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State of platinum in zirconia and sulfated zirconia catalysts

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Abstract

Platinum is present in a metallic state following activation in air at 725‡C of both 5 wt% Pt/ZrO2 and 5 wt% Pt/SO 2−4 /ZrO2. Reduction of either catalyst at 725‡C produces a Pt-Zr alloy, and these reduced catalysts, upon recalcination in air at 725‡C, form metallic Pt crystallites. Likewise, reduction of these uncalcined catalysts at 725‡C in H2 leads to a Pt-Zr alloy formation. However, treatment of these uncalcined catalysts in H2 at 450‡C does not produce Pt crystallites large enough to detect by XRD.

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Authors and Affiliations

  1. Center for Applied Energy Research, University of Kentucky, 3572 Iron Works Pike, 40511, Lexington, KY, USA

    Ram Srinivasan, Dennis E. Sparks & Burtron H. Davis

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  1. Ram Srinivasan
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  2. Dennis E. Sparks
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  3. Burtron H. Davis
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Srinivasan, R., Sparks, D.E. & Davis, B.H. State of platinum in zirconia and sulfated zirconia catalysts. Catal Lett 40, 167–173 (1996). https://doi.org/10.1007/BF00815278

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  • DOI: https://doi.org/10.1007/BF00815278

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