Ternary metal sulfide nanosheet material and preparation and water electrolysis application thereof

A ternary metal and sulfide technology, applied in the field of materials and energy, can solve problems such as low efficiency, unstable process, complex process, etc., and achieve the reduction of adsorption free energy, fast mass transfer and electron transfer capacity, large specific The effect of surface area

Active Publication Date: 2020-10-16
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have disadvantages such as complex process flow, unstable process, and low efficiency, and their application is greatly restricted.

Method used

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  • Ternary metal sulfide nanosheet material and preparation and water electrolysis application thereof
  • Ternary metal sulfide nanosheet material and preparation and water electrolysis application thereof
  • Ternary metal sulfide nanosheet material and preparation and water electrolysis application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Ternary metal sulfide nanosheet Fe 0.9 Ni 2.1 S 2 The preparation method of @NF electrocatalyst comprises the following steps:

[0043] 1) Cut blank nickel foam (1cm×2cm) and use acetone, ethanol, and deionized water to sonicate for 15 minutes respectively to remove surface pollutants, and put it in a 60°C oven for 6 hours before using it as a substrate;

[0044] 2) Add 0.81mg of ferric chloride and 1.2mg of sodium sulfide into 50ml of water, fully dissolve to obtain a mixed solution;

[0045] 3) Transfer the above mixed solution to a 100ml reactor;

[0046] 4) Put the cleaned nickel foam into the mixed solution, set the hydrothermal temperature to 150° C. and the hydrothermal time for 6 hours to obtain a ternary metal sulfide nanosheet electrocatalyst;

[0047] 5) The obtained electrocatalyst was washed three times with water and ethanol respectively, and then dried in an oven at 65° C. for 12 hours.

[0048] Fe will be prepared 0.9 Ni 2.1 S 2 @NF electrocataly...

Embodiment 2

[0061] In the present embodiment, nickel foam is changed into copper foam, all the other are the same as embodiment 1, and Fe x Cu 2-x S@CF electrocatalyst.

[0062] Figure 10 for Fe x Cu 2-x S@CF electrocatalyst and Cu prepared without ferric chloride 2 The SEM image of the S@CF electrocatalyst, it can be seen that the Na 2 Particles will be formed during the etching process of S. If Fe doping is introduced simultaneously during the etching process, Cu can be effectively controlled. 2 S forms a hexagonal sheet morphology.

Embodiment 3

[0064] In the present embodiment, foamed nickel is changed to foamed titanium, all the other are the same as embodiment 1, make Fe x Ti y S@TF electrocatalyst.

[0065] Figure 11 for Fe x Ti y SEM images of S@TF electrocatalyst and TiS@TF electrocatalyst prepared without ferric chloride, it can be seen that the amorphous TiS changes from a three-dimensional network structure to a nanosheet structure after Fe doping.

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Abstract

The invention relates to a ternary metal sulfide nanosheet material and preparation and water electrolysis application thereof. The preparation method of the material comprises the following steps: 1)pretreating foam metal to obtain a matrix; 2) adding ferric chloride and sodium sulfide into water to obtain a mixed solution; and 3) putting the matrix into the mixed solution, carrying out hydrothermal reaction, washing and drying to obtain the ternary metal sulfide nanosheet material, the material is used as a catalyst for water electrolysis reaction. Compared with the prior art, the ternary metal sulfide nanosheet material prepared by the method is excellent in electro-catalytic performance, simple in preparation process and low in cost, can be used for carrying out stable and efficient hydrogen evolution reaction, oxygen evolution reaction and full-water decomposition under different current densities, and has a huge potential value in large-scale hydrogen production application.

Description

technical field [0001] The invention belongs to the technical field of materials and energy, and relates to a general ultra-thin ternary metal sulfide nano sheet material, a preparation method thereof and the application of electrolyzed water. Background technique [0002] With the increasing consumption of fossil fuels and increasing environmental pollution, hydrogen with no carbon emissions and high-quality energy density is considered to be one of the most promising energy carriers in the future. Electrochemical water splitting combined with intermittent solar and wind energy offers a sustainable and feasible method for hydrogen fuel production. During water electrolysis, two electrode half-reactions mainly occur, namely hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). However, due to the existence of energy barriers in the thermodynamic and kinetic processes of these two half-reactions, a high overpotential is required to drive water splitting. St...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J27/043B01J27/122B01J27/125B01J27/128B01J27/135B01J35/04B01J37/06B01J37/10B82Y30/00B82Y40/00C25B1/04C25B11/06
CPCB01J27/04B01J27/043B01J27/122B01J27/125B01J27/128B01J27/135B01J35/0033B01J37/06B82Y30/00B82Y40/00B01J35/04B01J37/10C25B1/04Y02E60/36
Inventor 吴仁兵费奔
Owner FUDAN UNIV
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