Surface fractal strengthened water electrolysis hydrogen production device and method

A hydrogen production device and water electrolysis technology, applied in the electrolysis process, electrolysis components, cells, etc., can solve the problems of reducing the contact area between the electrolyte and the catalyst, affecting the conductivity of the electrolyte, affecting the catalytic effect, etc., so as to reduce the gas coverage and improve the The effect of electrolysis efficiency

Active Publication Date: 2021-10-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the air bubbles cannot leave the electrode surface quickly, the contact area between the electrolyte and the catalyst will be reduced, which will affect the catalytic effect. A large number of air bubbles in the electrolyte will affect the conductivity of the electrolyte.

Method used

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  • Surface fractal strengthened water electrolysis hydrogen production device and method
  • Surface fractal strengthened water electrolysis hydrogen production device and method
  • Surface fractal strengthened water electrolysis hydrogen production device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] This embodiment provides a water electrolysis hydrogen production device, which includes an anode plate 11 with a first flow channel 12 and a cathode plate 19 with a second flow channel 18 oppositely arranged, from the direction from the anode plate 11 to the cathode plate 19, the anode A first gas diffusion layer 13 , a first catalyst layer 14 , a proton exchange membrane 15 , a second catalyst layer 16 and a second gas diffusion layer 17 are sequentially disposed between the plate 11 and the cathode plate 19 . For the installation positions of the above-mentioned structures, reference may be made to the prior art.

[0087] Wherein the first gas diffusion layer 13 , the second gas diffusion layer 17 , the first catalyst layer 14 and the second catalyst layer 16 are provided with convex-concave structures on opposite sides (surfaces on the left and right sides).

[0088] The above-mentioned convex-concave structure includes a primary fractal structure and a secondary fr...

Embodiment 2

[0092] The difference between this embodiment and embodiment 1 is mainly reflected in the following parts:

[0093] The distance between two adjacent primary protrusions 21 is 5 times the diameter of the bubbles 23 formed during the electrolysis process, and the distance between two adjacent secondary protrusions 22 is twice the diameter of the bubbles 23 formed during the electrolysis process. The diameter of the air bubbles 23 is 0.5 mm. The gas-liquid contact angle of the surface of the secondary protrusion 22 was 50°.

[0094] The first gas diffusion layer 13 is made of expanded screen, and the second gas diffusion layer 17 is made of carbon cloth. Both the first catalyst layer 14 and the second catalyst layer 16 are made of carbon-supported Ru particles.

Embodiment 3

[0096] The difference between this embodiment and embodiment 1 is mainly reflected in the following parts:

[0097] The convex-concave structure has only a first-order fractal structure, and the distance between two adjacent first-order protrusions 21 is one time of the diameter of the bubble 23 formed in the electrolysis process. The diameter of the bubble 23 is 3 mm. The gas-liquid contact angle of the surface of the primary protrusion 21 was 30°.

[0098] The first gas diffusion layer 13 is made of titanium in the form of felt, and the second gas diffusion layer 17 is made of carbon cloth. Both the first catalyst layer 14 and the second catalyst layer 16 are made of carbon-supported Ti particles. The cathode plate 19 and the anode plate 11 are made of graphite, and the inner walls of the anode plate 11 and the cathode plate 19 are provided with ultrasonic generators.

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Abstract

The invention discloses a surface fractal strengthened water electrolysis hydrogen production device and method, and belongs to the technical field of electrolysis hydrogen production. The device comprises an anode plate and a cathode plate, and a first gas diffusion layer, a first catalyst layer, a proton exchange membrane, a second catalyst layer and a second gas diffusion layer are sequentially arranged between the anode plate and the cathode plate in the direction from the anode plate to the cathode plate; and convex-concave structures are arranged on the surface of the first gas diffusion layer and the surface of the second gas diffusion layer, and/or convex-concave structures are arranged on the surface of the first catalyst layer and the surface of the second catalyst layer. The convex-concave structures are arranged, and fractal treatment is performed to achieve hydrophilic and hydrophobic properties, so that separation of bubbles from orifices is facilitated, the gas coverage rate of the surfaces of the catalyst layer and the gas diffusion layer is reduced, the bubbles generated by reaction are promoted to quickly reach a polar plate runner, and the electrolysis efficiency is improved. According to the corresponding method, the water electrolysis hydrogen production device is used for electrolysis.

Description

technical field [0001] The invention relates to the technical field of electrolytic hydrogen production, in particular to a water electrolytic hydrogen production device and method with surface fractal strengthening. Background technique [0002] Due to the trend of inferior crude oil, the shortage of crude oil resources and the upgrading of oil quality required by environmental protection, the demand for hydrogen in refineries continues to increase. And with the continuous advancement of technology, hydrogen energy can provide power sources for more vehicles, and the demand for hydrogen energy will further accelerate. [0003] Hydrogen production methods mainly include coal gasification, steam reforming and electrolysis of water, etc. Among them, electrolysis of water is the easiest method for large-scale application of hydrogen production, and the equipment used is simple, the preparation process is pollution-free, and the purity of the hydrogen produced is relatively high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B9/19C25B1/04
CPCC25B9/19C25B1/04Y02E60/36
Inventor 陈强李毅蔡连波盛维武李小婷魏嘉陈险峰刘茂增赵晓青
Owner CHINA PETROLEUM & CHEM CORP
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