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Correlation between CO frequency and Pt coordination number. A DRIFT study on supported Pt catalysts

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Abstract

The infrared stretching frequencies of linear-bonded carbon monoxide on face, edge and corner atoms have been identified with four platinum catalysts. The metal particles were supported on different absorbentia and each having a different average particle size, ranging from about 10 to 200 Å. The\(\tilde v_{CO}\) values of the various absorption bands correlate linearly with the number of nearest neighbours of the different surface sites (n in C n ). Effects of an interaction between Pt clusters and support on the linear-CO stretching frequency have not been observed. This empirical correlation between\(\tilde v_{CO}\) and Cn, and the advantages ofin situ Diffuse Reflectance Fourier transform Infrared Spectroscopy in combination with derivative spectrometry opens the possibility to monitor the dispersity of supported platinum in a simple and relatively quick way.

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Authors and Affiliations

  1. Department of Analytical Molecule Spectrometry, Faculty of Chemistry, University of Utrecht, P.O. Box 80083, 3508, TB Utrecht, The Netherlands

    M. J. Kappers & J. H. van der Maas

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  1. M. J. Kappers
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  2. J. H. van der Maas
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Kappers, M.J., van der Maas, J.H. Correlation between CO frequency and Pt coordination number. A DRIFT study on supported Pt catalysts. Catal Lett 10, 365–373 (1991). https://doi.org/10.1007/BF00769171

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  • DOI: https://doi.org/10.1007/BF00769171

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