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Oxygen-deficient molybdenum oxide/nickel sulfide/foamed nickel electrocatalyst and preparation method thereof

An electrocatalyst, nickel sulfide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., to achieve excellent catalytic hydrogen evolution activity, improve hydrogen evolution reaction performance, and enhance electrical conductivity sexual effect

Inactive Publication Date: 2020-09-29
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore to the amorphous MoO x The simultaneous introduction of heterointerfaces and oxygen vacancies will significantly improve the catalytic performance of the material, but there are no reports on related materials

Method used

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  • Oxygen-deficient molybdenum oxide/nickel sulfide/foamed nickel electrocatalyst and preparation method thereof
  • Oxygen-deficient molybdenum oxide/nickel sulfide/foamed nickel electrocatalyst and preparation method thereof
  • Oxygen-deficient molybdenum oxide/nickel sulfide/foamed nickel electrocatalyst and preparation method thereof

Examples

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preparation example Construction

[0043] The invention provides a method for preparing an oxygen-deficient molybdenum oxide / nickel sulfide / nickel foam electrocatalyst, comprising the following steps:

[0044] Prepare 0.05-0.1mol / L molybdenum-containing compound solution, the solvent is selected from the composition of ethanol and water, wherein the volume ratio of ethanol and water is 1-2:1, and the molybdenum-containing compound is selected from sodium molybdate or molybdenum ammonium acid.

[0045] A sulfur-containing compound is added so that the molar ratio of molybdenum to sulfur is 1:4˜1:6, and the sulfur-containing compound is selected from thiourea or sodium thiosulfate.

[0046]Excessive nickel foam is added, hydrothermal reaction is carried out at 135-145° C. for 16-24 hours, and the oxygen-deficient molybdenum oxide / nickel sulfide / nickel foam electrocatalyst is obtained after cooling to room temperature.

[0047] The present invention is not particularly limited to molybdenum-containing compound, a...

Embodiment 1

[0063]

[0064] 0.483g (2.0mmol) sodium molybdate Na 2 MoO 4 2H 2 O was dissolved in a mixed solution composed of ethanol and deionized water, and the molybdenum-containing compound solution was obtained after magnetic stirring for 30 minutes. mol / L;

[0065] 0.760g (10mmol) thiourea CH 4 N 2 S was added to the molybdenum-containing compound solution, and magnetically stirred for 30 minutes to obtain a precursor solution, so that the molar ratio of molybdenum to sulfur was 1:5.

[0066]

[0067] Put two pieces of 1×2cm pretreated nickel foam and precursor solution into a stainless steel hydrothermal reaction kettle lined with polytetrafluoroethylene, hydrothermally react at 140°C for 18h, and cool to room temperature to obtain the reaction product.

[0068]

[0069] The reaction product oxygen-deficient molybdenum oxide / nickel sulfide / nickel foam was washed three times with deionized water and ethanol, and then dried at 50°C for 12 hours to obtain dry oxygen-defici...

Embodiment 2

[0072] Except that the volume ratio of ethanol and water is 2:1, the rest is the same as that of Example 1.

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Abstract

The invention provides an oxygen-deficient molybdenum oxide / nickel sulfide / foamed nickel electrocatalyst and a preparation method thereof. The method comprises the following steps: preparing a 0.05-0.1 mol / L molybdenum-containing compound solution, selecting a solvent from a composition of ethanol and water, adding a sulfur-containing compound to make the molar ratio of molybdenum to sulfur be 1:4-1: 6, adding excessive foamed nickel, carrying out a hydrothermal reaction at 135-145 DEG C for 16-24 h, and cooling to room temperature to obtain the product. According to the preparation method, oxygen-deficient molybdenum oxide is obtained through a one-step hydrothermal method, meanwhile, part of foamed nickel is vulcanized to obtain nickel sulfide with catalytic activity, and the electrocatalytic activity of the electrocatalyst is synergistically improved; and the amorphous MoOx contains oxygen vacancies due to lower reaction temperature, so that the catalytic performance of the hydrogen evolution reaction of the electrocatalyst is improved.

Description

technical field [0001] The invention relates to the technical field of electrocatalysts, in particular to an oxygen-deficient molybdenum oxide / nickel sulfide / foam nickel electrocatalyst and a preparation method thereof. Background technique [0002] Hydrogen is a clean and renewable new fuel, which is of great significance to replace traditional fossil fuels and realize industrial technology upgrading. The combustion value of hydrogen energy is extremely high, and its combustion product is only H 2 O, will not produce any pollutants and greenhouse gases such as CO 2 . More importantly, hydrogen energy can be obtained directly through the hydrogen evolution reaction of electrolyzed water, and the raw materials are abundant. However, the overpotential of the hydrogen evolution reaction is high, and platinum-based noble metals are usually used as catalysts to reduce the overpotential. However, noble metal catalysts are expensive and resources are scarce, which limits the wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J23/883B01J35/08B01J37/10C25B11/06C25B1/04
CPCB01J27/043B01J23/883B01J37/10C25B1/04B01J35/33B01J35/23B01J35/51Y02E60/36
Inventor 马淑兰于梓洹史可人王征
Owner BEIJING NORMAL UNIVERSITY
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