Copper nanoparticles in zeolite Y

A. Seidel, J. Loos, B. Boddenberg

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    CuCl has been dispersed in the supercages of a Y-type zeolite by heating a mechanical salt/host mixture in vacuo. The occluded salt was subsequently reduced to copper metal in a hydrogen atmosphere. Virtually complete reduction of the salt is achieved at 460°C. Under the same conditions, extraframework copper(II) ions, exchanged into zeolite NaY, are only partly reduced. The copper forms nanoaggregates of narrow size distribution inside the zeolite pore system; the average particle diameter is 5 nm. Our data suggest that these nanoparticles consist of several interconnected copper assemblies of supercage (diameter 1.2 nm) size. A small fraction of the salt remains at the outer surface of the zeolite crystallites in the inclusion step, and there produces larger copper metal particles upon reduction with H2.
    Originele taal-2Engels
    Pagina's (van-tot)2495-2498
    TijdschriftJournal of Materials Chemistry
    Nummer van het tijdschrift10
    StatusGepubliceerd - 1999


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