Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):

Y. Suchorski, M. Datler, I. Bespalov, J. Zeininger, G. Rupprechter:
"Local surface reaction kinetics "just by imaging"";
Vortrag: ECOSS-31 31st European Conference on Surface Science, Barcelona; 31.08.2015 - 04.09.2015; in: "Book of Abstracts", (2015), S. 64.

Kurzfassung englisch:
Many of the catalytic surface reactions can be visualized in situ by PEEM. For the reactions which follow the Langmuir-Hinshelwood mechanism, obtained real time images reflect the correlation between the local catalytic activity of particular surface regions and the local photoemission yield [1]. Both quantities depend on the surface coverage of reacting adsorbates, which in turn governs the local work function and thus the yield of emitted photoelectrons, i.e. the intensity of the PEEM image. Such correlation is scalable down to the nm-scale and allows in principle to obtain the laterally-resolved kinetic information with the resolution of the corresponding device. Such "reaction kinetics by imaging" approach has been realised using the digital analysis of the video-PEEM sequences recorded during the ongoing CO oxidation and was applied first to the individual µm-sized Pt and Pd grains of polycrystalline foils and supported Pd powders [1-3]. In present contribution we apply this approach for the first time to study the local kinetics of H2 oxidation on individual Rh(hkl) domains of polycrystalline Rh foil and on the Rh powder supported by ZrO2.

[1] Y. Suchorski, C. Spiel, D. Vogel, W. Drachsel, R. Schlögl, G. Rupprechter, Chem. Phys. Chem. 11 (2010) 3231. [2] D. Vogel, Ch. Spiel, A. Suchorski, A. Trinchero, R. Schlögl, H. Grönbeck and G. Rupprechter, Angew. Chem. Int. Ed. 51 (2012) 10041 [3] D. Vogel, C. Spiel, M. Schmid, M. Stöger-Pollach, R. Schlögl, Y. Suchorski, G. Rupprechter, J. Phys. Chem. C, 117 (2013)

Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.