Mainz 2017 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 7: Poster

MS 7.4: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG1

Kinetic and mechanistic reaction studies of metal clusters under multi-collision conditions — •Martin Tschurl, Jan Frederik Eckhard, Tsugunosuke Masubuchi, Daniel Neuwirth, and Ueli Heiz — Technical University of Munich, Chair of Physical Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany

The reactions of metal and metal oxide clusters are studied in the gas-phase due to their nature as model catalysts. Important phenomena relevant for catalytic processes, e.g. C-C coupling and overcoming activation barriers, may be observed when these reactions are conducted under multi-collision conditions. We present a setup in which clusters are produced by a laser vaporization source, size-selected in a quadrupole mass filter and stored within a cryogenic ring electrode ion trap. Due to the buffer gas pressure, ions inside the trap are constantly thermalized. The reaction product intensities are analyzed by a reflectron time-of-flight mass spectrometer as a function of reaction time. Consequently, the kinetics and activation energy of each reaction step can be determined. Results concerning the cluster generation and analysis of their reaction properties will be presented.