Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 81: Gerhard Ertl Young Investigator Award

O 81.1: Vortrag

Donnerstag, 19. März 2015, 10:30–11:00, MA 042

Caught in the act! Live observations of catalysts using high-pressure scanning probe microscopy — •Irene M.N. Groot¹ and Joost W.M. Frenken² — ¹Huygens-Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9502, 2300 RA Leiden, the Netherlands — ²Advanced Research Center for Nanolithography, P.O. Box 41883, 1009 DB Amsterdam, the Netherlands

Recently it has become clear that essential differences can exist between the behavior of catalysts under industrial conditions (high pressure and temperature) and the (ultra) high vacuum (UHV) conditions of traditional laboratory experiments. These observations made it clear that meaningful results can only be obtained at high pressures and temperatures. However, most of the techniques traditionally used to study catalysts were designed to operate under UHV conditions.

This talk focuses on the development of scanning probe microscopy for operando observations of active model catalysts. We have developed set-ups that combine a UHV environment with a high-pressure flow reactor cell, integrated with scanning probe microscopy and mass spectrometry. In this way, we can correlate structural changes of the catalyst with its catalytic performance.

This talk highlights a short overview of the instruments we developed. Some results for CO oxidation will be shown. But additionally, results for a more complex reaction, production of chlorine, will be discussed.