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Preparation method of iron-nickel hydrotalcite structure nanosheet for oxygen evolution reaction

An iron-nickel hydrotalcite and oxygen evolution reaction technology is applied in the preparation of graphene-like two-dimensional nanomaterials, and the field of graphene-like two-dimensional materials can solve the problems of poor stability, high overpotential, low current density, etc. Mild conditions, simple operation, good dispersion effect

Inactive Publication Date: 2017-02-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to synthesize high-yield, high-quality iron-nickel hydrotalcite structure nanosheets to solve the problems of low current density, high overpotential and poor stability in existing catalysts

Method used

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  • Preparation method of iron-nickel hydrotalcite structure nanosheet for oxygen evolution reaction
  • Preparation method of iron-nickel hydrotalcite structure nanosheet for oxygen evolution reaction
  • Preparation method of iron-nickel hydrotalcite structure nanosheet for oxygen evolution reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Dissolve 1.6 g of nickel chloride and 0.2 g of ferrous oxalate in 80 mL of deionized water, add 0.3 g of sodium tartrate and 3.2 g of potassium hydroxide and continue stirring for 15 to 20 minutes to form a clear solution.

[0024] (2) The solution obtained in step (1) was transferred to a glass vessel, heated and reacted for 30 minutes under the condition of microwave power of 500W, condensed and refluxed, and naturally cooled to room temperature after the reaction was completed.

[0025] (3) Wash the material obtained in the previous step with deionized water and absolute ethanol successively, and then put it into a vacuum drying oven to dry to obtain iron-nickel hydrotalcite structure nanosheets.

[0026] (4) The material synthesized in the previous step is used as a catalytic material for electrolysis of water (oxygen evolution reaction), and the material is dispersed in a mixed solution and nafion, and the ratio of the mixed solution to nafion in the mixed solut...

Embodiment 2

[0029] (1) Dissolve 2.1g of nickel nitrate and 0.3g of ferrous sulfate in a mixed solvent of 60mL of water and 40mL of ethylene glycol, add 1.1g of sodium dodecylbenzenesulfonate and 3.2g of sodium hydroxide to continue Stir for 15-20 minutes to form a clear solution.

[0030] (2) The solution obtained in step (1) was transferred to a glass vessel, heated and reacted at a microwave power of 700W for 15 minutes, condensed and refluxed, and naturally cooled to room temperature after the reaction was completed.

[0031] (3) Wash the material obtained in the previous step with deionized water and absolute ethanol successively, and then put it into a vacuum drying oven to dry to obtain iron-nickel hydrotalcite structure nanosheets.

[0032] (4) The material synthesized in the previous step is used as a catalytic material for electrolysis of water (oxygen evolution reaction), and the material is dispersed in a mixed solution and nafion, and the ratio of the mixed solution and nafion...

Embodiment 3

[0034] (1) Dissolve 2.8g of nickel sulfate and 0.6g of ferrous chloride in a mixed solvent of 30mL of water and 75mL of ethanol, add 0.8g of trisodium citrate and 3.2g of urea and continue stirring for 15 to 20 minutes to form a clear solution .

[0035] (2) The solution obtained in step (1) was transferred to a glass vessel, heated and reacted for 120 minutes at a microwave power of 600W, condensed and refluxed, and naturally cooled to room temperature after the reaction was completed.

[0036] (3) Wash the material obtained in the previous step with deionized water and absolute ethanol successively, and then put it into a vacuum drying oven to dry to obtain iron-nickel hydrotalcite structure nanosheets.

[0037] (4) The material synthesized in the previous step was used as a catalytic material for electrolysis of water (oxygen evolution reaction), and the material was dispersed in a mixed solution and nafion, and the ratio of the mixed solution to nafion in the mixed solutio...

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Abstract

The invention discloses a preparation method of an oxygen evolution reaction catalyst material iron-nickel hydrotalcite structure nanosheet. The method comprises the steps of dissolving an iron source compound and a nickel source compound into a hydrophilic solution; adding an organic sodium salt and an alkaline reagent and further stirring to form a clear solution; and carrying out reflux condensation under microwave heating, naturally cooling the solution to a room temperature, carrying out centrifugal washing and then carrying out separating and vacuum drying to obtain the iron-nickel hydrotalcite structure nanosheet. By adopting the method of reflux condensation under microwave heating, the preparation method is simple, easy to operate, low in cost and friendly to environment; special equipment is not needed in the overall reaction process; industrial production is facilitated; and the finally obtained product is relatively high in quality. According to the iron-nickel hydrotalcite structure nanosheet prepared by the method, the advantages that the material conductivity is high, active sites are multiple and the electrocatalytic activity is high can be simultaneously achieved. The prepared material is an ideal oxygen evolution reaction catalytic material with a wide commercial application prospect.

Description

technical field [0001] The invention specifically relates to the preparation of two-dimensional graphene-like materials and iron-nickel hydrotalcite structure nanomaterials, and belongs to the fields of preparation technology of two-dimensional graphene-like nanomaterials and application of electrocatalytic materials. Background technique [0002] Electrocatalytic reactions are inseparable from the development of energy, and electrocatalytic reactions are directly related to fuel cells, lithium-air batteries, and water electrolysis. These reactions are green and efficient means of energy production or energy storage, which fully meet the requirements of modern development for energy. Oxygen evolution reaction, as an important half-reaction of electrocatalytic reactions, is a hot research topic today. [0003] In the early stage of oxygen evolution reaction catalyst research, the main focus is on precious metal materials such as Ru, Ir, and Pt. The high cost of noble metal m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88B01J37/04B82Y30/00B82Y40/00
CPCB01J37/04B82Y30/00B82Y40/00H01M4/88Y02E60/50
Inventor 曹传宝乔辰吴宇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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