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Self-source etching preparation method and application of nickel-doped iron oxyhydroxide self-supporting electrode material

An iron oxyhydroxide, self-supporting electrode technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of reducing catalyst conductivity, reducing the number of effective active sites, reducing catalytic activity, etc. Conducive to large-scale preparation and application, good repeatability

Pending Publication Date: 2022-04-05
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently reported nanocatalysts are powdered structures, which need to be made into usable electrodes using adhesives such as Nafion and PVDF.
In this process, the use of adhesives will seriously block the transmission channels of electrons, ions, and gases. On the one hand, it will reduce the conductivity of the catalyst. The number of effective active sites for water oxidation, which in turn reduces the catalytic activity

Method used

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  • Self-source etching preparation method and application of nickel-doped iron oxyhydroxide self-supporting electrode material
  • Self-source etching preparation method and application of nickel-doped iron oxyhydroxide self-supporting electrode material
  • Self-source etching preparation method and application of nickel-doped iron oxyhydroxide self-supporting electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 1.0 mmol of ferric chloride hexahydrate into 40 mL of deionized water and stir for 10 min. Then, the cut and cleaned 1×3cm foamed nickel was placed at the bottom of the reactor, and the evenly stirred solution was poured into the reactor so that the foamed nickel substrate could be completely immersed in the solution, and then sealed. Place in an oven, and undergo low-temperature hydrothermal treatment at 60°C for 12 hours; open the hot water kettle that has been completely cooled to room temperature, add 0.2g of urea, and perform ultrasonic dispersion treatment to dissolve the urea and disperse it evenly, and then seal it; In an oven, undergo a secondary hydrothermal treatment at 120°C for 12 hours; open the hot water kettle after it is completely cooled to room temperature, take out the nickel foam material, and finally obtain a nickel-doped iron oxyhydroxide self-supporting electrode material after washing and drying. (1.0M Fe 3+ / NF).

Embodiment 2

[0033] Add 0.5 mmol of ferric chloride hexahydrate into 40 mL of deionized water and stir for 10 min. Then, the cut and cleaned 1×3cm foamed nickel was placed at the bottom of the reactor, and the evenly stirred solution was poured into the reactor so that the foamed nickel substrate could be completely immersed in the solution, and then sealed. Place in an oven, and undergo low-temperature hydrothermal treatment at 60°C for 12 hours; open the hot water kettle that has been completely cooled to room temperature, add 0.2g of urea, and perform ultrasonic dispersion treatment to dissolve the urea and disperse it evenly, and then seal it; In an oven, undergo a secondary hydrothermal treatment at 120°C for 12 hours; open the hot water kettle after it is completely cooled to room temperature, take out the nickel foam material, and finally obtain a nickel-doped iron oxyhydroxide self-supporting electrode material after washing and drying. (0.5M Fe 3+ / NF).

Embodiment 3

[0035]Add 2 mmol of ferric chloride hexahydrate into 40 mL of deionized water and stir for 10 min. Then, the cut and cleaned 1×3cm foamed nickel was placed at the bottom of the reactor, and the evenly stirred solution was poured into the reactor so that the foamed nickel substrate could be completely immersed in the solution, and then sealed. Place in an oven, and undergo low-temperature hydrothermal treatment at 60°C for 12 hours; open the hot water kettle that has been completely cooled to room temperature, add 0.2g of urea, and perform ultrasonic dispersion treatment to dissolve the urea and disperse it evenly, and then seal it; In an oven, undergo a secondary hydrothermal treatment at 120°C for 12 hours; open the hot water kettle after it is completely cooled to room temperature, take out the nickel foam material, and finally obtain a nickel-doped iron oxyhydroxide self-supporting electrode material after washing and drying. (2.0M Fe 3+ / NF).

[0036] The structural test...

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Abstract

The invention belongs to the technical field of electrocatalytic materials, and discloses a self-source etching preparation method and application of a nickel-doped iron oxyhydroxide self-supporting electrode material. The method comprises the following steps: by taking a common foamed nickel substrate as a nickel source, carrying out Fe < 3 + > hydrolysis etching under a low-temperature hydrothermal condition, and then carrying out a secondary hydrothermal precipitation process to obtain the nickel-doped FeOOH catalyst on the in-situ grown foamed nickel substrate. By virtue of the three-dimensional self-supporting structure, the charge transfer resistance can be reduced, the exposed number of active sites of the catalyst is greatly increased, and the material shows relatively excellent electrocatalytic activity when being used for electrocatalytic water oxidation. In addition, the technology is green and environment-friendly, the raw materials used in the technology are cheap and easily available, the treatment time is short, the reaction is mild, the energy consumption is low, and the method has very high application value and very good application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and relates to a self-etching preparation method of a nickel-doped iron oxyhydroxide self-supporting electrode material, and its specific application direction is electrocatalytic water oxidation. Background technique [0002] In order to solve environmental problems such as global energy demand and climate change caused by excessive use of fossil fuels, it is urgent to develop sustainable, clean and efficient clean energy, hydrogen (H 2 ) due to its high energy density (142MJ kg -1 ), a wide range of sources and processes with zero carbon emissions are considered to be a promising alternative energy carrier. Among them, the electrochemical water splitting method has the advantages of environmental friendliness, high yield, and high product purity, and is a very simple method for hydrogen production. Electrochemical water splitting involves two half-reactions, the hydrogen ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B11/031C25B11/054C25B11/061C25B1/04
CPCY02E60/36
Inventor 李华明王照龙许晖莫曌
Owner JIANGSU UNIV
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