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1T-MoS2/NiS heterogeneous interface structure catalyst for electro-catalytic hydrogen evolution as well as preparation method and application of 1T-MoS2/NiS heterogeneous interface structure catalyst

A structural catalyst, 1t-mos2 technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low current density and high overpotential of hydrogen evolution reaction, and achieve the effect of improving hydrogen evolution catalytic activity, excellent performance and excellent environmental interface

Pending Publication Date: 2022-04-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the problem of low current density and high overpotential of hydrogen evolution reaction

Method used

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  • 1T-MoS2/NiS heterogeneous interface structure catalyst for electro-catalytic hydrogen evolution as well as preparation method and application of 1T-MoS2/NiS heterogeneous interface structure catalyst
  • 1T-MoS2/NiS heterogeneous interface structure catalyst for electro-catalytic hydrogen evolution as well as preparation method and application of 1T-MoS2/NiS heterogeneous interface structure catalyst
  • 1T-MoS2/NiS heterogeneous interface structure catalyst for electro-catalytic hydrogen evolution as well as preparation method and application of 1T-MoS2/NiS heterogeneous interface structure catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A 1T-MoS for electrocatalytic hydrogen evolution 2 / NiS heterogeneous interface structure catalyst preparation method is specifically completed according to the following steps:

[0042] Step 1, synthesizing the Ni nanosheet skeleton.

[0043] (1) Dissolve 0.1g (mass concentration of 4.0g / L) nickel acetylacetonate in a mixed solution of 20mL N,N-dimethylformamide (DMF), 1mL 1-n-butylamine and 4mL deionized water, Stir ultrasonically at room temperature for 30 minutes, and the ultrasonic frequency is 35kHz to form a homogeneous solution;

[0044] (2) Then transfer the above solution to a 50mL PPL-lined reactor, put it in an oven, and react at 200°C for 48h;

[0045] (3) After the reaction, the gray-black powder was collected by centrifugation at a speed of 9000 r / min, washed with deionized water, and then vacuum-dried at 60° C. for 12 hours. The obtained precursor was called Ni nanosheets.

[0046] Step 2. Synthesis of 1T-MoS 2 / NiS heterostructure catalyst.

[0047...

Embodiment 2

[0052] A 1T-MoS for electrocatalytic hydrogen evolution 2 / NiS heterogeneous interface structure catalyst preparation method is specifically completed according to the following steps:

[0053] Step 1, synthesizing the Ni nanosheet skeleton.

[0054] (1) Synthesize the Ni nanosheet skeleton according to the step 1 of embodiment 1.

[0055] Step 2. Synthesis of 1T-MoS 2 / NiS heterostructure catalyst.

[0056] (1) Get 1mmol of the above-mentioned Ni nanosheets, 1mmol sodium molybdate, and 2.5mmol KSCN dissolved in a mixed solution of 10mL of ethanol and deionized water (V 乙醇 :V 水 =2:8), ultrasonically stirred at room temperature for 30min, and the ultrasonic frequency was 35kHz to form a homogeneous solution;

[0057] (2) Then the above solution was transferred to a 50mL polytetrafluoroethylene-lined reactor, placed in an oven, and reacted at 180°C for 20h, and the reaction heating rate was 3°C / min;

[0058] (3) After the reaction, the gray-black powder was collected by ce...

Embodiment 3

[0060] A 1T-MoS for electrocatalytic hydrogen evolution 2 / NiS heterogeneous interface structure catalyst preparation method is specifically completed according to the following steps:

[0061] Step 1, synthesizing the Ni nanosheet skeleton.

[0062] (1) Synthesize the Ni nanosheet skeleton according to the step 1 of embodiment 1.

[0063] Step 2. Synthesis of 1T-MoS 2 / NiS heterostructure catalyst.

[0064] (1) Take 1mmol of the above-mentioned Ni nanosheets, 1mmol of MoO 3 , and 2.5mmol of thiourea dissolved in a mixed solution of 10mL of ethanol and deionized water (V 乙醇 :V 水 =2:8), ultrasonically stirred at room temperature for 30min, and the ultrasonic frequency was 35kHz to form a homogeneous solution;

[0065] (2) Then the above solution was transferred to a 50mL polytetrafluoroethylene-lined reactor, placed in an oven, and reacted at 180°C for 20h, and the reaction heating rate was 3°C / min;

[0066] (3) After the reaction, the gray-black powder was collected by ...

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Abstract

The invention discloses a 1T-MoS2 / NiS heterogeneous interface structure catalyst for electro-catalytic hydrogen evolution as well as a preparation method and application of the 1T-MoS2 / NiS heterogeneous interface structure catalyst. The preparation method comprises the following steps: firstly, preparing a metal nickel nanosheet in one step by a solvothermal method, and then growing a 1T-MoS2 nanosheet array on the surface of a nickel nanosheet 2D structure as a skeleton in situ to obtain the 1T-MoS2 / NiS nano catalyst with a heterogeneous interface structure. The preparation method disclosed by the invention has the advantages of low equipment requirement, easily controlled reaction conditions, low raw material cost and the like; the nanometer catalyst is constructed from a new angle, and the prepared 1T-MoS2 / NiS heterogeneous interface structure catalyst can be used for efficiently electrolyzing water, has the advantages of low overpotential, good stability and the like in hydrogen evolution under an alkaline condition, and shows a good application prospect of electro-catalytic hydrogen production.

Description

technical field [0001] The invention relates to the fields of new energy material preparation technology and electrochemical energy storage technology, in particular to a 1T-MoS for electrocatalytic hydrogen evolution 2 / NiS heterostructure catalyst and its preparation method and application. Background technique [0002] Hydrogen is an ideal energy carrier, which has the advantages of high calorific value, high gravimetric energy density and no pollution, and is considered as a promising clean energy. Hydrogen production by electrolysis of water is an efficient and sustainable hydrogen production method. The development of this technology is of great significance to the expansion of hydrogen-related new energy fields. Currently, the large-scale application of water electrolysis for hydrogen production is limited by the slow kinetics of the hydrogen evolution reaction (HER) in alkaline media, resulting in high overpotential and energy loss. Using Pt-based catalysts can imp...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B11/052C25B1/04
CPCY02E60/36
Inventor 傅志勇韦何磊梁振兴谭爱东向志朋万凯
Owner SOUTH CHINA UNIV OF TECH
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