TITLE: Infrarotspektroskopische Untersuchungen chemisorbierter Gase auf Metalloberflaechen zur Ermittlung des Mechanismus von katalytischen Reaktionen. Schlussbericht. (Infrared spectroscopy examination of chemically absorbed gases on metal surfaces to determine the mechanism of catalytic reactions. Final report)

AUTHOR: A.M. Bradshwaw.

INST.  AUTHOR: Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V., Berlin (Germany, F.R.). Fritz-Haber-Inst.

SPONSOR: Senator fuer Wirtschaft und Verkehr der Stadt Berlin (Germany, F.R.).

LANGUAGE: German

PUB.  TYPE: Technical Report

PUB.  COUNTRY: Germany Federal Republic

SOURCE: $fiz,  19 Jul 85,  72p.

NTIS ORDER NO.: TIB/A87-80364/INW

ABSTRACT:

As the development and choice of newcatalysts occurred empirically and expensively up to now, the aim of the research project was to clear up the microscopic steps in heterogeneous reactions, in order to be able to place catalytic research on a better theoretical foundation. The elementary steps of economically significant catalytic reactions (Fischer-Tropsch synthesis, detoxifying exhaust gas) was taken into account in th edefined conditions on single crystal surfaces in ultra-high vacuum. IR reflection absorption spectroscopy (IRAS) was used as the main method of investigation. The CO absorption on different metal surfaces, such as Ru(001), Pd(100), Pt(111), and copper was determined for the subject of detoxification of exhaust gas (CO oxidation and NO reaction) and for the Fischer-Tropsch synthesis (CO hydration). Simple decomposition with the example of formic acid adsorption was also examined. Using the IRAS and LEED results and exit work measurements, a hexagonal structure of the hydrogen bridge network adsorbate layer was proposed. (HWJ). (Copyright (c) 1987 by FIZ. Citation no. 87:080364).

CONTRACT  NUMBER: ERP 2377;   ERP 2444