1996 heterogeneous catalysis, catalysts

heterogeneous catalysis, catalystsH 2000

20 - 005Further Studies of the Active Phase in Cs-Doped Fe-V-Oxide Cata-lysts. — Cs doping of catalytic Fe-V-O material by addition of Cs2SO4 priorto coprecipitation of NH4VO3 and FeCl3·6 H2O by addition of conc. NH3 leadsto a replacement of Fe by Cs which results in the formation of an amorphousphase containing oxide vacancies. These vacancies which are due to differencesin the ionic charge are important for the activation of dioxygen to oxide ionstaking part in the selective oxidation of polyaromatics such as anthracene andfluorene. The improved catalytic performance caused by Cs addition mayalso be attributed to a modification of the surface acidity. — (YORK, A. P.E.; BRUECKNER, A.; WOLF, G.-U.; WILDE, P.-M.; MEISEL, M.; Chem.Commun. (Cambridge) (1996) 2, 239-240; Inst. Angew. Chem.-Adlershof,D-12484 Berlin, Germany; EN)

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