Transition metal selenide electro-catalytic material as well as preparation method and application thereof

A transition metal, selenide electro-technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of high price, unsuitable for large-scale promotion, etc., and achieve the effect of low cost, good application prospects, and rich active sites.

Pending Publication Date: 2022-03-08
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a transition metal selenide electrocatalytic material and its preparation method and application to solve the problem that the existing electrolytic water catalytic materials are expensive and not suitable for large-scale promotion

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  • Transition metal selenide electro-catalytic material as well as preparation method and application thereof
  • Transition metal selenide electro-catalytic material as well as preparation method and application thereof

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preparation example Construction

[0027] The embodiment of the present invention provides a preparation method of a transition metal selenide electrocatalytic material, comprising the following steps:

[0028] S1. Mix the transition metal cation solution and the persulfate ion solution evenly to obtain a mixed solution, take the conductive substrate and place it in the mixed solution, and add ammonia water dropwise under constant temperature stirring, keeping the temperature within the range of 8°C to 26°C, After standing still, take out the conductive substrate, wash it with deionized water for 1-5 times, and perform the first calcination after drying to obtain the precursor;

[0029] S2. Put the precursor and selenium powder in a tube furnace, and perform a second calcination in an inert gas atmosphere or a reducing gas atmosphere to obtain a transition metal selenide electrocatalytic material.

[0030] Specifically, in step S1, the transition metal cation solution includes transition metal-containing chlori...

Embodiment 1

[0044] This embodiment provides a preparation method of a transition metal selenide electrocatalytic material, comprising the following steps:

[0045] 1) Weigh 5g of nickel sulfate and potassium persulfate at a mass ratio of 7:1, dissolve it in 28mL of deionized water, and stir for 10min at 15°C; immerse the carbon fiber paper in the solution for 3min, add 4mL of ammonia water dropwise, and the stirred solution turns dark blue After coloring, let stand for 20 minutes, take out the carbon fiber paper, wash it three times with deionized water, and then dry it; calcinate the dried carbon fiber paper in air at 300°C for 60 minutes to obtain a precursor.

[0046]2) Weigh 0.5g of selenium powder, place the selenium powder and the precursor on two small porcelain boats respectively, and place them in two different temperature zones of the same tube furnace. 8% nitrogen-hydrogen mixed gas is added for heating and heating treatment to obtain transition metal selenide electrocatalytic ...

Embodiment 2

[0048] This embodiment provides a preparation method of a transition metal selenide electrocatalytic material, comprising the following steps:

[0049] 1) Weigh 5g of nickel sulfate and potassium persulfate at a mass ratio of 7:1, dissolve it in 28mL of deionized water, and stir for 10min at 10°C; immerse the carbon fiber paper in the solution for 3min, add 4mL of ammonia water dropwise, and the stirred solution turns dark blue After coloring, let it stand for 20 minutes, take out the carbon fiber paper, wash it three times with deionized water, and then dry it; calcinate the dried carbon fiber paper in air at 300°C for 90 minutes to obtain a precursor.

[0050] 2) Weigh 0.5g of selenium powder, place the selenium powder and the precursor on two small porcelain boats respectively, and place them in two different temperature zones of the same tube furnace. 8% nitrogen-hydrogen mixed gas is added for heating and heating treatment to obtain transition metal selenide electrocataly...

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Abstract

The invention provides a transition metal selenide electro-catalytic material and a preparation method and application thereof.The preparation method comprises the steps that a transition metal cation solution and a persulfate ion solution are mixed to be uniform, a mixed solution is obtained, a conductive substrate is taken and placed in the mixed solution, ammonia water is dropwise added in the stirring state, and the transition metal selenide electro-catalytic material is obtained; after standing, the conductive substrate is taken out for first calcination, and a precursor is obtained; and placing the precursor and selenium powder in a tubular furnace, and carrying out secondary calcination in an inert gas atmosphere or a reducing gas atmosphere to obtain the transition metal selenide electro-catalytic material. The precursor material is prepared through a solution method, then the transition metal selenide electro-catalytic material applied to electro-catalytic hydrogen evolution is obtained through a chemical vapor deposition selenylation method, and the electro-catalytic material has the advantages of being excellent in hydrogen evolution performance, low in cost and the like and is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of electrolytic water catalysis, in particular to a transition metal selenide electrocatalytic material and its preparation method and application. Background technique [0002] With the advancement of industrialization, fossil fuels have brought convenience to human society but also brought harm to human beings. During the combustion of fossil fuels, COx, SOx, NOx and other environmentally unfriendly gases will be discharged. These gases Directly affect the living environment and human physical and mental health. In recent years, more and more scientists have focused their attention on hydrogen energy, thanks to the fact that only water is the product of its combustion, which realizes CO 2 It is a clean, green and environmentally friendly renewable energy source with zero emissions. [0003] Among the existing hydrogen production technologies, the production of hydrogen by electrolysis of water has attrac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/075C25B1/04
CPCC25B11/075C25B1/04Y02E60/36
Inventor 熊时健彭祥严宇娇
Owner WUHAN INSTITUTE OF TECHNOLOGY
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