Preparation method and application of self-supporting catalytic electrode

A catalytic electrode, self-supporting technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor process reliability, many preparation steps, and many types of chemicals, so as to achieve no pollutant emission, simple preparation process, and raw materials. Inexpensive effect

Active Publication Date: 2021-06-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above three technical methods have the disadvantages of many types of chemicals used in the preparation process, many preparation steps, and poor process reliability. It is very important to develop a simple, efficient, and green-friendly process to prepare nickel-iron layered double metal hydroxide oxygen evolution electrodes.

Method used

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  • Preparation method and application of self-supporting catalytic electrode
  • Preparation method and application of self-supporting catalytic electrode
  • Preparation method and application of self-supporting catalytic electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare a self-supporting catalytic electrode as follows:

[0038] (1) The ferronickel foam with a mass ratio of nickel to iron of 5:5 was ultrasonically cleaned with an aqueous solution of hydrochloric acid at a concentration of 2 mol / L for 30 minutes to obtain the ferronickel foam after treatment.

[0039] (2) preparation volume fraction is the ethylene glycol aqueous solution of 98%, mixes after adding the concentrated sulfuric acid wherein, the concentration of sulfuric acid in the solution reaches 2mol / L, obtains the sulfuric acid aqueous solution that contains ethylene glycol; Step (1) gained processing The final foamed nickel-iron was immersed in the sulfuric acid aqueous solution containing ethylene glycol for 15 hours, then cleaned with deionized water, and dried in the air to obtain a self-supporting catalytic electrode of nickel-iron layered double metal hydroxide loaded on nickel-iron alloy , recorded as nickel iron hydroxide / nickel iron catalytic electrod...

Embodiment 2

[0048] Prepare a self-supporting catalytic electrode as follows:

[0049] (1) Take nickel-iron foam with a mass ratio of nickel to iron of 5:5, and use 2mol / L concentration of aqueous hydrochloric acid to ultrasonically clean it for 30 minutes to obtain treated foam nickel-iron.

[0050] (2) preparation volume fraction is the ethylene glycol aqueous solution of 98%, after adding concentrated sulfuric acid therein, mix evenly, the concentration of sulfuric acid in the solution reaches 1mol / L, 2mol / L, 5mol / L respectively, obtains containing ethylene glycol different Aqueous solution of sulfuric acid concentration; the ferronickel foam after the treatment obtained in step (1) was immersed in the sulfuric acid aqueous solution containing ethylene glycol for 15 hours, then after cleaning with deionized water, air-dried to obtain a self-supporting catalytic electrode.

[0051] The self-supporting catalytic electrode prepared by the aqueous solution of different sulfuric acid concent...

Embodiment 3

[0053] Prepare a self-supporting catalytic electrode as follows:

[0054] (1) Get nickel-iron foam with a mass ratio of nickel to iron of 5:5, and use 2mol / L concentration of aqueous hydrochloric acid to ultrasonically clean it for 30 minutes to obtain treated foam nickel-iron.

[0055] (2) preparation volume fraction is the ethylene glycol aqueous solution of 98%, mixes after adding the concentrated sulfuric acid wherein, the concentration of sulfuric acid in the solution reaches 2mol / L, obtains the aqueous solution of the different sulfuric acid concentration that contains ethylene glycol; Step (1 ) The foamed ferronickel after the resulting treatment is immersed in the sulfuric acid aqueous solution containing ethylene glycol for 5 hours, 10 hours, 15 hours, and 25 hours respectively, then after cleaning with deionized water, dry in air to obtain a self-supporting catalytic electrode.

[0056] The self-supporting catalytic electrode prepared from the aqueous solution of dif...

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Abstract

The invention discloses a preparation method and application of a self-supporting catalytic electrode, which belong to the technical field of hydrogen and oxygen preparation through water electrolysis. The method comprises the following steps of immersing the ferro-nickel alloy into an acidic aqueous solution containing ethylene glycol, taking out, cleaning, and airing in air. The preparation process is realized through a one-step acid etching method, the preparation process is simple, and production can be carried out only by immersing cleaned foamed ferronickel into an ethylene glycol aqueous solution of sulfuric acid; conditions are mild, safety is high, raw materials are low in price, pollutant emission is avoided, and the prepared electrode has high catalytic oxygen evolution activity, can effectively reduce water electrolysis energy consumption and has batch manufacturing feasibility.

Description

technical field [0001] The invention belongs to the technical field of producing hydrogen and oxygen by electrolyzing water, and in particular relates to a preparation method and application of a self-supporting catalytic electrode. Background technique [0002] With the rapid growth of world energy demand, the total amount of fossil fuels as the main energy is not only limited, but also causes environmental problems such as greenhouse effect and air pollution. Human beings urgently need to develop green and clean energy carriers to replace fossil fuels. Due to the advantages of high mass energy density, wide range of sources, and non-polluting combustion reaction products, hydrogen is considered to be an energy carrier with great potential in the future. At present, most of the hydrogen comes from the steam reforming process of natural gas, coal, and oil, which is accompanied by the emission of a large amount of environmental pollutants. Therefore, the development of zero-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/061C25B11/091C25B11/031C25B1/04C22C19/03C22C38/08C23F1/28B82Y30/00B82Y40/00
CPCC25B1/04C22C19/03C22C38/08C23F1/28B82Y30/00B82Y40/00Y02E60/36
Inventor 王保国王培灿林育群
Owner TSINGHUA UNIV
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