Near ambient pressure photoemission (XPS) and infrared reflectance absorption spectroscopy (IRRAS) is used to investigate reaction intermediates on model planar catalysts for C1 conversion reactions. Of particular interest are Cu-based catalysts in combination with metal oxides such as ZrO2, ZnO and CeO2 for studies of CO2 hydrogenation to methanol. Mass-selected cluster deposition is used to deposit small Cun clusters onto metal oxide single crystals or thin film oxide supports combined with modifiers such as alkalis or a second metal oxide. The combination of NAP-XPS and IRRAS allows identification of the surface intermediates under reaction conditions that can provide mechanistic insight and probe the role of the metal and oxide components in the reaction. Recent work on CO2 hydrogenation on model catalysts composed of ultra-small Cun clusters (n = 1-4) supported on ZnO and ZrO2/ZnO supports will be presented.

Investigations of reaction intermediates for CO2 hydrogenation on model catalysts

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