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Hydrogen-production and on-line separation device for decomposing water by optical electrolytic cell

A separation device and water hydrogen production technology, applied in electrolysis process, electrolysis components, light water/sewage treatment, etc., can solve the problems of no semiconductor material found, less optimal design of photoelectrolytic cell structure, etc., so as to save post-processing steps, Effective use of the illuminated area and the effect of avoiding corrosion

Active Publication Date: 2014-09-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the production of hydrogen by photolysis of water is still in the basic research stage, and domestic and foreign countries are working on the development of high-efficiency catalysts. However, in the process of experiments and future applications, there will be such a problem: how to reduce the gas produced by the photoelectrolysis cell during continuous operation online separation
[0005] However, there are still relatively few studies on the optimal design of the photoelectrolytic cell structure.
This is mainly due to the fact that photoelectrolysis of water to produce hydrogen is still in the basic research stage, so far no feasible semiconductor material has been found to make the photoelectric conversion efficiency reach the level of industrialization

Method used

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  • Hydrogen-production and on-line separation device for decomposing water by optical electrolytic cell
  • Hydrogen-production and on-line separation device for decomposing water by optical electrolytic cell
  • Hydrogen-production and on-line separation device for decomposing water by optical electrolytic cell

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Experimental program
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Effect test

specific Embodiment approach

[0050] Its specific implementation is as follows:

[0051] 1) Titanium dioxide nanotube photoanode integrated with titanium dioxide and substrate was prepared by pure titanium mesh.

[0052] The pure titanium mesh is used as the anode, the graphite electrode or the Pt sheet electrode is used as the cathode, placed in the reactor, and a certain distance (4cm) is kept between the two electrodes, and the electrolyte solution contains NH 4 The ethylene glycol (89.5wt%) water (10wt%) solution of F (0.5wt%), copper wire is done lead wire and two electrodes are connected on the two poles of DC stabilized voltage power supply, start reaction, and regulating voltage is 30V. After reacting for 4 h, the reaction was terminated. The prepared titanium mesh was baked in a muffle furnace at 450° C. for 120 minutes, and the titanium dioxide nanotube photoanode was obtained after natural cooling.

[0053] 2) Pressing of the membrane electrode assembly.

[0054] Take commercial Pt / C carbon p...

Embodiment 2

[0065] Its specific implementation is as follows:

[0066] 1) Titanium dioxide nanotube photoanode integrated with titanium dioxide and substrate was prepared by pure titanium mesh.

[0067] The pure titanium mesh is used as the anode, the graphite electrode or the Pt sheet electrode is used as the cathode, placed in the reactor, and a certain distance (4cm) is kept between the two electrodes, and the electrolyte solution contains NH 4 The ethylene glycol aqueous solution of F, the copper wire is used as the wire to connect the two electrodes to the DC regulated power supply, and the reaction starts, and the voltage is adjusted to 30V. After reacting for 1 h, the reaction was terminated. The prepared titanium mesh is placed in a muffle furnace for calcination, 120min at 650°C, and after natural cooling, the titanium dioxide nanotube photoanode can be obtained, and the calcined TiO 2 The surface morphology of the nanoarrays is as Figure 9 shown.

[0068] 2) Pressing of the...

Embodiment 3

[0074] Its specific implementation is as follows:

[0075] 1) Titanium dioxide nanotube photoanode integrated with titanium dioxide and substrate was prepared by pure titanium mesh.

[0076] The pure titanium mesh is used as the anode, the graphite electrode or the Pt sheet electrode is used as the cathode, placed in the reactor, and a certain distance is kept between the two electrodes, and the electrolyte solution contains NH 4 The ethylene glycol (89.5wt%) water (10wt%) solution of F (0.5wt%), copper wire is done lead wire and two electrodes are connected on the direct-current stabilized voltage power supply, starts to react, and regulation voltage is 30V. After reacting for 1 h, the reaction was terminated. The prepared titanium mesh was baked in a muffle furnace at 450° C. for 120 minutes, and the titanium dioxide nanotube photoanode was obtained after natural cooling.

[0077] 2) Pressing of the membrane electrode assembly.

[0078] Take commercial Pt / C carbon paper e...

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Abstract

The invention relates to a new type of photoelectrolytic cell structure, which is improved on the basis of the three-electrode system, and a membrane electrode assembly is used inside, wherein the middle membrane layer is a solid polymer alkaline membrane. The invention can directly separate hydrogen and oxygen generated by photoelectric water splitting on-line, avoiding the post-treatment process of hydrogen and oxygen separation in traditional devices, increasing the safety of the system, and greatly saving energy consumption, and the structure has good stability sex. The new photoelectrolytic cell has a compact structure, and its volume is greatly reduced compared with the three-electrode system under the same illumination area.

Description

technical field [0001] The invention relates to a new type of membrane electrode assembly for hydrogen production by photoelectrolysis of water. Specifically, the cathode and anode and the intermediate membrane layer are assembled into an MEA by hot pressing and mechanical pressure. A structural device that decomposes into hydrogen and oxygen and separates them online. Background technique [0002] The non-renewability of coal, oil, natural gas and other fossil resources and the environmental pollution caused by their extensive use make the development of renewable energy inevitable. Among the many renewable energy sources, solar energy is the only one that can replace fossil fuels and meet the large-scale application of human beings. However, due to regional differences and day and night characteristics, solar energy must be converted into other energy sources in order to solve the problem of storage and transportation. If the solar energy with low energy density is direc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/30C25B1/04
CPCY02E60/366Y02E60/36
Inventor 俞红梅李永坤张长昆付丽邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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