Physikalische Chemie - Direktor: Prof. Dr. Martin Wolf
Department Online Seminar
Chair: Akitoshi Shiotari

Monday, June 27, 2022, 10:00 am
Emiko Kazuma
Department of Applied Chemistry, The University of Tokyo
Single-Molecule Studies of Dissociation Reactions of O2 Molecules on Ag(110) by Electrons, Holes, and Localized Surface Plasmons
A mechanistic understanding of the dissociation of O2 molecules adsorbed on metal surfaces is crucial not only for the precise control of oxidation reactions but also for the development of various heterogeneous oxidation catalysts. To obtain the mechanistic insight into the dissociation reaction, the investigation of the dissociation reaction at a single-molecule level is increasingly important. In addition, a detailed understanding of the interfacial interactions between O2 molecules and metal surfaces is crucial to improving reaction efficiency. In this seminar, I will introduce our single-molecule studies of O2 dissociation on Ag(110) induced by various excitation sources, including electrons, holes, and localized surface plasmons, using a scanning tunneling microscope (STM).1-3 The comprehensive studies based on STM experiments and density functional theory calculations provide fundamental insights into the excitation pathway for the dissociation reaction.
[1] E. Kazuma, M. Lee, J. Jung, M. Trenary, Y. Kim, “Single-molecule study of a plasmon-induced reaction for a strongly chemisorbed molecule” Angew. Chem. Int. Ed. 59, 7960−7966 (2020).
[2] M. Lee, E. Kazuma, C. Zhang, M. Trenary, J. Takeya, J. Jung, Y. Kim, “Dissociation mechanism of a single O2 molecule chemisorbed on Ag(110)” J. Phys. Chem. Lett. 12, 9868–9873 (2021).
[3] M. Lee, E. Kazuma, J. Jung, M. Trenary, Y. Kim, “Dissociation of single O2 molecules on Ag(110) by electrons, holes, and localized surface plasmons,” Chem. Rec. e202200011 (1–12) (2022).

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