Recently, an artificial photosynthetic research project led by Academician Li Can of the Chinese Academy of Sciences and a researcher of the "Hundred Talents Program" Chen Hao has made important progress: the realization of solar energy to decompose water into hydrogen and oxygen. The research results will be published in the "Nature-Communications" and become the world's first successful research report.
The photosynthesis of leaves is the “master†of using solar energy. The oxygen, food, and energy that humans rely on for survival and development come from nature's photosynthesis. People expect to get inspired from the mechanism of photosynthesis and build an efficient artificial photosynthetic system to produce clean solar fuel—hydrogen.
During the research process, Academician Li Can proposed the concept of a composite artificial photosynthetic system, trying to integrate the advantages of natural and artificial photosynthetic systems, and establishing a composite system of natural photosynthetic and artificial photosynthetic in order to achieve efficient conversion of solar energy to chemical energy, and revealing natural The mysteries of the photosynthetic system. Based on this concept, a hybrid system has been constructed to achieve efficient hydrogen production, hydrogen transfer, and CO2 hydrogenation and other reduction reactions.
The researchers said that the current research progress is to combine the advantages of photosynthetic enzymes PSII and artificial photocatalysts to construct a self-assembled photosynthetic system of plant PSII enzymes and semiconductor photocatalysts. Under visible light irradiation, hydrogen and oxygen are produced in a stoichiometric ratio to decompose water (ie: 2H2OO2+2H2). And the flask containing the catalyst was placed outdoors in the sun and the decomposition water released hydrogen gas.
The study also found that PSII membrane fragments can be bound to the surface of inorganic catalysts by self-assembly. Electrons generated by PSII oxidation water transfer ions through the interface to transfer electrons to the surface of the semiconductor catalyst and participate in proton reduction and hydrogen production.
This study provides the original idea for the further construction and development of natural-artificial hybrid solar energy efficient photosynthetic systems. (Intern Wu Yan)
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