报告人：Johannes V. Barth教授 慕尼黑工业大学
报告题目：Adatom-mediated chemical conversions and dynamic heterogeneity at surfaces: from catalysis to 2D-materials
报告时间：2025年11月17日上午10:00
报告地点：304号楼4303报告厅
报告摘要：
The concept of active sites, as conceived by HS Taylor a century ago, is of central relevance for heterogenous catalysis. Herein we examine the role of adatoms in surface chemistry, including recently established on-surface synthesis. It is suggested that thermally generated intrinsic adatoms account for a dynamic surface heterogeneity and can be recognized as member of the single-atom site catalyst family. Notably, as frequently mobile species under reaction conditions, they seem to interfere in a multitude of surface chemical processes, catalytically mediate intricate reaction pathways and transient product formations. Showcase examples encompass interfacial terminal alkyne chemistry, on-surface Ullmann-type reactions, Hopf cyclizations of enediynes, carboxyl–amine coupling, etc.. In addition they also can be incorporated in both metal-organic and organometallic compounds or nanoarchitectures, typically synthesized at suitable metal substrates. Furthermore, extrinsic adatoms have been employed as external stimuli in on-surface synthesis (triggering regioselective cleaving of C−H bonds, dehalogenation, homo-coupling etc.) and transmetalation protocols at both metal and non-metal surfaces.
个人简介 ：
After studying physics at Munich’s Ludwig Maximilians University J. Barth received his doctorate in physical chemistry with G. Ertl at the Fritz Haber Institute of the Max Planck Society (1992). He was an IBM Postdoctoral Fellow at the IBM Almaden Research Center in San Jose, and spent over a decade at the École Polytechnique Fédérale de Lausanne, where he received the venia legendi. Following a nomination as Canada Research Chair at the University of British Columbia in Vancouver, he accepted a chair at TUM in 2007 and has been serving as Faculty Dean since many years.
Research activities focus on physicochemical phenomena at interfaces and molecular nanoscience.
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