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Mössbauer analysis of the state of iridium and platinum in supported catalysts

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Abstract

The state of iridium and platinum in supported noble metal catalysts was investigated by Mössbauer spectroscopy. With iridium, conventional absorption experiments with the 73 KeV γ-rays of193Ir were preformed; platinum was studied in source experiments using the 77 KeV resonance in197Au. First results for pure Pt catalysts on silica supports and for a used automotive catalytic converter are presented. In Pt-rich bimetallic Pt−Ir catalysts on amorphous silica, both Pt and Ir were studied after different treatments.

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Authors and Affiliations

  1. Physics Department, Technical University of Munich, D-8046, Garching, W.-Germany

    H. v. Brandis & F. E. Wagner

  2. Chalk River Nuclear Laboratories, K0J 1J0, Chalk River, Ontario, Canada

    J. A. Sawicki & J. H. Rolston

Authors
  1. H. v. Brandis
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  2. F. E. Wagner
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  3. J. A. Sawicki
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  4. J. H. Rolston
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v. Brandis, H., Wagner, F.E., Sawicki, J.A. et al. Mössbauer analysis of the state of iridium and platinum in supported catalysts. Hyperfine Interact 46, 575–582 (1989). https://doi.org/10.1007/BF02398245

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