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

A separation device and a technology for producing hydrogen from water, which is applied in the electrolysis process, electrolysis components, light water/sewage treatment, etc., can solve the problems of less optimal design of the photoelectrolytic cell structure and no semiconductor materials, and achieve the elimination of post-processing steps, Effective use of the illuminated area and the effect of avoiding corrosion

Active Publication Date: 2013-06-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

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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 onli

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example 1:

Example Embodiment

[0050] The specific implementation is as follows:

[0051] 1) Prepare a titanium dioxide nanotube photoanode in which titanium dioxide and the substrate are integrated with pure titanium mesh.

[0052] Use pure titanium mesh as anode, graphite electrode or Pt sheet electrode as cathode, place it in the reactor and keep a certain distance (4cm) between the two electrodes. The electrolyte solution contains NH 4 F (0.5wt%) ethylene glycol (89.5wt%) water (10wt%) solution, copper wire used as a wire to connect the two electrodes to the two poles of the DC stabilized power supply, start the reaction, adjust the voltage to 30V. After 4 hours of reaction, the reaction was terminated. The prepared titanium mesh is placed in a muffle furnace for baking, at 450°C for 120 minutes, and after natural cooling, a titanium dioxide nanotube photoanode can be obtained.

[0053] 2) Pressing of membrane electrode assembly.

[0054] Take commercial Pt / C carbon paper electrode and A201 alkaline membrane (...

Example Embodiment

[0064] Example 2:

[0065] The specific implementation is as follows:

[0066] 1) Prepare a titanium dioxide nanotube photoanode in which titanium dioxide and the substrate are integrated with pure titanium mesh.

[0067] Use pure titanium mesh as anode, graphite electrode or Pt sheet electrode as cathode, place it in the reactor and keep a certain distance (4cm) between the two electrodes. The electrolyte solution contains NH 4 The ethylene glycol aqueous solution of F, the copper wire is used as a wire to connect the two electrodes to the DC stabilized power supply, and the reaction starts, and the voltage is adjusted to 30V. After reacting for 1 hour, the reaction was terminated. Place the prepared titanium mesh in a muffle furnace for baking, at 650°C for 120 minutes, and after natural cooling, a titanium dioxide nanotube photoanode can be obtained. The baked TiO 2 The surface morphology of the nanoarray is like Picture 9 Shown.

[0068] 2) Pressing of membrane electrode assembl...

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Abstract

The invention relates to a novel optical electrolytic cell structure, and particularly relates to an improvement on the basis of a three-electrode system, with a membrane electrode assembly being applied therein and an intermediate membrane layer being a solid polymer alkaline membranes. The device can directly perform on-line separation on hydrogen and oxygen produced by photoelectrocatalysis of water, prevents after-treatment processes of a conventional separation device for the hydrogen and oxygen, increases security of a system and greatly saves energy consumption. Besides, the structure has good stability. The novel optical electrolytic cell structure is compact in structure and compared with the three-electrode system, size is greatly reduced 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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IPC IPC(8): C02F1/461C02F1/30C25B1/04
CPCY02E60/36
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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