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A molybdenum-doped iron/nickel layered array@foam nickel-based composite electrode material and its preparation method and application

A composite electrode and nickel foam technology, which is applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of poor stability of the catalyst and achieve the effects of good stability, improved stability, and low energy consumption

Active Publication Date: 2021-02-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst for the hydrogen evolution reaction under alkaline conditions has problems such as poor stability, and further research is needed.

Method used

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  • A molybdenum-doped iron/nickel layered array@foam nickel-based composite electrode material and its preparation method and application
  • A molybdenum-doped iron/nickel layered array@foam nickel-based composite electrode material and its preparation method and application
  • A molybdenum-doped iron/nickel layered array@foam nickel-based composite electrode material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]The molybdenum-doped iron / nickel layered array@foam nickel-based composite electrode material of the present invention specifically includes the following steps:

[0036]a. Take the foamed nickel, cut it into a size of 1cm×3cm, place it in a beaker, add absolute ethanol until it is immersed, pour out the absolute ethanol after sonicating for 15 minutes, add 1mol / L dilute hydrochloric acid until immersed, and rinse with water after sonicating for 15 minutes spare;

[0037]b. Measure 20mL of deionized water and place it in an Erlenmeyer flask, then add 0.45g of ferric nitrate nonahydrate, 0.7g of nickel nitrate hexahydrate, 0.7g of ammonia fluoride, polyethylene glycol (molecular weight 6000), 0.05g, and urea 0.5g, stirred and ultrasonic for 15min, placed in a 25mL high temperature autoclave until completely dissolved, added the foamed nickel treated in step a, and then heated to 120°C for 4h, separated, washed, and dried to obtain FeNi-LDHs grown Layered array of foam nickel (FeNi-LD...

Embodiment 2

[0045]a. Take the foamed nickel, cut it into a size of 1cm×3cm, place it in a beaker, add absolute ethanol until it is immersed, pour out absolute ethanol after 15 minutes of ultrasound, add 1mol / L dilute hydrochloric acid until it is immersed, and rinse with water after 15 minutes of ultrasound spare;

[0046]b. Measure 20 mL of deionized water and place it in an Erlenmeyer flask, then add 0.5 g of ferric nitrate nonahydrate, 0.73 g of nickel nitrate hexahydrate, 0.72 g of ammonia fluoride, polyethylene glycol (molecular weight 6000), 0.1 g, and urea 0.6g, stirred and ultrasonic for 20min, until completely dissolved, placed in a 25mL high temperature autoclave, added the foamed nickel treated in step a, and then heated to 150℃ to react for 5h, separated, washed, and dried to obtain FeNi-LDHs@foam nickel.

[0047]c. Measure 20 mL of deionized water and place it in an Erlenmeyer flask, add 0.0247g of ammonium heptamolybdate, and sonicate to completely dissolve it; immerse the FeNi-LDHs@foa...

Embodiment 3

[0050]a. Take the foamed nickel, cut it into a size of 1cm×3cm, place it in a beaker, add absolute ethanol until it is immersed, pour out absolute ethanol after 15 minutes of ultrasound, add 1mol / L dilute hydrochloric acid until it is immersed, and rinse with water after 15 minutes of ultrasound spare;

[0051]b. Measure 20mL of deionized water and place it in an Erlenmeyer flask, then add 0.55g of ferric nitrate nonahydrate, 0.75g nickel nitrate hexahydrate, 0.75g ammonia fluoride, polyethylene glycol (molecular weight 6000) 0.15g, and urea 0.7g, stirred and ultrasonic for 20min, until completely dissolved, placed in a 25mL high temperature autoclave, added the foamed nickel treated in step a, then heated to 100℃ for 6h, separated, washed, and dried to obtain FeNi-LDHs@foam nickel.

[0052]c. Measure 20mL of deionized water and place it in an Erlenmeyer flask, add 0.0247g of ammonium heptamolybdate, and sonicate until it is completely dissolved; immerse the FeNi-LDHs@foam nickel obtained...

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Abstract

The invention discloses a molybdenum-doped iron / nickel layered array@foam nickel-based composite electrode material and its preparation method and application. An array of double metal hydroxides (FeNi-LDHs) doped with metallic molybdenum. The preparation method adopts the hydrothermal method to directly grow the FeNi-LDHs nanosheet array on the nickel foam substrate, and then uses the FeNi-LDHs array as the substrate to dope metal Mo on the surface by the hydrothermal method, and finally obtains the nanosheet array with high-temperature carbonization and reduction through high-temperature carbonization and reduction. Catalytic electrode materials. The composite material has stable performance under alkaline conditions, has a high degree of reutilization, a large electrochemical active area, and greatly improves the catalytic activity of the material; the preparation method has simple preparation process, low sintering temperature, Low energy consumption, convenient for industrial production.

Description

Technical field[0001]The invention relates to the technical field of electrolytic water catalytic hydrogen evolution, in particular to a molybdenum-doped iron / nickel layered array@foam nickel-based composite electrode material and a preparation method and application thereof.Background technique[0002]Energy, as the cornerstone of various production activities in human society, is the most important driving force for the development of human productivity. Since ancient times, fossil energy has been the main energy used by humans, and its consumption rate has become faster and faster with human development. Especially since entering the industrialized society, the existing storage is about to be exhausted within a few centuries. The consumption of fossil energy has also brought environmental pollution problems. Therefore, the development of sustainable and clean alternative energy sources is a top priority. Since the hydrogen combustion process can release huge energy and the product ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/054C25B11/091C25B11/04C25B1/04
CPCC25B1/04C25B11/04Y02E60/36
Inventor 喻发全李攀王建芝谌伟明薛亚楠蔡宁
Owner WUHAN INSTITUTE OF TECHNOLOGY
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