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Electrochemical Promotion by Potassium of Rh-Catalysed Fischer–Tropsch Synthesis at High Pressure

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Rh-catalysed Fischer–Tropsch synthesis at high pressures exhibits reversible electrochemical promotion by potassium. At 473 K and 14 bar, 43 products were detected, comprising alkanes, alkenes and primary alcohols. Potassium increased selectivity towards alkenes and primary alcohols as a result of actual increases in the rates of formation of these products – an apparently unprecedented observation. Alkane formation was progressively suppressed by added alkali. These findings are discussed in terms of K-induced acceleration and retardation of possible rate limiting steps for alkene and alkane formation, respectively. Plausible mechanisms are discussed.

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Authors and Affiliations

  1. Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, England

    Andrew J. Urquhart, Federico J. Williams & Richard M. Lambert

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  1. Andrew J. Urquhart
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  2. Federico J. Williams
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  3. Richard M. Lambert
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Correspondence to Richard M. Lambert.

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Urquhart, A., Williams, F. & Lambert, R. Electrochemical Promotion by Potassium of Rh-Catalysed Fischer–Tropsch Synthesis at High Pressure. Catal Lett 103, 137–141 (2005). https://doi.org/10.1007/s10562-005-6519-1

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