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Corrosion-resistant ferronickel electrode and preparation method and application thereof

An electrode, nickel-iron technology, applied in the field of corrosion-resistant nickel-iron electrode and its preparation and application, can solve the problems of low corrosion resistance stability, poor activity, stability and corrosion resistance, poor stability, etc. Achieve the effect of improving corrosion resistance, improving activity and stability, and preventing corrosion

Active Publication Date: 2022-07-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively low intrinsic activity, corrosion resistance and stability of nickel foam samples, most of the current research is using foam nickel or iron foam as a substrate to prepare nickel-iron layered oxides by hydrothermal method, electrodeposition method and other methods. However, since the iron element is easily removed during the oxygen evolution reaction, the reaction activity is reduced, and it has poor stability and poor corrosion resistance.
[0005] At present, it has been reported that most of the phases of sulfide electrode materials used in electrolysis of seawater are Co 3 S 4 、Ni 3 S 2 , HgS, MoS 2 etc. exist in the form of crystals, and mixed amorphous and Ni have not been seen 3 S 2 Preparation and Application of Crystal Structure Materials
However, the main material used in industrial electrolysis of water is nickel mesh, which has poor activity, stability and corrosion resistance, and is difficult to apply to industrial large-scale seawater electrolysis.

Method used

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  • Corrosion-resistant ferronickel electrode and preparation method and application thereof
  • Corrosion-resistant ferronickel electrode and preparation method and application thereof
  • Corrosion-resistant ferronickel electrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (1) Cut 0.5cm×0.4cm foamed nickel-iron (iron content is 20%), and ultrasonically sonicate each in acetone, ethanol and deionized water for 20 min in turn to obtain a pretreated foamed nickel-iron substrate.

[0069] (2) Weigh 0.0248 g (0.1 mmol) of sodium thiosulfate and 15 mg of bis-decyl dimethyl ammonium acetate and dissolve in 20 mL of ethylene glycol, and magnetically stir at room temperature for 30 min to dissolve, forming a transparent and colorless solution.

[0070] (3) Transfer the obtained transparent and colorless solution to a 100 mL hydrothermal kettle, place the pretreated foamed nickel-iron substrate in the hydrothermal kettle, tighten the hydrothermal kettle, and place it in a 180°C oven to maintain a constant temperature for 24h;

[0071] (4) After the hydrothermal kettle was cooled down to room temperature, the hydrothermal kettle was taken out and opened, the samples after hydrothermal were cleaned with deionized water and ethanol, and then placed in ...

Embodiment 2

[0077] (1) Cut out 0.5cm×0.4cm foamed nickel-iron (iron content is 40%), and ultrasonically sonicate each in acetone, ethanol and deionized water for 20 min in turn to obtain a pretreated foamed nickel-iron substrate.

[0078] (2) Weigh 0.0248 g (0.1 mmol) of sodium thiosulfate and 15 mg of bis-decyl dimethyl ammonium acetate and dissolve in 20 mL of ethylene glycol, and magnetically stir at room temperature for 30 min to dissolve, forming a transparent and colorless solution.

[0079] (3) Transfer the obtained transparent and colorless solution to a 100 mL hydrothermal kettle, place the pretreated foamed nickel-iron substrate in the hydrothermal kettle, tighten the hydrothermal kettle, and place it in a 180°C oven to maintain a constant temperature for 24h;

[0080] (4) After the hydrothermal kettle was cooled to room temperature, the hydrothermal kettle was taken out and opened, and the sample after hydrothermal was cleaned with deionized water and ethanol, and then placed in...

Embodiment 3

[0084] (1) Cut out 0.5cm×0.4cm foamed nickel-iron (iron content is 60%), and ultrasonically sonicate each in acetone, ethanol and deionized water for 20 min in turn to obtain a pretreated foamed nickel-iron substrate.

[0085] (2) Weigh 0.0248 g (0.1 mmol) of sodium thiosulfate and 15 mg of bis-decyl dimethyl ammonium acetate and dissolve in 20 mL of ethylene glycol, and magnetically stir at room temperature for 30 min to dissolve, forming a transparent and colorless solution.

[0086] (3) Transfer the obtained transparent and colorless solution to a 100 mL hydrothermal kettle, place the pretreated foamed nickel-iron substrate in the hydrothermal kettle, tighten the hydrothermal kettle, and place it in a 180°C oven to maintain a constant temperature for 24h;

[0087] (4) After the hydrothermal kettle was cooled down to room temperature, the hydrothermal kettle was taken out and opened, the samples after hydrothermal were cleaned with deionized water and ethanol, and then placed...

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Abstract

The invention discloses a corrosion-resistant ferronickel electrode and a preparation method and application thereof. The nickel-iron electrode is provided with a foamed nickel-iron substrate and a sulfide ultrathin nanosheet structure which uniformly grows on the foamed nickel-iron substrate; the sulfide ultrathin nanosheet structure is a blended structure of a crystal phase form and an amorphous form, the crystal phase structure is Ni3S2, the amorphous structure is a compact sulfide film, the film has four to six layers of wrinkles, and the thickness of the film is 0.5-0.9 nm. Furthermore, an oxygen evolution reaction performance test is carried out in an alkaline electrolyte, and a two-electrode electrolysis device is assembled to carry out a full water splitting reaction performance test. The nickel-iron electrode provided by the invention has more active sites, larger specific surface area, high electron transmission speed, good electrochemical oxygen evolution performance, higher current density, good corrosion resistance, activity and stability, and wide application, and is suitable for industrial large-scale production of electrolytic water and electrolytic seawater anode materials.

Description

technical field [0001] The invention relates to a nickel-iron electrode with high activity, low cost and corrosion resistance and a preparation method and application thereof. The nickel-iron electrode is a sulfide ultra-thin nano-sheet material, has good electrochemical oxygen evolution performance, and can be used as an electro- Catalytic oxygen evolution material for the production of anode materials for industrial large-scale water electrolysis and seawater electrolysis. Background technique [0002] Most of the current electrolysis technology uses highly pure water, but in fact 96.5% of the water on earth exists in the form of oceans. Therefore, it is very tempting to directly use seawater as a feedstock for efficient electrochemical water splitting. However, achieving this goal is an extremely challenging task. One of the difficulties lies in the higher requirements for anode oxygen evolution materials. In addition to good catalytic activity, anode oxygen evolution m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/075C25B11/061C25B11/052C25B1/04C01G53/11B82Y30/00B82Y40/00
CPCC25B11/031C25B11/075C25B11/061C25B11/052C25B1/04C01G53/11B82Y30/00B82Y40/00C01P2004/64C01P2004/03C01P2004/04C01P2002/72Y02E60/36
Inventor 邓意达韩羽君胡文彬韩晓鹏李纪红郑学荣
Owner TIANJIN UNIV
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