讲座题目：Towards understanding catalysis at water-solid interfaces
主讲人：Johannes A. Lercher 院士
主持人：刘玥 研究员
开始时间：2024-04-29 10:00
讲座地址：普陀校区化学馆A205室
主办单位：化学与分子工程学院
报告人简介：
Johannes A. Lercher教授，奥地利科学院院士 /美国工程院院士/欧洲科学院院士。曾担任欧洲催化协会主席，德国催化协会副主席，国际分子筛协会主席。长期担任国际催化领域的重要期刊《Journal of Catalysis》和《Catalysis Communications》的主编和包括中国催化学报《Chinese Journal of Catalysis》在内的多种国际期刊编委顾问等。其研究致力于从基元反应步骤着手揭示固体表面的催化反应规律，通过设计和合成具有特定纳米结构和功能的催化材料，实现对反应中各步骤的精确调控，达到提高反应活性和产物选择性的目标。他的工作结合先进的红外、拉曼、固态核磁光谱和X射线吸收光谱等方法来表征催化剂在制备阶段和反应过程中的骨架结构和电子状态。他引领了催化反应原位分子光谱学，用于表征真实状况下的催化反应，并用这些信息开发了多种新型复杂催化剂，成功应用于生物质转化、芳烃烷基化、甲醇制烯烃、二氧化碳重整和加氢转化以及甲烷选择性氧化等重要反应。到目前为止，他获得授权美国专利30余件、在国际学术刊物上发表论文600余篇，被引用近4万次，H-index为98。
报告内容：
Water, along with other polar molecules, self-organizes on oxide surfaces and within microporous materials. The establishing acid base equilibrium affects sorption and catalysis by modifying the chemical and thermodynamic properties of both the solid environment and the hosted molecules. These interactions do not consitute, local hydrophilic or hydrophobic behavior. It will be discussed, how high concentrations of charged species create an environment causing a pronounced destabilization of uncharged initial states and stabilizing charged transition states. This may increase rates of catalytic pathways. Water layers on metal particles on the other hand induce changes by influencing the electronic surface properties and influencing binding of hydrogen on these metal surfaces. In turn, the strength of this binding determines rates of hydrogen addition reactions for polar functional groups. Changing the binding of hydrogen by external electric potentials opens additional new pathways to influence metal catalyzed reactions by non-Faradaic effects. For both acid-base and metal catalyzed reactions, the lecture will show the links between these underlying physicochemical causes for the observed changes induced by water in sorption and catalysis and will discuss opportunities and limitations for developing new catalytic pathways for a circular carbon-neutral catalysis.
