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Device for decomposing water to produce hydrogen based on optical electrolytic bath

A technology of photoelectrolysis and hydrogen production from water, which is applied in electrolysis process, electrolysis components, light water/sewage treatment, etc. It can solve the problem of high power consumption, reduce ohmic impedance loss, save post-processing steps, and avoid corrosion.

Active Publication Date: 2012-02-01
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

[0012] However, in alkaline water electrolysis, the conversion from electric energy to secondary energy hydrogen energy requires high power consumption.

Method used

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  • Device for decomposing water to produce hydrogen based on optical electrolytic bath
  • Device for decomposing water to produce hydrogen based on optical electrolytic bath
  • Device for decomposing water to produce hydrogen based on optical electrolytic bath

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0048] Its specific implementation is as follows:

[0049] 1) use figure 1 The photoelectrolytic cell was assembled in the middle structure and placed on the test platform, with 1M KOH solution passing through both sides, and allowed to stabilize at room temperature for 30 minutes.

[0050] 2) After 30 minutes, the polarization curve test will be carried out between 0-2V. After the test is completed, turn on the light source and stabilize it for 5 minutes, and test the polarization curve under the condition of external light.

[0051] figure 2 is the relationship curve between the current and the applied voltage of the assembled photoelectrolytic cell at room temperature. Depend on figure 2 It can be seen from the results that a weak current can appear in the photoelectrolytic cell at a voltage of 1v under the condition of external light. With the gradual increase of the applied voltage, the current increases, and the influence of light becomes more prominent with the in...

Embodiment 2

[0054] image 3 It is the current-time relationship curve of the photoelectrolytic cell at room temperature and an applied voltage of 1.23V.

[0055] From image 3 It can be seen from the results that under a constant applied voltage, the current value can reach 12mA when there is an applied light, and it remains stable. When the light is suddenly stopped, the current value drops sharply, and after stabilization, it is about 1mA, and gradually tends to be stable. When the light is restored again, the current value rises rapidly and gradually increases to a stable value. The system runs continuously for 2 hours, and the current value has no attenuation, which proves that the performance of the self-designed photoelectrolyte cell is relatively stable.

[0056] Figure 4 It is the chromatographic analysis image of the gas produced by the cathode of the photoelectrolytic cell under steady operation.

[0057] Depend on Figure 4 From the correlation results, it can be seen tha...

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Abstract

The invention relates to a novel optical electrolytic bath structure and particularly relates to a device for decomposing water into hydrogen and oxygen in an alkaline solution by virtue of the excitation action of light at a theoretical decomposition voltage lower than that of the water. The device is improved on the basis of a conventional alkaline water electrolytic bath, a membrane electrode structure is applied to the inside, zero distance between an electrode and a membrane electrode is ensured effectively, electrolytic efficiency is improved and energy consumption is lowered, and furthermore, the device has favorable stability.

Description

technical field [0001] The invention relates to a device for generating hydrogen by light-assisted electrolysis of water, specifically a structural device for decomposing water into hydrogen and oxygen and separating them online by applying voltage in an alkaline solution system and supplemented by light. Background technique [0002] In recent years, with the continuous development of the world economy and the accelerated consumption of non-renewable fossil fuels such as coal, oil, and natural gas, the traditional energy system is changing step by step, and the development and research of new energy sources is imminent. Among the many sustainable 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. [0003] In a...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/30C25B1/04
CPCY02E60/366Y02E60/36
Inventor 俞红梅李永坤衣宝廉洪有陆邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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