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Preparation method of binary nickel cobalt selenide nanosheet material

A nanosheet, selenide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low yield, pollute the environment, cumbersome process, etc., achieve high yield, preparation The method is simple and the effect of chemical adsorption is enhanced

Pending Publication Date: 2022-05-24
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional selenide production method is to prepare metal oxides in advance, and then convert the oxides into selenides by wet chemical methods. This method is not only cumbersome, but the yield is low, and a large amount of waste liquid will be left after selenization. polluted environment

Method used

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  • Preparation method of binary nickel cobalt selenide nanosheet material
  • Preparation method of binary nickel cobalt selenide nanosheet material
  • Preparation method of binary nickel cobalt selenide nanosheet material

Examples

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Embodiment 1

[0036] A preparation method of binary nickel cobalt selenide nanosheet material, comprising the following steps:

[0037] (1) 3mmol oxalic acid is placed in 20ml deionized water to carry out magnetic stirring for 5min, and the stirring speed is 600r / min, and then the oxalic acid solution is placed in a supersonicator to carry out ultrasonic dispersion 5min;

[0038] (2) 1mmol nickel nitrate, 2mmol cobalt nitrate are added in 40ml methanol, ultrasonic 5min, magnetic stirring 5min, stirring speed is 600r / min, the pink transparent nitrate solution obtained, wherein the mol ratio of nickel-cobalt ion is 1:2;

[0039] (3) pour the solution prepared in step (2) into the solution prepared in step (1), then stir the mixed solution for 5min to obtain a precursor solution;

[0040] (4) adding the obtained precursor solution in the step (3) into the inner liner of the autoclave, twisting the inner liner and putting it into the outer shell of the autoclave, putting the autoclave into the ...

Embodiment 2

[0044] A preparation method of binary nickel cobalt selenide nanosheet material, comprising the following steps:

[0045](1) 3mmol oxalic acid was placed in 20ml deionized water and carried out magnetic stirring for 5min, and the stirring speed was 700r / min, then the oxalic acid solution was placed in a supersonicator to carry out ultrasonic dispersion 5min;

[0046] (2) 1mmol nickel nitrate, 2mmol cobalt nitrate are added in 40ml methanol, ultrasonic 5min, magnetic stirring 5min, stirring speed is 700r / min, the pink transparent nitrate solution obtained, wherein the mol ratio of nickel-cobalt ion is 1:2;

[0047] (3) pour the solution prepared in step (2) into the solution prepared in step (1), then stir the mixed solution for 5min to obtain a precursor solution;

[0048] (4) adding the obtained precursor solution in the step (3) into the inner liner of the autoclave, twisting the inner liner and putting it into the outer shell of the autoclave, putting the autoclave into the...

Embodiment 3

[0052] A preparation method of binary nickel cobalt selenide nanosheet material, comprising the following steps:

[0053] (1) 3mmol oxalic acid was placed in 20ml deionized water and carried out magnetic stirring for 5min, and the stirring speed was 800r / min, and then the oxalic acid solution was placed in a supersonicator to carry out ultrasonic dispersion 5min;

[0054] (2) 1mmol nickel nitrate, 2mmol cobalt nitrate are added in 40ml methanol, ultrasonic 5min, magnetic stirring 5min, stirring speed is 800r / min, the pink transparent nitrate solution obtained, wherein the mol ratio of nickel-cobalt ion is 1:2;

[0055] (3) pour the solution prepared in step (2) into the solution prepared in step (1), then stir the mixed solution for 5min to obtain a precursor solution;

[0056] (4) adding the obtained precursor solution in the step (3) into the inner liner of the autoclave, twisting the inner liner and putting it into the outer shell of the autoclave, putting the autoclave int...

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Abstract

The invention discloses a preparation method of a binary nickel cobalt selenide nanosheet material, which comprises the following specific steps: by taking nickel nitrate hexahydrate and cobalt nitrate hexahydrate as a nickel source and a cobalt source and taking deionized water and methanol in a proper proportion as solvents, synthesizing a nickel cobalt oxalate precursor nanosheet by adopting a hydrothermal method; and then mixing with selenium powder, and calcining in argon in a tubular furnace to obtain the nickel cobalt selenide nanosheet material. The prepared binary nickel-cobalt selenide nanosheet material is large in specific surface area and high in conductivity, and when the binary nickel-cobalt selenide nanosheet material is used as an electro-catalytic material for oxygen evolution reaction, the electrochemical performance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of electrochemical catalyst material preparation, in particular to a preparation method of a binary nickel-cobalt selenide nanosheet material. Background technique [0002] With the rapid economic development, people's demand for energy is increasing. Due to the non-renewable nature of fossil energy and the pollution to the environment, people are in urgent need of new green energy. Obtaining hydrogen and oxygen by electrolysis of water is a solution that has received extensive attention, but the key factor restricting this solution is the slow kinetics of the oxygen evolution reaction. At present, the main components of the most efficient oxygen evolution electrocatalysts on the market are noble metals and their oxides, but the high price and scarce reserves make it difficult for large-scale industrial application. At present, transition metal oxides have attracted more and more attention due to their adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04B82Y30/00B82Y40/00
CPCC25B11/091C25B1/04B82Y30/00B82Y40/00Y02E60/36
Inventor 张勇姚尚智吴玉程蔡婧怡张雪茹崔接武舒霞王岩秦永强
Owner HEFEI UNIV OF TECH
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