Preparation method of porous alloy electrode and application thereof

An alloy electrode, alloy technology, applied in electrodes, chemical instruments and methods, electrolysis process, etc., can solve the problems of inability to effectively deal with the microplastic crisis, fiber and microplastics are prone to breakage, and microplastic pollution is aggravated, and reduce hydrogen evolution. Overpotential, promoting electron transfer, reducing the effect of hydrogen embrittlement

Active Publication Date: 2021-11-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Fiber microplastics have been proved to be the main microplastic pollutants in the water environment in a large number of studies. These fiber microplastics are not only from the damage and degradation of fishing lines and fishing nets discarded in the water environment (secondary microplastics). , more from the shedding of tiny fibers (primary microplastics) in the washing and care process of synthetic fiber fabrics. However, fiber microplastics are more likely to be broken in various environments, resulting in the release of a large amount of secondary microplastics, which further increases the pollution of microplastics. exacerbated
[0005] Microplastic pollution is a serious threat to global ecological security, but existing technologies cannot effectively deal with the microplastic crisis, and a high-efficiency and low-energy-consumption technology is urgently needed to degrade it
Widely distributed microplastics are widely distributed in water bodies, and participate in the reaction during the hydrogen evolution process of electrolyzed water, causing a large number of side reactions to affect the efficiency of hydrogen evolution and increase the energy consumption of hydrogen evolution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the preparation method of the present embodiment porous alloy electrode is as follows:

[0023] (1) Add the above-mentioned powders into the vacuum ball milling tank with a mass percentage of 75% Al powder, 12.5% ​​Ni powder, 10% Cu powder, 2% P powder, and 0.5% La powder, and feed N 2 , put the ball mill jar into the ball mill, the mass ratio of balls to materials is 5:1, the number of revolutions is 100r / min, every 30 minutes of operation, the gap is 10 minutes, and the total time is 120 minutes;

[0024] (2) Use an isostatic press to press, put the mixed material into a mold with a diameter of 15mm, and press it at 20MPa for 20 minutes to form a rough embryo with a diameter of 15mm. Place the rough embryo in a corundum crucible, and then place it in a vacuum high-frequency induction Melt in a melting furnace, keep warm at 900°C for 3 hours in an Ar atmosphere, take out the smelted alloy and cool it, then wire cut it into 1cm 3 Small cube blocks, polish...

Embodiment 2

[0030] Embodiment 2: the preparation method of the present embodiment porous alloy electrode is as follows:

[0031] (1) Add the above powders into the vacuum ball milling tank with a mass percentage of 55% Al powder, 25% Ni powder, 15% Cu powder, 4% P powder, and 1% La powder, and feed N 2 , put the ball mill jar into the ball mill, the mass ratio of balls to materials is 4:1, the number of revolutions is 150r / min, every 20 minutes of operation, the gap is 15 minutes, and the total time is 110 minutes;

[0032] (2) Use an isostatic press to press, put the mixed material into a mold with a diameter of 15mm, and press it at 15MPa for 30 minutes to form a rough embryo with a diameter of 15mm. Place the rough embryo in a corundum crucible, and then place it in a vacuum high-frequency induction Melted in a melting furnace, kept in an Ar atmosphere at 900°C for 4 hours, took out the smelted alloy and cooled it, and wire-cut it into 1cm 3 Small cube blocks, polished surface oxide l...

Embodiment 3

[0038] Embodiment 3: the preparation method of the present embodiment porous alloy electrode is as follows:

[0039] (1) Add the above-mentioned powders into the vacuum ball milling tank with the mass percentage of 75% Al powder, 7.5% Ni powder, 13.7% Cu powder, 3% P powder, and 0.8% La powder, and feed N 2 , put the ball mill jar into the ball mill, the mass ratio of balls to materials is 6:1, the number of revolutions is 100r / min, every 30 minutes of operation, the gap is 12 minutes, and the total time is 100 minutes;

[0040] (2) Use an isostatic press to press, put the mixed material into a mold with a diameter of 15mm, and press it at 18MPa for 25 minutes to form a rough embryo with a diameter of 15mm. Place the rough embryo in a corundum crucible, and then place it in a vacuum high-frequency induction Melted in a melting furnace, kept in an Ar atmosphere at 900°C for 4 hours, took out the smelted alloy and cooled it, and wire-cut it into 1cm 3 Small cube blocks, polishe...

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PUM

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Abstract

The invention discloses a preparation method of a porous alloy electrode, which is characterized in that a Ni-Cu-La-P porous alloy electrode is prepared by adopting a dealloying method, loading nano gamma-Fe2O3 on the porous alloy electrode by adopting a dispensing method, and then loading a photocatalyst on the surface of the electrode by adopting an electro-deposition method; the prepared porous alloy electrode is applied to treatment of organic wastewater containing micro-plastics and reduction of hydrogen evolution overpotential under the illumination condition, the hydrogen evolution overpotential of a water electrolysis cathode can be obviously reduced, the micro-plastics and organic pollutants in water can be removed, the removal rate is 90% or above, the preparation process is simple and easy to operate, the electrode is convenient to use, and the method is suitable for industrial production and market popularization and application.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by electrolysis of water, and in particular relates to a preparation method of a porous alloy electrode and its application in treating organic waste water containing microplastics and reducing the hydrogen evolution overpotential under light conditions. Background technique [0002] In terms of thermodynamics, the theoretical voltage of water electrolysis is 1.23V, but in reality, due to factors such as excessive hydrogen evolution overpotential at the cathode, the actual voltage of electrolyzed water is greater than the theoretical voltage. The key to realizing large-scale hydrogen production by electrolyzing water is to reduce electrolysis energy consumption, Reduce the hydrogen evolution overpotential. [0003] In order to reduce the hydrogen evolution overpotential, there are usually two ways to screen excellent electrode materials and increase the electrode surface area. The nob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/061C25B11/091C25B1/04C02F1/461C02F1/30C22C21/00C22C21/12C22C1/02C22C3/00C25D9/04
CPCC25B11/031C25B11/061C25B11/091C25B1/04C02F1/46109C02F1/30C22C21/00C22C21/12C22C1/026C22C3/00C25D9/04C02F2001/46142Y02E60/36
Inventor 瞿广飞季炜潘科衡汤慧敏李应丽
Owner KUNMING UNIV OF SCI & TECH
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