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Method for preparing self-supporting nickel-cobalt-iron hydrotalcite-based catalyst through one-step wet etching

A self-supporting, catalyst technology, used in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of high cost and scarcity of precious metal-based catalysts, restrict development and application, etc., and achieve rapid electron transfer, low cost, and oxygen evolution effect. Good results

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost and scarcity of noble metal-based catalysts greatly limit their development and application in the field of new energy

Method used

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  • Method for preparing self-supporting nickel-cobalt-iron hydrotalcite-based catalyst through one-step wet etching
  • Method for preparing self-supporting nickel-cobalt-iron hydrotalcite-based catalyst through one-step wet etching
  • Method for preparing self-supporting nickel-cobalt-iron hydrotalcite-based catalyst through one-step wet etching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step (1): Foam nickel pretreatment

[0042]Nickel foam (2×5 cm) was sonicated with acetone, hydrochloric acid, ethanol and deionized water for 20 minutes to remove impurities.

[0043] Step (2): Precursor preparation

[0044] At room temperature, 1.8mmol (0.5220g) of Co(NO 3 ) 2 ·6H 2 O and 0.2mmol (0.0808g) of Fe(NO 3 ) 3 9H 2 O and 10mmol (0.37g) of NH 4 F, 10mmol (0.6006g) of CO (NO 2 ) 2 Dissolve in 50ml deionized water and stir for 10 minutes to obtain a precursor solution.

[0045] Step (3): Hydrothermal reaction

[0046] The precursor solution in step (2) is transferred in the stainless steel autoclave of liner polytetrafluoroethylene of 100ml, the foamed nickel processed in step (1) is put into the precursor solution and sealed stainless steel autoclave, it is Put it into an oven and react at 95°C for 8 hours.

[0047] Step (4): Wash and dry

[0048] After the hydrothermal reaction in step (3) is completed, the nickel foam is taken out, rinsed with ...

Embodiment 2

[0053] Step (1): Foam nickel pretreatment

[0054] Nickel foam (2×5 cm) was sonicated with acetone, hydrochloric acid, ethanol and deionized water for 20 minutes to remove impurities.

[0055] Step (2): Precursor preparation

[0056] At room temperature, 1.0mmol (0.2910g) of Co(NO 3 ) 2 ·6H 2 O and 1.0mmol (0.4040g) of Fe(NO 3 ) 3 9H 2 O and 10mmol (0.37g) of NH 4 F, 10mmol (0.6006g) of CO (NO 2 ) 2 Dissolve in 50ml deionized water and stir for 10 minutes to obtain a precursor solution.

[0057] Step (3): Hydrothermal reaction

[0058] The solution in the step (2) is transferred to a stainless steel autoclave lined with polytetrafluoroethylene in 100ml, the nickel foam processed in the step (1) is put into the precursor solution, and the stainless steel autoclave is sealed, and it is placed Put it into an oven and react at a temperature of 95°C for 8 hours.

[0059] Step (4): Wash and dry

[0060] After the reaction of step (3) is completed, the nickel foam is tak...

Embodiment 3

[0065] Step (1): Foam nickel pretreatment

[0066] Nickel foam (2×5 cm) was sonicated with acetone, hydrochloric acid, ethanol and deionized water for 20 minutes to remove impurities.

[0067] Step (2): Precursor preparation

[0068] At room temperature, 0.2mmol (0.0580g) of Co(NO 3 ) 2 ·6H 2 O and 1.8mmol (0.7272g) of Fe(NO 3 ) 3 9H 2 O and 10mmol (0.37g) of NH 4 F, 10mmol (0.6006g) of CO (NO 2 ) 2 Dissolve in 50ml deionized water and stir for 10 minutes to obtain a precursor solution.

[0069] Step (3): Hydrothermal reaction

[0070] Transfer the solution in step (3) to a 100ml polytetrafluoroethylene autoclave, put the nickel foam treated in step (1) into the solution and seal the autoclave, put it into an oven and react at 95°C 8 hours.

[0071] Step (4): Wash and dry

[0072] After the hydrothermal reaction of step (3) is completed, the nickel foam is taken out, rinsed several times with deionized water, and then dried at 60° for 6 hours to obtain Ni x co 9...

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Abstract

The invention discloses a method for preparing a self-supporting nickel-cobalt-iron hydrotalcite-based catalyst through one-step wet chemical etching. The method comprises the following steps: (1) carrying out ultrasonic treatment on foamed nickel in acetone, hydrochloric acid, ethanol and deionized water for 20 minutes respectively; (2) dissolving Co (NO3) 2.6 H2O and Fe (NO3) 3.9 H2O in different molar ratios, 10 mmol of NH4F and 10 mmol of CO (NO2) 2 in 50 mL of deionized water, and stirring for 10 minutes to obtain a precursor solution; (3) transferring the precursor solution into a 100mL stainless steel high-pressure kettle lined with polytetrafluoroethylene, putting foamed nickel into the precursor solution, sealing the stainless steel high-pressure kettle, then putting the stainless steel high-pressure kettle into a drying oven, and reacting at 95 DEG C for 8 hours; (4) after the reaction is finished, naturally cooling to room temperature, taking out foamed nickel, and repeatedly washing the foamed nickel with deionized water to obtain a NiCoFeLDH / NF catalyst; and (5) placing the NiCoFe LDH / NF catalyst in a drying oven at 60 DEG C, and drying to obtain the NiCoFe LDH / NF catalyst. The method is simple to operate, low in cost, good in material stability, environment-friendly and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic water decomposition and oxygen evolution materials, and in particular relates to a method for preparing a self-supporting nickel-cobalt-iron hydrotalcite-based catalyst by one-step wet chemical etching. Background technique [0002] In recent years, countries around the world have developed rapidly in science and technology, and the population has continued to rise. At the same time, human beings' continuous absorption of fossil energy has led to the depletion of global energy, which has triggered a series of ecological and environmental problems such as global warming. In order to solve the above problems, many research topics have focused on the field of clean energy development. Among them, electrolyzed water has no toxic and harmful by-products in the whole preparation process, so this technology provides an effective way for the development of renewable energy. way of the future. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/075C25B1/04
Inventor 夏禹周王鑫张潇予周延珅李瑞康何盈盈
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