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30 April 1998 In-situ investigation of catalytic reactions with second harmonic generation
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Most knowledge on catalytic reaction mechanisms has up until now been gathered with UHV-based techniques. The extrapolation of such obtained reaction parameters to the pressure range of real application conditions is called the pressure gap. The nonlinear optical technique Second Harmonic Generation (SHG) allows studies covering the whole pressure range between UHV and application pressures. Of special importance for this purpose is the possibility to distinguish coverages of different adsorbates. In this work we show how the application of phase sensitive SHG can be used to determine coverages of different adsorbates in-situ allowing the determination of important reaction parameters. Our choice of reaction is the catalytic water formation on platinum which is already widely investigated in the literature.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank Eisert, Alf-Peter C. Elg, and Arne Rosen "In-situ investigation of catalytic reactions with second harmonic generation", Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998);

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