Li can, academician of Dalian Institute of chemistry, Chinese Academy of Sciences, has made new progress in the study of photolysis of water to produce hydrogen by simulating natural photosynthesis system

Recently, Ye Sheng, a doctoral student led by Li can, academician of the Ministry of solar energy and State Key Laboratory of catalysis foundation of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, made new progress in the research of simulating natural photosynthesis to build an efficient artificial photosynthetic system Based on the concept of bionics, the researchers combined partially oxidized graphene with hole storage layer to greatly improve the efficiency of photogenerated charge separation, thus realizing efficient photocatalytic decomposition of water for hydrogen production The relevant research results were published in the full text of the Journal of the American Chemical Society (j.am.chem.soc., 2018, Doi: 10.1021/jacs.7b10662), and was invited as the current cover article of JACS JACS cover source: J am Chem SOC By simulating the important functions of key components in optical system II, the research team adopted BiVO 4 semiconductor as light trapping material, and nifeldh as hole storage layer (angel Chem Int ed., 2014, 53, 7295; energy energy energy SCI., 2016, 9, 1327), which can inhibit the photocorrosion of BiVO 4 The molecular co cubane was used as a water oxidation catalyst to simulate the oxygen releasing center of Mn 4cao 5 in natural photosynthesis The researchers found that the partially oxidized graphene (PGO) can be used as a charge transfer medium between the light trapping material and the water oxidation catalyst, showing a similar function to tyrosine (Tyr) in natural light system II The results show that the biomimetic system has high efficiency and stability in the photocatalytic decomposition of water, and the initial potential of water oxidation is 0.17 V, close to the theoretical value of thermodynamics, which is the lowest value reported in the literature In addition, the photocurrent of the system is as high as 4.45 Ma · cm - 2 at 1.23 V (vs.rhe) bias voltage, and the conversion of solar energy to hydrogen energy (sth) is more than 2.0% This work is a new progress in the application of photocatalysis in water decomposition by photocatalysis after the research of semiconductor and molecular catalyst coupling system used in photocatalysis (J catalyst., 2016, 338, 168; J am Chem SOC., 2016, 138, 10726) Sources of hydrogen production from photodegradation water of natural and biomimetic systems: J am Chem SOC The above work has been supported by the 973 project of the Ministry of science and technology, the National Natural Science Foundation, the strategic leading science and technology program of the Chinese Academy of Sciences and the ichem of the Ministry of education Paper link: https://pubs.acs.org/doi/abs/10.1021/jacs.7b10662 introduction of Academician Li can: http://sourcedb.dicp.cas.cn/zw/zjrck/200908/t20090820_.html Academician Li can