Berlin 2005 – wissenschaftliches Programm

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O: Oberflächenphysik

O 15: Postersitzung (Adsorption an Oberfl
ächen, Epitaxie und Wachstum, Organische Dünnschichten, Oxide und Isolatoren, Rastersondentechniken, Zeitaufgelöste Spektroskopie, Methoden)

O 15.83: Poster

Freitag, 4. März 2005, 17:00–20:00, Poster TU D

UHV compatible high-pressure reaction cell for in-situ IR and kinetic studies of single model catalysts — •Thomas Häring, Thomas Diemant, Zhong Zhao, Hubert Rauscher, and R. J. Behm — Abt. Oberflächemchemie und Katalyse, Universität Ulm, 89069 Ulm

We have designed and constructed a high pressure reaction cell for in-situ IR (PEM-IRAS) and kinetic measurements at pressures up to 100 mbar. The cell is attached to a UHV system equipped with standard facilities for sample preparation and characterization. The small volume of the cell and the low leak rate over the differentially pumped seal allows to follow reactions under batch conditions for several hours; well-defined gas flow rates can be established by calibrated capillaries. We present details of the setup of the reaction cell and discuss the performance of the system.