MoS2/Ni3S2 electrode material as well as preparation method and application thereof

An electrode material, a technology for hydrothermal reaction, applied in electrodes, chemical instruments and methods, electrolysis components, etc., can solve problems such as poor electrical conductivity, and achieve the effects of high preparation yield, good electrocatalytic activity, and large industrialization value

Active Publication Date: 2018-12-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MoS 2 It is the most widely studied electrocatalyst material for hydrogen production. Its special edge Mo-S bond is the active site for hydrogen production, but it has problems such as poor conductivity.

Method used

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  • MoS2/Ni3S2 electrode material as well as preparation method and application thereof
  • MoS2/Ni3S2 electrode material as well as preparation method and application thereof
  • MoS2/Ni3S2 electrode material as well as preparation method and application thereof

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preparation example Construction

[0036] In a specific embodiment of the present invention, a MoS 2 / Ni 3 S 2 The preparation method of electrode material, described method comprises:

[0037]S1. After adding the Mo source and the S source to the water and mixing them evenly, add nickel foam thereto;

[0038] S2. Perform hydrothermal reaction on the mixed solution with nickel foam added in step S1, and purify after cooling.

[0039] In the present invention, the foamed nickel is used as the substrate, and the foamed nickel is directly hydrothermally grown on it, and the foamed nickel not only participates in the reaction as a nickel source, but also serves as a substrate supporting material.

[0040] In yet another specific embodiment of the present invention, in the step S1,

[0041] Mo source is sodium molybdate;

[0042] The S source is any one of thiourea, thioacetamide, and L-cysteine;

[0043] In yet another specific embodiment of the present invention, the S source is thioacetamide; it has been pr...

Embodiment 1

[0056] Synthesis of MoS by a one-step hydrothermal method 2 / Ni 3 S 2 Electrode: cut 1*4cm 2 The foamed nickel was ultrasonically cleaned in ethanol, acetone, water and 3M hydrochloric acid for 15 minutes each. 0.331 mmol Na 2 MoO 4 2H 2 O (80 mg) and 1.43 mmol thioacetamide (108 mg) were added to 30 mL of water, wherein the molar ratio of Mo source to S source was 1:4.32, and after stirring for 30 minutes, a piece of 1 cm*4 cm nickel foam was added. Transfer to a 40mL autoclave lined with polytetrafluoroethylene, heat in an oven at 200°C for 21h, and cool to room temperature naturally. After cooling, the material was removed, rinsed with water and ethanol, and dried for use. MoS synthesized from other sulfur sources 2 / Ni 3 S 2 For the electrode, just replace thioacetamide with thiourea or L-cysteine, and keep other conditions unchanged.

[0057] attached figure 1 It is the X-ray diffraction pattern of the product obtained in this embodiment, as can be seen from t...

Embodiment 2

[0065] Synthesis of MoS by a one-step hydrothermal method 2 / Ni 3 S 2 Electrode: cut 1*4cm 2 The foamed nickel was ultrasonically cleaned in ethanol, acetone, water and 3M hydrochloric acid for 15 minutes each. 0.331 mmol Na 2 MoO 4 2H 2 O (80 mg) and 1 mmol thioacetamide (75 mg) were added to 25 mL of water, where the molar ratio of Mo source to S source was 1:3, and after stirring for 30 minutes, a piece of 1 cm*4 cm nickel foam was added. Transfer to a 40mL autoclave lined with polytetrafluoroethylene, heat in an oven at 180°C for 24h, and cool to room temperature naturally. After cooling, the material was removed, rinsed with water and ethanol, and dried for use.

[0066] MoS synthesized from other sulfur sources 2 / Ni 3 S 2 For the electrode, just replace thioacetamide with thiourea or L-cysteine, and keep other conditions unchanged.

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Abstract

The invention relates to a MoS2/Ni3S2 electrode material as well as a preparation method and application thereof, which belongs to the technical field of environmental protection and energy of hydrogen production by virtue of electric decomposition of water. The application of different sulfur sources is verified to have great influence for the morphology and performance of a catalyst; and by virtue of comparison, the MoS2/Ni3S2 electrode synthesized by using thioacetamide as a sulfur source has optimum morphology, performance and reaction active site, the over-potential for the reaction can be greatly reduced, and the energy loss in the electrochemical hydrogen production process can be reduced. Meanwhile, the synthetic method is simple, and the foam nickel self-supported MoS2/Ni3S2 electrode can be synthesized by adopting a one-step hydrothermal method, so that the industrialized production and actual application value is high.

Description

technical field [0001] The invention belongs to the field of environmental protection and energy technology for hydrogen production by electrolysis of water, and specifically relates to a MoS 2 / Ni 3 S 2 Electrode and its preparation method and application. Background technique [0002] In recent years, a large amount of energy consumption has become a serious problem restricting the survival and development of human beings. Traditional fossil fuels are not only non-renewable, but also cause great harm to the environment. Hydrogen energy has many significant advantages such as high efficiency, clean and pollution-free, safe and renewable, high combustion calorific value and no carbon emissions, and is regarded as the most ideal alternative energy source for fossil fuels. Therefore, hydrogen production technology is a very important research direction and hotspot. [0003] After recent years of research, transition metal sulfides have a good application in the electrocata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02C25B1/04C25B11/06
CPCB01J27/02B01J35/0033C25B1/04C25B11/04Y02E60/36
Inventor 黄柏标刘小磊王朋王泽岩张晓阳秦晓燕郑昭科刘媛媛张倩倩
Owner SHANDONG UNIV
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