The reporter learned from the University of Science and Technology of China that Professor Sun Yongfu and Professor Xie Yi of Hefei National Research Center for Microscale Material Science designed a super-thin nanosheet catalyst with bimetallic active sites and realized its carbon dioxide High selectivity for photoreduction products. The results were published in the internationally renowned magazine "Nature · Energy". The greenhouse effect caused by excessive emissions of carbon dioxide is currently a major issue affecting human sustainable development. Inspired by plant photosynthesis, researchers designed to use artificial photosynthesis to convert carbon dioxide into hydrocarbon fuel under natural environmental conditions, which not only helps reduce the concentration of carbon dioxide in the air, but also can obtain high value-added carbon Base fuel. However, the diversity of carbon dioxide reduction products and the similar reduction potential of reduction products make the selectivity of reduction products unable to be effectively controlled. Therefore, the highly selective reduction of carbon dioxide to methane is still a huge challenge. The research team designed and constructed a bimetallic site-type ultra-thin nanosheet to achieve precise control over the selectivity of carbon dioxide reduction products. Taking the prepared CuIn5S8 ultra-thin nanosheet as an example, the theoretical simulation and in-situ infrared spectroscopy test results confirmed that the low-coordinate copper and indium sites can interact with carbon dioxide molecules to generate highly stable copper-carbon-oxygen-indium intermediates When the intermediate breaks to form a free-form carbon monoxide molecule at the same time, it needs to overcome a very high reaction energy barrier; in comparison, the reaction of hydrogenating the carbon atom of the intermediate to form a hydroxy intermediate is The exothermic reaction can proceed spontaneously, making it more inclined to obtain methane selectivity close to 100%. The photocatalytic test results confirmed that the CuIn5S8 ultra-thin nanosheets containing sulfur defects under the driving of visible light can reduce the selectivity of carbon dioxide to methane to nearly 100%, and achieve a higher yield. (Reporter Wu Changfeng) Cyclorama Light,Cyclorama Wash Effect Light,Led Cyclorama Wash Effect Light,Cyclorama Led Lighting EV LIGHT Guangzhou Co., Ltd , https://www.evlightpro.com
New photocatalyst turns carbon dioxide into energy with high selectivity