Infrared absorption spectroscopy has been used in our laboratory to study a number of catalytic systems, from model flat surfaces to catalysts with novel nanostructures, under in situ and operando conditions, and in both gas and liquid phases in contact with the solids.  A few representative examples of these applications will be discussed in this presentation.  Adsorption on single crystals and on flat polycrystalline metal foils has been probed by reflection-absorption infrared spectroscopy (RAIRS) under ultrahigh vacuum, in operando conditions in the presence of reactants at atmospheric pressures during olefin hydrogenation catalysis, and in situ at the liquid/solid interface to characterize the adsorption of chiral catalytic modifiers.  In transmission mode, IR has been used to probe diffusion through different nanostructures, including dendrimers and silica and titania shells.  Finally, diffuse-reflectance (DRIFT) IR absorption spectroscopy has been employed to follow the oxidation of CO promoted by yolk-shell nanocatalysts.

In-situ characterization of catalysts with infrared absorption spectroscopy: From model systems to nanostructured catalysts in liquid phase

248th National Meeting (2014)

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