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O: Fachverband Oberflächenphysik

O 45: Solid-Liquid Interfaces II: Reactions and Electrochemistry

O 45.3: Hauptvortrag

Dienstag, 17. März 2020, 11:00–11:30, WIL C107

In-situ identification of catalytically active surface sites using electrochemical STM — •Aliaksandr Bandarenka — Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany

In the presentation, it will be demonstrated that common electrochemical STMs can be used to map the catalytic activity of the electrode surfaces with high spatial resolution. By monitoring relative changes in the tunnelling current noise, active sites can be distinguished in an almost quantitative fashion. Several important for energy provision reactions are used as model systems: the hydrogen evolution, oxygen reduction and oxygen evolution reactions. The above mentioned approach allowed to evaluate directly the nature of active sites at Pt(111), Pt3Ni(111), Pt and Pd monolayers on Au(111), HOPG, MoS2, MoSe2 and IrO2 electrodes in acidic and alkaline media.

References

- E. Mitterreiter, Y. Liang, M. Golibrzuch, D. McLaughlin, C. Csoklich, J.D. Bartl, A. Holleitner, U. Wurstbauer, A.S. Bandarenka. NPJ 2D Materials and Applications 3 (2019) 25 - Y. Liang, C. Csoklich, D. McLaughlin, O. Schneider, A.S. Bandarenka. ACS Applied Materials and Interfaces 11 (2019) 12476*12480 - Y. Liang, D. Mclaughlin, C. Csoklich, O. Schneider, A.S. Bandarenka. Energy & Environmental Science 12 (2019) 351-357 - J.H.K. Pfisterer, Y. Liang, O. Schneider, A.S. Bandarenka. Nature 549 (2017) 74*77