Zeolite with finely dispersed metal particles

Fig. 69. 129Xe NMR spectra at 24.9 MHz of xenon adsorbed on zeolite Na-Y containing finely dispersed metal particles with and without preadsorbed ethylene (341). Spectrum 1, Pt4-Na-Y 2, Pt4-Na-Y + C2H4 at 25°C 3, Pt4-Na-Y + C2H4 at 60°C. Chemical shifts are in ppm from xenon gas at zero pressure.

The choice of topics dealt with in this text refiects essentially the interests and experience of the author. It encompassed the applications of XPS and Auger spectroscopies to the elements constituting the zeolite lattice, to counter-ions and to probe molecules. This has left aside the very large applications of surface sciences to materials supported or occluded in the zeolitic pore lattice. These materials include highly dispersed metallic particles, finely spread oxidic phases, entrapped organo-metallic complexes or metallic clusters. To some extent however the analysis of the supported phase is not specific of the... 

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