Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 782 - 789 (1980)
Update date:2022-08-17
Topics:
Guczi, Laszlo
Kemeny, Gabor
Matusek, Karoly
Mink, Janos
Engels, Siegfrid
Moerke, Wolfgang
Magnetic measurements on the PtFe/SiO2 system revealed a completely reduced form of iron in platinum-iron clusters at iron concentrations of up to 40 atom %, whereas at 70 atom % iron, part of the iron could not be reduced. These results are in good agreement with an earlier Moessbauer study in our laboratory. The infrared spectra of CO adsorbed on PtFe/SiO2 were measured and an ≈ 100 cm-1 shift was found in the lower characteristic band, which is assigned to strongly adsorbed Pt + CO species. Catalytic reactions of propene have been carried out on Pt/SiO2 and 70 atom % iron containing catalyst. Three reactions, hydrogenation, dimerization to produce benzene and cracking take place. On iron rich catalysts the selectivity for benzene formation and for hydrogenation is high, while on platinum rich catalysts methane formation is the main reaction.
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