Support Preparation and Characterization

The following procedures have been applied for the cleaning and/or preparation of the supports. Representative EES spectra are shown in the appendix in Sect. A. 1.6 and are in agreement with the literature. 

The MgO(lOO) thin film was prepared accordingly to the literature [36], by evaporation of Mg (99.5 % purity, Merck Germany) in an oxygen back pressure (T = 600 K, p(02) = 5 X 10 mbar. At = 12 min) at an approximate growth rate of IML/min and was reordered by subsequent annealing (T = 800 K). Recorded AES and MIES/UPS spectra show the features known from published data [35, 55-57]. 

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Catalysts based on RhMo6 heteropolymetallates. Bulk and supported preparation and characterization. 

Characterization and analysis are performed using the following surface science techniques temperature programmed desorption/reaction (TPD/TPR), pulsed molecular beam reactive scattering (pMBRS) (IRRAS), metastable impact electron spectroscopy (MIES), ultraviolet photoelectron spectroscopy (UPS) and auger electron spectroscopy (AES). First the experimental setup is briefly described, followed by the support preparation and characterization as well procedures utilized in this work. These descriptions include a concise introduction to the underlying physical principles of the applied techniques (including experimental details). 

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