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Preparation method of ferro-nickel bi-metal hydroxide of sheet structure on foamed nickel through in-situ growth

An in-situ growth, hydroxide technology, applied in the field of electrocatalysis, can solve the problems of low reserves, high price of precious metal catalysts, hindering the commercialization process of electrolyzed water, etc., and achieve the effect of good stability and high catalytic activity.

Inactive Publication Date: 2018-07-17
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In response to the current increasingly serious energy crisis and environmental crisis, hydrogen and oxygen production by electrolysis of water is one of the effective methods to solve such problems. Due to the high price and low reserves of precious metal catalysts, the commercialization of electrolysis of water has been seriously hindered.

Method used

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  • Preparation method of ferro-nickel bi-metal hydroxide of sheet structure on foamed nickel through in-situ growth
  • Preparation method of ferro-nickel bi-metal hydroxide of sheet structure on foamed nickel through in-situ growth
  • Preparation method of ferro-nickel bi-metal hydroxide of sheet structure on foamed nickel through in-situ growth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Weigh 1.163g of nickel nitrate hexahydrate, 0.1616g of ferric nitrate nonahydrate, 1.2g of urea, and 0.296g of ammonium fluoride and dissolve them in 80mL of deionized water. Processed under the effect of a magnetic stirrer for 30 minutes to obtain a homogeneous solution;

[0021] 2) Cut out 1cm*5cm foam nickel, wash in acetone, ethanol and distilled water for 30 minutes;

[0022] 3) Transfer the solution configured in step 1 to a 100ml high-pressure reactor, then insert the washed nickel foam vertically into the solution, and put the reactor into a 120-degree oven to react for 12 hours;

[0023] 4) After the reaction kettle is cooled to room temperature, take out the foamed nickel. At this time, the foamed nickel changes from silver to yellow-green, ultrasonically wash with ethanol and distilled water, and dry to obtain the in-situ growth on the foamed nickel with a flaky structure. Double metal hydroxide;

[0024] 5) The OER catalytic activity of the above produc...

Embodiment 2

[0026] 1) Weigh 1.018g of nickel nitrate hexahydrate, 0.3232g of ferric nitrate nonahydrate, 1.2g of urea, and 0.296g of ammonium fluoride and dissolve them in 80mL of deionized water. Processed under the effect of a magnetic stirrer for 30 minutes to obtain a homogeneous solution;

[0027] 2) Cut out 1cm*5cm foam nickel, wash in acetone, ethanol and distilled water for 30 minutes;

[0028] 3) Transfer the solution configured in step 1 to a 100ml high-pressure reactor, then insert the washed nickel foam vertically into the solution, and put the reactor into a 120-degree oven to react for 12 hours;

[0029] 4) After the reaction kettle is cooled to room temperature, take out the foamed nickel. At this time, the foamed nickel changes from silver to yellow-green, ultrasonically wash with ethanol and distilled water, and dry to obtain the nickel-iron with a flaky structure grown on the foamed nickel in situ. Double metal hydroxide;

[0030] 5) The OER catalytic activity of the a...

Embodiment 3

[0032] 1) Weigh 1.163g of nickel nitrate hexahydrate, 0.4848g of ferric nitrate nonahydrate, 1.2g of urea, and 0.296g of ammonium fluoride and dissolve them in 80mL of deionized water. Processed under the effect of a magnetic stirrer for 30 minutes to obtain a homogeneous solution;

[0033] 2) Cut out 1cm*5cm foam nickel, wash in acetone, ethanol and distilled water for 30 minutes;

[0034] 3) Transfer the solution configured in step 1 to a 100ml high-pressure reactor, then insert the washed nickel foam vertically into the solution, and put the reactor into a 120-degree oven to react for 12 hours;

[0035] 4) After the reaction kettle is cooled to room temperature, take out the foamed nickel. At this time, the foamed nickel changes from silver to yellow-green, ultrasonically wash with ethanol and distilled water, and dry to obtain the nickel-iron with a flaky structure grown on the foamed nickel in situ. Double metal hydroxide;

[0036] 5) The OER catalytic activity of the a...

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Abstract

The invention discloses a preparation method of a ferro-nickel bi-metal hydroxide of a sheet structure on foamed nickel through in-situ growth, and belongs to the field of electrochemistry. Nickel nitrate hexahydrate, iron nitrate nonahydrate, urea, ammonium fluoride and foamed nickel are adopted as main raw materials, and an electrocatalyst through water electrolysis oxygen production is successfully prepared. The sheet structure of the catalyst supplies abundant active sites, due to existence of substrate foamed nickel, the electrical conductivity is enhanced, and when the hydroxide is adopted as the electro-catalysis oxygen production catalyst, the excellent catalysis activity is shown. The activity of a traditional non-noble metal material under an oxygen evolution reaction (OER) in analkaline electrolyte is not ideal. Accordingly, the OER catalysis performance of the non-noble metal material under the alkaline condition is improved, and the method is of great significance in solving the fossil fuel energy crisis. Nickel and iron earth reserve volumes are quite abundant, the OER catalytic performance of the ferro-nickel bi-metal hydroxide of the sheet structure under the alkaline condition is excellent, and the hydroxide is a catalytic material with the wide prospect.

Description

technical field [0001] The invention belongs to the field of electrocatalysis, and in particular relates to a method for preparing an oxygen evolution reaction catalyst of nickel-iron double metal hydroxide with sheet-like structure grown on foamed nickel in situ. Background technique [0002] In response to the increasingly serious energy crisis and environmental crisis, electrolysis of water to produce hydrogen and oxygen is one of the effective methods to solve such problems. The high price and low reserves of precious metal catalysts seriously hinder the commercialization of electrolysis of water. Research shows that by controlling the morphology and structure of non-noble metal nanoparticles, the catalytic activity can be effectively improved, which has the potential to replace noble metal catalysts, but there is still a certain distance from noble metal catalysts. Therefore, improving the catalytic activity of non-noble metal catalysts is an important issue. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C25B1/04C25B11/06
CPCB01J23/755C25B1/04C25B11/04Y02E60/36
Inventor 杨东江邹译慧张威佘希林
Owner QINGDAO UNIV
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