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Structure sensitivity of Fe(II) oxidation on palladium and platinum catalysts

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Abstract

The oxidation of ferrous sulfate with dioxygen, an example of an inorganic redox process in aqueous phase, has been studied on a number of carbon-supported Pd and Pt catalysts, both freshly reduced and kept for a long time after contacting with air. In the whole range of metal dispersities studied (0.10–0.75, as determined by CO chemisorption) a several-fold gradual loss of intrinsic activity has been found when increasing the dispersity. Such a decrease appeared sufficient to present volcanotype plots for the corresponding activities on a per-gram basis. It has been concluded that the metal particle size and oxidation state of the metallic surface are two independently acting factors which affect the intrinsic rate.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, 630090, Novosibirsk, Russia

    L. B. Chlopkova, A. S. Lisitsyn, N. I. Kuznetsova & V. A. Likholobov

Authors
  1. L. B. Chlopkova
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  2. A. S. Lisitsyn
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  3. N. I. Kuznetsova
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  4. V. A. Likholobov
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Chlopkova, L.B., Lisitsyn, A.S., Kuznetsova, N.I. et al. Structure sensitivity of Fe(II) oxidation on palladium and platinum catalysts. React Kinet Catal Lett 52, 385–392 (1994). https://doi.org/10.1007/BF02067812

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  • DOI: https://doi.org/10.1007/BF02067812

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