Abstract
Infrared spectroscopy is a powerful technique to study the adsorption of molecules on well-defined metal surfaces or on metal supported on oxides. In particular for metal characterization. CO is frequently used as the probe molecule because of the high absorption coefficient of the v(CO) mode and the sensitivity of its frequency to the oxidation state of the site, to its geometry and to its coordinative unsaturation degree. For spectra interpretation, it is important to take into account the dipolar coupling effects which induce wavenumber shifts and intensity transfer. In particular, caution should be taken in the characterization of defect sites. By following frequency shifts for various coverages, bandwidths and intensities, CO allows us to specify whether probe molecules form islands or are well-dispersed on the surface. Some examples of all these features are developed for single crystals and for supported metals.
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© 1997 Springer-Verlag Berlin Heidelberg
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Maugé, F., Binet, C., Lavalley, J.C. (1997). IR Characterization of Metal Catalysts using CO as Probe Molecule. In: Renouprez, A.J., Jobic, H. (eds) Catalysis by Metals. Centre de Physique des Houches, vol 6. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-06221-0_1
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DOI: https://doi.org/10.1007/978-3-662-06221-0_1
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