报告人简介：

  Dr. Xin Zhang received his Bachelor’s degree in 2007 from East China University of Science and technology (ECUST) and his M.Sc. in sensor system technology from Karlsruhe University of Applied Sciences (Germany) in 2010. In 2011, he joined the Institute for Sensors and Information systems at Karlsruhe University of Applied Sciences, and since then has worked as a research associate in the group of Prof. Dr. Heinz Kohler. Meanwhile, he was conferred with the academic title Dr. rer. nat from Dresden University of Technology, Germany. His research interests include chemical sensors, sensor technologyand intelligent gas sensor systems.

摘要：

  Mixed potential gas sensors with layered Au, Pt-YSZ electrode comprising a thick-film Pt-YSZ electrode and a covering thin-film Au layer deposited in two different thicknesses, respectively, were studied in this work. It was shown by GD-OES analysis that the Au layer is not uniformly admixed with the Pt-YSZ bulk after firing treatment at 850℃, but results in a gradient of Au from top over the thickness of the electrode. Surprisingly, also this kind of layered electrode exhibits a mixed-potential characteristic, which was confirmed by open circuit potential measurement. Better sensitivity to CO was found for the electrode with thicker Au layer, and was attributed to the reduced catalytic activity for the oxygen reduction reaction by addition of Au. This aspect was investigated by cyclic voltammetry, and the dependence of electrochemical behaviors of the electrodes on temperature was studied as well. Over all, the experiments have clearly shown, that mixed potential formation at the Au, Pt-YSZ MPE can be dominated by a relatively thin Au,Pt-layer in the top part of the porous electrode material.

主  持 人：卢革宇 教授

报告时间：2018年12月25日 14:00

报告地点：唐敖庆楼D316报告厅

主办单位：电子科学与工程学院

                 集成光电子学国家重点实验室

                 物质科学吉林省高校高端科技创新平台