Preparation method of composite nanostructure catalyst based on nickel substrate in-situ etching growth

A composite nanostructure, in-situ etching technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of reducing catalyst stability, bubble damage, etc., to achieve enhanced chemical stability, slow down corrosion, and facilitate repulsion Effect

Active Publication Date: 2022-03-15
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason is that the current methods for preparing hydroxides, phosphides and sulfides of iron, cobalt and nickel are mainly by introducing hydroxide ions or alkaline precipitants, and the supported catalyst will be produced in a large amount under high current density. Bubble breakage, reducing catalyst stability

Method used

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  • Preparation method of composite nanostructure catalyst based on nickel substrate in-situ etching growth
  • Preparation method of composite nanostructure catalyst based on nickel substrate in-situ etching growth
  • Preparation method of composite nanostructure catalyst based on nickel substrate in-situ etching growth

Examples

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Effect test

Embodiment 1

[0034] A kind of preparation method of composite nanostructure catalyst based on in-situ etching growth of nickel substrate, see figure 1 , the operation steps are as follows:

[0035] (1) Preparation of nickel hydroxysulfate: a piece of nickel foam (1*2 square centimeters) is placed flat in a 50 milliliter Teflon-lined stainless steel autoclave, and then added to 30 milliliters of aqueous solution containing 10 mmol per liters of nickel acetate and 50 millimoles per liter of sulfuric acid. Then heated to 140 degrees in a drying oven and kept at this temperature for 6 hours. Then naturally cool to room temperature to obtain green nickel hydroxysulfate, and find that there is no precipitation in the solution. Finally, ultrasonication in water for 15 minutes removes residual ions and unstable substances (see figure 2 a).

[0036] (2) Preparation of ferric hydroxide-nickel hydroxysulfate: the sample obtained in step (1) was placed in a beaker, and 20 milliliters of aqueous s...

Embodiment 2

[0039] A method for preparing a composite nanostructure catalyst based on in-situ etching and growth of a nickel substrate, the operation steps are as follows:

[0040] (1) Preparation of nickel hydroxysulfate: a piece of nickel foam (1*2 square centimeters) is placed flat in a 50 milliliter Teflon-lined stainless steel autoclave, and then added to 30 milliliters of aqueous solution containing 500 millimoles per liter of nickel sulfate and 10 mmol per liter of ammonium sulfate. It was then heated to 120°C in a drying oven and kept at this temperature for 24 hours. Then naturally cool to room temperature to obtain green nickel hydroxysulfate, and find that there is no precipitation in the solution. Finally, ultrasonication in water for 15 minutes removes residual ions and unstable substances.

[0041] (2) Preparation of ferric hydroxide-nickel hydroxysulfate: the sample obtained in step (1) was placed in a beaker, and 20 milliliters of aqueous solution was added, which contai...

Embodiment 3

[0043] A method for preparing a composite nanostructure catalyst based on in-situ etching and growth of a nickel substrate, the operation steps are as follows:

[0044] (1) Preparation of nickel hydroxysulfate: a piece of nickel foam (1*2 square centimeters) is placed flat in a 50 milliliter Teflon-lined stainless steel autoclave, and then added to 30 milliliters of aqueous solution containing 200 millimoles per liter of nickel chloride and 500 millimoles of magnesium sulfate per liter. It was then heated to 130°C in a drying oven and kept at this temperature for 12 hours. Then naturally cool to room temperature to obtain green nickel hydroxysulfate, and find that there is no precipitation in the solution. Finally, ultrasonication in water for 15 minutes removes residual ions and unstable substances.

[0045] (2) Preparation of ruthenium hydroxide-nickel hydroxysulfate: the sample obtained in step (1) was placed in a beaker, and 20 milliliters of aqueous solution was added, ...

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Abstract

The invention relates to a preparation method of a composite nanostructure catalyst, in particular to a preparation method of a composite nanostructure catalyst based on nickel substrate in-situ etching growth and application of the composite nanostructure catalyst in seawater electrolysis. The method comprises the following steps: firstly, adding a cleaned nickel substrate, metal salt A and sulfate into a solvent, and then carrying out solvothermal reaction to obtain a primary sample; and putting the primary product into another metal salt B solution to react for a period of time to obtain the composite nanostructure catalyst. The in-situ etching growth composite nanostructure catalyst shows good catalytic activity and outstanding stability in the aspect of seawater electrolysis, and lays a foundation for development and large-scale application of a seawater electrolysis hydrogen production and oxygen production technology.

Description

technical field [0001] The invention relates to a preparation method of a composite nanostructure catalyst, in particular to a preparation method of a composite nanostructure catalyst based on in-situ etching growth of a nickel substrate and its application in electrolysis of seawater. Background technique [0002] With the continuous growth of social energy demand and the continuous enhancement of people's awareness of environmental protection, it is urgent to develop new environmentally friendly energy sources. Hydrogen is one of the typical environmentally friendly energy sources. It has the advantages of high energy density, cleanliness and pollution-free, so it has attracted extensive attention from researchers. Using electricity generated by renewable energy sources (such as wind energy, solar energy, etc.) to electrolyze water to produce hydrogen can not only obtain high-purity hydrogen, but also the preparation process is environmentally friendly and recyclable. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/054C25B11/061C25B11/091
CPCC25B1/04C25B11/054C25B11/061C25B11/091
Inventor 陆家佳梁汉璞
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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