Abstract
The activities of 0.5% Pt/H-ZSM-5 and 0.5% Pt/0.75% Cr/H-ZSM-5 catalysts for alkane hydrogenolysis have been compared. The presence of chromium suppresses propane hydrogenolysis by an order of magnitude, but has a much less pronounced effect on ethane hydrogenolysis. Catalyst characterisation by EXAFS and XPS indicates the formation of small alloy particles, typically containing 10 platinum and 3 chromium atoms. The change in catalytic activity is related to electronic structure modification rather than to an ensemble effect.
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Joyner, R.W., Minachev, K.M., Pudney, P.D.A. et al. Structure-function relationships in Pt-Cr-H-ZSM-5 alloy catalysts. Catal Lett 5, 257–264 (1990). https://doi.org/10.1007/BF00764670
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DOI: https://doi.org/10.1007/BF00764670