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High-efficiency bimetallic nickel molybdenum selenide electro-catalytic material and preparation method thereof

A metal nickel-molybdenum, selenide electro-technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of small number of active sites, insufficient performance of transition metal molybdenum diselenide, stable problems such as poor performance, to achieve the effect of efficient catalysis, improved catalytic performance, and improved stability

Active Publication Date: 2020-08-07
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the active sites of molybdenum diselenide only exist on the edge of the basal plane, while a large number of sites in the plane are in an inert state and are not used, so the number of active sites is small
[0005] In view of this, it is necessary to study a new type of electrocatalytic material for total water splitting to solve the technical problems of poor stability of noble metal catalysts in the process of electrolyzing water for hydrogen production and insufficient performance of transition metal molybdenum diselenide in alkaline solution.

Method used

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  • High-efficiency bimetallic nickel molybdenum selenide electro-catalytic material and preparation method thereof
  • High-efficiency bimetallic nickel molybdenum selenide electro-catalytic material and preparation method thereof
  • High-efficiency bimetallic nickel molybdenum selenide electro-catalytic material and preparation method thereof

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preparation example Construction

[0036] The preparation method of a kind of high-efficiency bimetallic nickel-molybdenum-selenide electrocatalytic material proposed by the present invention comprises steps:

[0037] S1. Preparation of nickel-molybdenum mixed solution: according to the molar ratio of nickel to molybdenum of 1-3:1-3, nickel source and molybdenum source are added to the solvent containing surfactant, and after stirring and mixing, the obtained Said nickel-molybdenum mixture;

[0038]S2. Preparation of nanowire precursor: transfer the nickel-molybdenum mixture into a reaction vessel filled with nickel foam (Nickel foam, NF) for solvothermal treatment, take out the nickel foam and vacuum-dry it to obtain in-situ growth the nanowire precursor;

[0039] S3, primary calcination: the nanowire precursor is covered with selenium powder, and the first calcination is carried out at 300-500°C in an argon-hydrogen mixed atmosphere to obtain a nickel-molybdenum bimetallic selenide material Ni with a nickel ...

Embodiment 1

[0064] S1, Preparation of nickel-molybdenum mixed solution: Preparation of nickel-molybdenum mixed solution: Take 81.4mg nickel nitrate hexahydrate, 74.1mg ammonium molybdate tetrahydrate (molar ratio Ni:Mo=2:3) and 65mg CTAB dissolved in 30mL solvent B In the aqueous glycol solution, the nickel-molybdenum mixed solution is obtained after magnetic stirring for half an hour;

[0065] S2, preparation of nanowire precursor: transfer the nickel-molybdenum mixture into a clean container with an area of ​​1x3cm 2 In the reaction kettle (50mL) of foamed nickel, put the reaction kettle into an oven, heat it at 160°C for 6 hours and carry out solvent heat treatment, take out the foamed nickel and rinse it several times with ethanol aqueous solution, then put it into a vacuum oven, and heat it at 60 After vacuum drying for 3 hours at °C, the nanowire precursor grown in situ on nickel foam (NF) was obtained;

[0066] S3, calcining: cutting the nanowire precursor into 0.5x1.5 cm 2 The s...

Embodiment 2

[0069] A kind of nickel molybdenum double metal selenide catalytic material Ni of the present invention 0.85 Se-MoSe 2 The preparation method of / NF comprises the steps:

[0070] S1, Preparation of nickel-molybdenum mixed solution: Preparation of nickel-molybdenum mixed solution: Take 81.4mg nickel nitrate hexahydrate, 74.1mg ammonium molybdate tetrahydrate (molar ratio Ni:Mo=2:3) and 65mg CTAB dissolved in 30mL solvent B In the aqueous glycol solution, the nickel-molybdenum mixed solution is obtained after magnetic stirring for half an hour;

[0071] S2, preparation of nanowire precursor: transfer the nickel-molybdenum mixture into a clean container with an area of ​​1x3cm 2 In the reaction kettle (50mL) of foamed nickel, put the reaction kettle into an oven, heat it at 180°C for 6 hours and carry out solvent heat treatment, take out the foamed nickel and rinse it several times with ethanol aqueous solution, then put it into a vacuum oven, and heat it at 60 The nanowire pr...

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Abstract

The invention discloses a preparation method of an efficient bimetallic nickel-molybdenum selenide electrocatalytic material. The preparation method comprises the following steps: preparing a nickel-molybdenum mixed solution according to a molar ratio of nickel to molybdenum of (1-3):(1-3); transferring the nickel-molybdenum mixed solution into a reaction container containing foamed nickel, carrying out solvent heat treatment, taking out the foamed nickel, and carrying out vacuum drying to obtain an in-situ grown nanowire precursor; and covering the nanowire precursor with selenium powder, carrying out primary calcination in an argon-hydrogen mixed atmosphere at 300-500 DEG C, cooling the calcined product, and carrying out secondary calcination in an inert atmosphere at 300-500 DEG C to obtain the nickel-molybdenum bimetallic selenide material NiSe-MoSe2 / NF after phase change. The bimetal nickel molybdenum selenide electro-catalytic material prepared by the invention is of a nanowire structure obtained by in-situ growth, can be directly used as a working electrode and has a large specific surface area; the catalyst has extremely low overpotential for hydrogen production by electrocatalytic water reduction and oxygen production by oxidation, and has good stability.

Description

technical field [0001] The invention relates to the technical field of electrode catalytic materials, in particular to a high-efficiency bimetallic nickel molybdenum selenide total hydrolysis electrocatalytic material and a preparation method thereof. Background technique [0002] Hydrogen is considered to be an ideal future clean energy due to its lightest weight, best thermal conductivity, high ideal calorific value, good combustion performance, non-toxicity, low consumption, high utilization rate and convenient transportation. At present, the main methods of industrial hydrogen production include: 1) hydrogen production from fossil fuels; 2) hydrogen production from industrial by-products; 3) hydrogen production from methanol reforming; 4) hydrogen production from electrolysis of water. [0003] Among them, hydrogen production from fossil fuels is still the most important way, and the first three ways will produce by-products that are not conducive to the environment. Hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/10C25B1/04C25B11/06
CPCB01J27/0573C25B1/04C25B11/057C25B11/091B01J35/33B01J35/61Y02E60/36
Inventor 高小惠奉文帅郭爱敏李实阚姝婷
Owner CENT SOUTH UNIV
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