报告题目：Photoelectrochemical CO₂ Reduction into Acetaldehyde and Formaldehyde

开始时间：2018-11-05 15:30-16:30

报告地点：材料学院（实验一楼）第一会议室

报告人：韩国西江大学Young Soo Kang教授

联系人：杨化桂教授

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About the speaker

         Young Soo Kang, professor of theSogang university. President of Korea Photoscience Society and deputy director of the Korea Center for Artificial Photosynthesis (KCAP).He received his bachelor's and master's degrees at Pusan National University, followed by a PhD at University of Houston. Heengages in photocatalytic water splitting to produce hydrogen and carbon dioxide reduction, nano-composite materials, nano-magnetic materials and single electron transistors based on quantum dots research. He has published more than 170 papers in ACS, Wiley Science and Elsevier and enjoys a high reputation in the field of photoelectric catalysis. Young Soo Kang is also a member of the Korean Chemical Society, the American Chemical Society and theJapanese Chemical Society.

Abstract of the talk

        In this report, photoelectrochemical (PEC) system for the reduction ofCO₂into formaldehyde and acetaldehyde with minor hydrogen gas bubbling has been described in the aspect of thermodynamics and kinetics of the CO₂ reduction reaction to have efficient method by lowering activation energy of CO₂ reduction on the electron transfer reaction and to do reduction potential tuning of CO₂ reduction reaction for the selective reduction products. When Ca/Fe doped TiO₂ photoanode oxidizes water, rGO/PVP/Nafion multi-layers coated and fabricated on the surface of Cu foil cathode reduce CO₂ into acetaldehyde and formaldehyde. When solar light was irradiated, electrons get excited to the conduction band of Ca/Fe doped TiO₂ and transported to the cathode via external wire. rGO has been used for the dual functions of reduction potential tuning and multi-electron shuttling process of CO₂ reduction reaction. N-heterocyclic PVP helps to capture and do chemical activation of reactant CO₂ molecule. These functions result in the lowered activation energy for the CO₂ reduction reaction. Nafion film assists the faster transport of H⁺ ions to CO₂ reduction reaction sites for the simultaneous one-pot reaction of proton coupled electron transfer reactions.