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.
References
[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).

Join Zoom-Meeting
https://zoom.us/j/99518446360?pwd=VkFFQWpjUS8waDExMHNlOEthWFNtZz09
Meeting-ID: 995 1844 6360
Passcode: 028257