shown that the activity of metal sulfide / MXene composite catalysts in the present invention exceeds that of commercial RuO 2 Electrocatalyst as an inexpensive alternative to noble metal-based oxygen evolution electrocatalysts.

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 Patents(China)
IPC IPC(8): B01J27/22C25B11/091C25B1/04
CPCB01J27/22B01J35/0033C25B11/04C25B1/04Y02E60/36
Inventor 彭生杰陈宇谢耀毅李林林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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