In-situ FTIR characterization of Pt particles on modified alumina:geometric and electronic effects due to dopant ions

N. Zanier-Szydlowski; B. Moisson; F. Blejean; B. Didillon

doi:10.1117/12.166638

31 January 1994 In-situ FTIR characterization of Pt particles on modified alumina:geometric and electronic effects due to dopant ions

N. Zanier-Szydlowski, B. Moisson, F. Blejean, B. Didillon

Author Affiliations +

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166638
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

The addition of alkali promoters to heterogeneous catalysts has been known to improve their properties; this is the case for dehydrogenation catalysts where alumina supported Pt is generally promoted with Li and K¹. For this kind of reaction, addition of foreign cations was performed to neutralize support acidic sites which catalyze unwanted reactions such as cracking, isomerization and coke formation. But the promoters can also affect the supported metal properties and thus change its catalytic behavior and selectivity. In order to elucidate the variation of accessibility and/or electronic state of Pt supported on modified alumina, we have studied the influence of anions and cations on Pt properties for a series of catalysts by in-situ FTIR spectroscopy of chemisorbed CO.

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N. Zanier-Szydlowski, B. Moisson, F. Blejean, and B. Didillon "In-situ FTIR characterization of Pt particles on modified alumina:geometric and electronic effects due to dopant ions", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166638

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