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High-efficiency self-coupling solar hydrogen-system making

A hydrogen production system, self-coupling technology, applied in the field of solar hydrogen production system, can solve the problems of efficiency loss, reduce solar energy-hydrogen conversion efficiency, etc., and achieve the effect of improving conversion efficiency

Inactive Publication Date: 2008-11-19
DAQING GASOLINEEUM INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The power generation system of traditional solar photovoltaic water electrolysis hydrogen production is generally a square array of solar cells, which must be controlled by a maximum power point tracker (MPPT) to adjust the voltage and power to match the electrolytic cell, but at the same time it causes a loss of efficiency and reduces the solar energy. - The conversion efficiency of hydrogen, usually the conversion efficiency of solar energy to hydrogen is only about 10%

Method used

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  • High-efficiency self-coupling solar hydrogen-system making

Examples

Experimental program
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Embodiment 1

[0020] like figure 1 As shown, the subsystem of the solar hydrogen production system includes a photovoltaic unit (1) and an electrolysis unit (2), and the two are directly connected together to obtain a self-coupling integration to construct a photolysis water hydrogen production subsystem.

[0021] (1) Technical parameters of photoelectric unit

[0022] Composition: Al 0.15 Ga 0.85 As / Si, unit electrode area is 0.22cm 2 .

[0023] Obtain the working curve (I-V) of the photoelectric unit through the I-V curve test system as attached image 3 shown.

[0024] (2) Technical parameters and preparation methods of the electrolysis unit

[0025] Composition: Cathode: Pt black ; Anode: RuO 2 ; Electrolyte: 1M HClO 4 , the unit electrode area is 10cm 2 .

[0026] ① Cathode Pt black Preparation:

[0027] 3g H 2 PtCl 6 and 0.25g Pb(C 2 h 3 o 2 ) 2 Dissolved in 100mL of water to prepare the electroplating solution. The Pt mesh (4cm×4cm) was cleaned with dilute nitric ...

Embodiment 2

[0063] 1. The photoelectric unit is the same as in Embodiment 1.

[0064] 2. The electrolyte in the electrolysis unit is 1M KOH (excellent pure), and the cathode is Pt black , the anode is Ru 0.5 Ce 0.3 sn 0.2 o 2 .

[0065] (1) Cathode Pt black The preparation method is the same as in Example 1.

[0066] (2) Anode Ru 0.5 Ce 0.3 sn 0.2 o 2

[0067] The first step of titanium sheet pretreatment: polish the Ti sheet with a thickness of 200 μm with sandpaper, corrode it with 20% hydrochloric acid for 2 minutes, and wash it with water.

[0068] Take 0.05mol RuCl in the second step 3 -3H 2 O, 0.03molCe(SO 4 ) 2 -4H 2 O, 0.02mol SnCl 2 -2H 2 O, use 20% hydrochloric acid to prepare it into a solution with a total concentration of Ru-Ce-Sn metal ions of 0.1M.

[0069] The third step is to immerse the treated titanium sheet in the prepared solution, evaporate the solvent, bake at 350°C for 15min, repeat the above steps five times, and then bake at 400°C for 1h, so th...

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Abstract

The invention provides a high-efficiency self-coupling solar hydrogen production system, which comprises a plurality of subsystems and each subsystem consists of a photoelectric unit and an electrolytic unit, wherein, the material of the photoelectric unit is Al1-xGaxAs / Si, and the electrolytic unit consists of Pt-based cathode materials, ruthenium oxide-based anode materials and 1M HClO4 or 1M KOH electrolyte; the photoelectric unit is directly connected with the electrolytic unit; and the photoelectric unit supplies the electrolytic voltage between 1.30 and 1.40 volt to the electrolytic unit after connection. The system can greatly improve the transformation efficiency of solar energy-hydrogen.

Description

Technical field: [0001] The invention relates to a solar hydrogen production system, in particular to a solar hydrogen production system with high photohydrogen conversion efficiency. Background technique: [0002] Hydrogen mainly exists in the form of compound water on the earth, and its combustion value is high. The main product of combustion in the air is water, which is non-polluting. Water is used to produce hydrogen, and so on. Based on this, hydrogen energy meets the requirements of resources, environment, and sustainable development at the same time, and becomes the most promising clean energy to replace existing fossil energy. The use of renewable energy to produce hydrogen is an effective way to develop hydrogen energy. At present, using water as raw material to produce hydrogen on a large scale using nuclear energy and solar energy has become the goal of joint efforts of all countries in the world, among which solar hydrogen production is the most attractive and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B9/00
CPCY02E70/10Y02E60/366Y02E60/36Y02P20/133
Inventor 王宝辉刘淑芝吴红军
Owner DAQING GASOLINEEUM INST
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