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- W2154285414 abstract "Very small (about 1 nm) and homogeneous Pt-Ir bimetallic clusters were formed in the zeolite supercage by calcining NaY co-ion-exchanged with Pt(NH3)2+4 and Ir(NH3)5C12+ at room temperature and subsequent reduction treatment with H2 at 573 K. These bimetallic clusters were characterized by hydrogen and xenon adsorption, X-ray differaction (XRD), 129Xe NMR spectroscopy, and ethane hydrogenolysis reaction. Pt-Ir bimetallic clusters showed specific characteristics different from those of Pt and Ir monometallic clusters and physical mixtures of corresponding monometallic clusters. The chemical shifts of Pt-Ir bimetallic clusters in 129Xe NMR and their catalytic activities in ethane hydrogenolysis were lower than those of the corresponding physical mixtures of Pt and Ir monometallic clusters. The activation energies of Pt-Ir bimetallic clusters in ethane hydrogenolysis were smaller than those of monometallic Pt and Ir clusters. The turnover frequencies (TOFs) of bimetallic clusters in ethane hydrogenolysis are widely different from those of monometallic clusters." @default.
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- W2154285414 date "1992-10-01" @default.
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- W2154285414 title "Formation of small Pt-Ir bimetallic clusters in NaY zeolite probed with 129Xe NMR spectroscopy and ethane hydrogenolysis" @default.
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- W2154285414 doi "https://doi.org/10.1016/0021-9517(92)90163-c" @default.
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