中国科学院发表最新Science论文

Core Viewpoint - The article discusses a groundbreaking research study from the Dalian Institute of Chemical Physics, which presents a two-step method for producing ethylene from carbon dioxide (CO2) using photochemical hydrogen dissociation, achieving nearly quantitative reduction of CO2 to ethylene [2][3]. Group 1 - The research team discovered that under 365 nm wavelength irradiation, an Au-TiO2 composite structure can achieve hydrogen dissociation at room temperature [3]. - The mechanism involves the formation of interfacial electric dipoles from photo-generated electron-hole pairs between gold nanoparticles and the titanium-oxide framework, enhancing hydrogen dissociation capabilities [3]. - The process results in a conversion rate of over 99% from CO2 to ethane, and after 1500 hours of continuous irradiation, the system maintains over 99% selectivity for ethylene [3]. Group 2 - This study provides a new strategy for precise control of C-C coupling and directed conversion of CO2, which is a significant advancement in the field of chemical engineering and sustainability [3].