2017.10.19东京理科大学Akihiko Kudo教授

来源：null   发布时间： 2017-10-19  

Water splitting and CO2 reduction using photocatalyst materials

报 告 人：Akihiko Kudo，东京理科大学
报告时间：2017年10月19日（星期四）16:00-17:00
报告地点：308会议室
主 持 人：王丹研究员

报告人简介：
Dr. Akihiko Kudo received his early education at Tokyo University of Science obtaining a B.S. degree in 1983 and his Ph.D. degree in 1988 from Tokyo Institute of Technology. After one and half year as a post-doctoral fellow at the University of Texas in Austin, he became a Research Associate at the Tokyo Institute of Technology until 1995. He then joined the Tokyo University of Science as a Lecturer before he became Associate Professor in 1998 and Full Professor in 2003. He received the Inoue Research Award for Young Scientists in 1990, the award of Encouragement of Research and Development from Catalysis Society of Japan in 2001, the award of Japanese Photochemical Association in 2009, the 10th Green and Sustainable Chemistry Award awarded by the Ministry of Environment in 2011, and Catalysis Society of Japan Award (Academic field) in 2017.His current research interest focuses on photocatalyst materials for water splitting and CO2 fixation of artificial photosynthesis.

报告内容简介：
Water splitting and CO2 fixation of uphill reactions can be regarded as artificial photosynthesis, because light energy is converted to chemical energy. In the present paper, we introduce various metal oxide and sulfide photocatalysts and photoelectrochemical cells aiming at artificial photosynthesis. I will present the basis of photocatalytic reactions and our results.
Rh and Sb-codoped SrTiO3 photocatalyst loaded with an IrO2 cocatalyst is active for water splitting into H2 and O2 under visible light and simulated sunlight irradiations as a single particle type of photocatalyst. This photocatalyst responds to 500 nm. SrTiO3:Rh of a H2-evolving photocatalyst and BiVO4 of an O2-evolving photocatalyst construct various types of Z-schematic photocatalyst systems with Fe3+/Fe2+, [Co(bpy)3]3+/2+, [Co(phen)3]3+/2+, and a conductive reduced graphene oxide (RGO) of electron mediators and even without an electron mediator. Z-schematic photocatalyst systems composed of metal sulfides of H2-evolving photocatalysts with TiO2 and BiVO4 of O2-evolving photocatalysts with RGO and Co complexes of electron mediators show activity for water splitting into H2 and O2. These photocatalyst materials can also be employed for photoelectrochemical system for solar water splitting. Ag/BaLa4Ti4O15 and Ag/KCaSrTa5O15 photocatalysts with wide bandgaps show activities for CO2 reduction to form CO and HCOOH in an aqueous medium without any sacrificial reagents. O2 evolved with a stoichiometric amount under UV irradiation indicating that water reacts as an electron donor. Thus, an uphill reaction of CO2 reduction accompanied with water oxidation was successfully achieved. CuGaS2-RGO/BiVO4 of a Z-scheme photocatalyst system is active for water splitting and CO2 reduction to CO under visible light irradiation without any sacrificial reagents. This is the first time to demonstrate CO2 reduction using water as an electron donor in a powdered photocatalyst system with visible light response.