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Foamed nickel loaded NiFe amorphous nano array electro-catalysis electrode and preparation method thereof

A technology of nano-array and nickel foam, applied in the direction of electrodes, electrode shapes/types, electrolytic components, etc., to achieve the effect of excellent electrocatalytic oxygen evolution performance

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

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a nickel foam supported NiFe amorphous nano-array electrocatalytic electrode and its preparation method to solve or improve at least one of the above-mentioned technical problems

Method used

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  • Foamed nickel loaded NiFe amorphous nano array electro-catalysis electrode and preparation method thereof
  • Foamed nickel loaded NiFe amorphous nano array electro-catalysis electrode and preparation method thereof
  • Foamed nickel loaded NiFe amorphous nano array electro-catalysis electrode and preparation method thereof

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preparation example Construction

[0044] An embodiment of the first aspect of the present invention provides a method for preparing a foamed nickel-supported NiFe amorphous nano-array electrocatalytic electrode, comprising: S1, selecting foamed nickel as a matrix, and pre-processing it; S2, using continuous chemical Deposition method, an amorphous Ni-based coating is formed on the surface of the foamed nickel substrate; S3, a continuous chemical deposition method is used to form an amorphous NiFe-based coating on the surface of the amorphous Ni-based coating; S4, after drying, the foamed nickel-supported NiFe is obtained Hierarchical porous amorphous nanoarray electrocatalytic electrodes.

[0045] The invention provides a method for preparing a foamed nickel-supported NiFe amorphous nano-array electrocatalytic electrode. The NiFe-based plating layer is obtained by using two plating layers. The repeatability between the two operations is high and the repeated implementation is convenient, so that the overall pre...

Embodiment 1

[0074] like Figure 1-3 As shown, in this embodiment, at room temperature, a large piece of nickel foam is used as a substrate, and an amorphous Ni-based plating layer is first chemically deposited on the nickel foam by a bubble template-assisted method. Then, the amorphous NiFe multi-level porous amorphous nano-array coating was chemically deposited on the nickel foam by the bubble template-assisted method to prepare a high-performance oxygen evolution electrocatalyst.

[0075] The above-mentioned method for large-scale preparation of foamed nickel-supported NiFe multi-level porous amorphous nano-array oxygen evolution electrocatalyst at room temperature is carried out according to the following steps.

[0076] (1) First, a large piece of foamed nickel (15cm*30cm) was subjected to ultrasonic treatment in 6M hydrochloric acid, acetone and water in sequence to remove the nickel oxide layer and organic pollutants.

[0077] (2) Immerse the nickel foam in a mixed aqueous solution...

Embodiment 2

[0089] like Figure 4 As shown, in this embodiment, at room temperature, a large piece of nickel foam is used as a substrate, and an amorphous Ni-based plating layer is first chemically deposited on the nickel foam by a bubble template-assisted method. Then, the amorphous NiFe multi-level porous amorphous nano-array coating was chemically deposited on the nickel foam by the bubble template-assisted method to prepare a high-performance oxygen evolution electrocatalyst.

[0090] (1) The pretreatment of the nickel foam substrate and the preparation method of the electrocatalyst are exactly the same as the steps (1)-(10) of Example 1.

[0091] (2) The electrochemical test of this example is carried out in a three-electrode electrolytic cell at room temperature and normal pressure, the counter electrode is a Pt sheet electrode, the reference electrode is an Ag / AgCl electrode, and the working electrode is the foam prepared in this example. NiFe multi-level porous amorphous nanoarra...

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Abstract

The invention discloses a foamed nickel-loaded NiFe amorphous nano array electro-catalysis electrode and a preparation method thereof. The preparation method comprises the following steps: selecting a piece of foamed nickel with a preset size, and performing pretreatment; the pretreated foamed nickel is subjected to plating treatment, so that a Ni-based plating layer is formed on the surface of the foamed nickel; the nickel foam with the Ni-based plating layer is subjected to secondary plating treatment, so that the Ni-based plating layer on the surface is converted into the NiFe-based plating layer, and the multi-level combined porous composite structure of the NiFe multi-level porous amorphous nano array provides fully exposed rich active sites and enhanced charge transfer; and the porous mass transfer channel can be used for high-efficiency ion and bubble transmission, and the foamed nickel loaded NiFe multi-level porous amorphous nano array shows excellent oxygen evolution electrocatalytic activity and ultrahigh stability in alkaline electrolyte, near-neutral electrolyte and alkaline seawater.

Description

technical field [0001] The invention relates to the technical field of electrolysis of water for oxygen production, in particular to a foam nickel-supported NiFe amorphous nanometer array electrocatalytic electrode and a preparation method thereof. Background technique [0002] Since ancient times, energy has been an important material basis and source of power for human survival and development. With the continuous growth of the global population, the energy demand of human society is increasing, and a strong dependence on fossil fuels has been derived. Fossil energy, as a limited non-renewable energy source, will face depletion in the foreseeable future, which undoubtedly poses a severe test for human survival and sustainable economic and social development. After research, it was found that hydrogen energy, biomass energy, tidal energy, solar energy, and wind energy are alternatives to fossil energy, and human demand for green, environmentally friendly and efficient rene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/089C25B11/061C25B11/03C25B1/04
CPCC25B11/089C25B11/061C25B11/03C25B1/04Y02E60/36
Inventor 刘晓芳水江澜于荣海唐武魁邹海涵
Owner BEIHANG UNIV
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