Effect of ion exchange by an organic cation on platinum immobilization on clays |
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Authors: | György Szöllsi Ágnes Mastalir and Mihály Bartók |
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Institution: | (1) Organic Catalysis Research Group of the Hungarian Academy of Sciences, Department of Organic Chemistry, University of Szeged, Szeged, Hungary;(2) Department of Organic Chemistry, University of Szeged, Szeged, Hungary |
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Abstract: | Clay-supported platinum catalysts were prepared by ion exchange. The platinum precursor has been reduced either in the presence or in the absence of cinchonidinium cations introduced in the interlamellar space of the cationic clay. The samples were characterized by XRD and TEM. Reduction by NaBH4 in the absence of cinchonidinium cations and the subsequent introduction of this latter ensured the formation of monodispersed, small platinum crystallites immobilized mostly between the clay sheets. On the other hand, reduction in the presence of the organic cations resulted in migration of the platinum particles on the external surface of the clay. |
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Keywords: | Cationic clay ion exchange platinum cinchonidinium cation |
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