Recently, Li Chan (Academician of the Chinese Academy of Sciences), Zong Xu (Young Talents Program), Wang Wangyin, and others of the State Key Laboratory of Catalysis and the National Laboratory of Clean Energy of the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences in Artificial-Natural Coupling Photosynthesis Advances have been made in the design and construction of water-splitting systems. The results were published in the form of “Hot Paper†in Angew. Chem. Int. Ed. 2016 (DOI: 10.1002/anie.201604091).
Solar photocatalytic decomposition of water to hydrogen is one of the most challenging topics in the scientific community. The construction of natural photosynthetic and artificial photosynthetic coupling system can integrate the advantages of the two systems, and it is expected to achieve high-efficiency water decomposition reaction. The related research has important scientific significance. In the previous study, Li Can's group proposed the concept of natural artificial hybrid artificial photosynthetic system, and constructed a self-assembled hybrid photosynthesis system of plant photosynthetic system II (PSII) enzyme and semiconductor powder photocatalyst, which was first realized in the world. The class hybrid system photocatalytic stoichiometry than full decomposition water reaction (Nat. Commun. 2014, 5, 4647).
In the study, the team developed a new photocatalytic-photocatalytic Z-scheme design, and based on this design, a novel natural-artificial photosynthetic hybrid system was constructed by coupling the photosynthetic enzyme PSII and a silicon-based photochemical cell. The system can not only achieve the complete water reaction under solar energy (ie: 2H2O=O2+2H2), but also the natural separation of H2 and O2, which avoids the difficulty of separation of H2/O2 in the traditional Z-scheme design; The artificial system's complementary absorption of long-wavelength solar energy by short-band and natural systems greatly improves solar energy utilization efficiency and system stability. The study provides new ideas for the further development of high-efficiency natural-artificial hybrid solar photosynthesis systems. At the same time, this work is also followed by research into the conversion of solar H2S resources (Angew. Chem. Int. Ed. 2014, 53: 4399-4403.; Energy Environ. Sci. 2014, 7: 3347-3351) in coupled solar energy conversion systems. New progress in design and construction shows the advantages and potential of building a coupled system in solar energy conversion and utilization.
The research was funded by the "973" project of the Ministry of Science and Technology, the National Natural Science Foundation of China, the Collaborative Innovation Center for Energy and Materials Chemistry of the Ministry of Education (2011 · iChEM) and the Youth Thousand Talents Program.
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