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Photosynthesis and (photo-catalysis) electro-catalysis combination system separated type hydrogen production method through water splitting

A technology of photosynthesis and photoelectric catalysis, applied in the direction of electrolysis process, electrolysis components, electrodes, etc., can solve the problems of decreased activity of microalgae, low reaction efficiency, difficult separation, etc., and achieve the effect of low cost

Active Publication Date: 2018-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0008] (2) The microalgae are immobilized on the electrode substrate, and the system is relatively complicated, which leads to a decrease in the activity of the microalgae compared with the free one, and the reaction efficiency is low
[0010] (4) The photocatalytic system produces mixed hydrogen and oxygen, which is not easy to separate, and it is difficult to collect high-purity oxygen and hydrogen

Method used

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  • Photosynthesis and (photo-catalysis) electro-catalysis combination system separated type hydrogen production method through water splitting
  • Photosynthesis and (photo-catalysis) electro-catalysis combination system separated type hydrogen production method through water splitting
  • Photosynthesis and (photo-catalysis) electro-catalysis combination system separated type hydrogen production method through water splitting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This example evaluates the activity of reducing potassium ferricyanide by photosynthetic oxygenated water of Chrysopsis zhanjiangensis.

[0044] Take 20 milliliters of Zhanjiang Isoflagellate bath with a bath density of 50 million cells / ml and stir in the reactor, add a potassium ferricyanide seawater solution with a concentration of 5 mM, and at room temperature, use a light intensity of 300E / m 2 the s -1 The fluorescent lamp is the light source, and the photosynthesis reduces potassium ferricyanide to produce potassium ferrocyanide. The content of the ion pair concentration after a certain period of light is analyzed by ultraviolet-visible absorption spectrum, and the reaction results are as follows: image 3 .

Embodiment 2

[0046] This example evaluates the effect of incident light intensity on the activity of reducing potassium ferricyanide by photosynthetic oxygenated water of Isoflagellates Zhanjiang.

[0047] Take 20 ml of Zhanjiang Isoflagellate bath with a bath density of 50 million cells / ml and stir in the reactor, add potassium ferricyanide seawater solution with a concentration of 5 mM, at room temperature, control the fluorescent light source to illuminate the reaction with different light intensities system, photosynthesis reduces potassium ferricyanide to produce potassium ferrocyanide, and analyzes the concentration of electricity pairs after a certain period of time by ultraviolet-visible absorption spectroscopy. The reaction results are as follows Figure 4 .

Embodiment 3

[0049] This example evaluates the effect of algae density on the activity of reducing potassium ferricyanide by photosynthetic oxygenated water of Isoflagellates Zhanjiang.

[0050] Cultivate Zhanjiang Isoflagellates to a certain algae density under the same conditions as other conditions. Take 20 ml and stir it in the reactor, add potassium ferricyanide seawater solution with a concentration of 5 mM, at room temperature, light intensity at 300 μE / m 2 the s -1 The fluorescent lamp is the light source to illuminate the reaction system, and the photosynthesis reduces potassium ferricyanide to produce potassium ferrocyanide. The content of the ion pair concentration after a certain period of light is analyzed by ultraviolet-visible absorption spectrum, and the reaction results are as follows: Figure 5 .

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Abstract

The invention provides a photosynthesis and (photo-catalysis) electro-catalysis combination system separated type hydrogen production method through water splitting. According to the method, water isoxidized to release oxygen through microalgae photo-system II enzymes based on solar photosynthesis, an additional chemical electron carrier is reduced, and the carrier storing electrons and an electrolyte solution of protons are stored and transported to a (photo-catalysis) electro-catalysis system for generating hydrogen. In a (photo-catalysis) electro-catalysis pool, the electron carrier is subjected to oxidizing reaction on an anode to release electrons, a cathode is combined with the protons to generate hydrogen, and after the hydrogen is collected, the electrolyte solution is returned tothe photosynthesis system to be recycled. Through the method, the biological water oxidation reaction and the electrochemistry proton reduction reaction are designed into relatively independent systems, hydrogen and oxygen are produced through separation in the space, the hydrogen and oxygen separation problem is solved, and solar energy and electric energy are comprehensively utilized by combining biological photosynthesis with the manual photo-electro-chemistry process.

Description

technical field [0001] The invention belongs to the technical field of photochemical conversion of solar energy to produce solar fuel, and in particular relates to a method for producing hydrogen by splitting water in a photosynthesis-(photo)electrocatalysis combined system. Background technique [0002] With the increasing development of human society, the energy crisis and environmental problems brought about by the consumption of traditional fossil fuels seriously threaten the sustainable development of human beings, and the development of clean and renewable energy is imminent. Among many clean energy forms, solar energy has the advantages of being inexhaustible, clean and pollution-free, and widely distributed. Converting it into a clean fuel that can be stored and transported will be one of the ways to utilize solar energy. As another form of clean energy, hydrogen energy has the advantages of high combustion calorific value and zero emissions. Therefore, the producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B11/04C25B1/55Y02E60/36Y02P20/133
Inventor 李灿王旺银丁春梅姚婷婷薛松吴佩春
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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