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Hexairidium carbonyl clusters in the micropores of faujasite zeolites: evidence from transmission electron microscopy

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Abstract

[Ir6(CO)16] was formed in the pores of zeolite NaY by adsorption of [Ir(CO)2(acac)] followed by treatment in CO + H2. [Ir6(CO)15]2− in zeolite NaX was prepared similarly. Each sample was characterized by high‐resolution transmission electron microscopy. The images indicate the presence of the iridium clusters in the zeolite micropores, with almost no scattering centers indicating iridium outside these pores. The supported [Ir6(CO)16] and [Ir6(CO)15]2−, which have previously been characterized by infrared and extended X‐ray absorption fine structure spectroscopies, are among the most uniform and structurally best defined supported metal clusters.

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Authors and Affiliations

  1. Max‐Planck‐Institute für Kohlenforschung, Kaiser‐Wilhelm‐Platz, 45470, Mülheim/Ruhr, Germany

    B. Tesche

  2. Center for Catalytic Science and Technology, Department of Chemical Engineering, University of Delaware, Newark, DE, 19716, USA

    S. Kawi & B.C. Gates

  3. Department of Chemical Engineering and Materials Science, University of California, Davis, CA, 95616, USA

    S. Kawi & B.C. Gates

Authors
  1. B. Tesche
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  2. S. Kawi
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  3. B.C. Gates
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Tesche, B., Kawi, S. & Gates, B. Hexairidium carbonyl clusters in the micropores of faujasite zeolites: evidence from transmission electron microscopy. Catalysis Letters 70, 57–60 (2000). https://doi.org/10.1023/A:1019039921935

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