Catalytic behaviour of polycrystalline Pt3Ti in relation to strong metal-support interaction phenomenon |
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| Authors: | A Dauscher W Müller G Maire |
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| Affiliation: | (1) Laboratoire de Catalyse et Chimie des Surfaces, U.A. 423 du C.N.R.S., Université Louis Pasteur, 4 rue Blaise Pascal, 67070 Strasbourg, France;(2) Commission of the European Communities, Joint Research Centre, B-2440 Steenweg naar Retie, Belgium |
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| Abstract: | Skeletal isomerization reactions, of hexanes (2-methylpentane and methylcyclopentane) have been carried out in a flow reactor on a polycrystalline intermetallic Pt3Ti compound which has been powdered and treated under several oxidative and reductive conditions. The results are compared to those obtained with (i) TiO2 supported Pt catalysts in or not in the Strong Metal-Support Interaction (SMSI) state, (ii) a bulk Pt3Ti sample studied under static catalytic conditions in an U.H.V. apparatus, and (iii) bulk Pt surfaces. The powdered Pt3Ti compound shows a very unstable behaviour under hydrogen. Differences in behaviour between the bulk and the decomposed powdered Pt3Ti samples are observed, showing the important part played by Pt3Ti in SMSI phenomena. A model is then proposed. |
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