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Effect of Rhodium Traces on the Reducibility of Silica-Supported Iron Particles

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Abstract

Fe/SiO2 and Rh–Fe/SiO2 catalysts with increasing Fe/Rh ratio have been prepared and characterized by TEM, XRD, oxygen adsorption and Mössbauer spectroscopy. It was confirmed that Fe/SiO2 catalysts cannot be reduced under hydrogen flow, to more than 50 % whatever the temperature in the 200–500 °C range and shown that the presence of even a small amount of Rh (Fe/Rh ≤2,000) promoted the reduction of iron up to 85–95 %. This promoting effect also took place with a Fe/SiO2 + Rh/SiO2 physical mixture (Fe/Rh ≤2,000). Therefore, the occurrence of a hydrogen spillover effect may be involved in the observed process.

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Author notes

  1. Jean-Marie Basset

    Present address: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia

Authors and Affiliations

  1. ICL, C2P2 UMR 5265 (CNRS-CPE-Université Lyon 1) LCOMS-CPE-Lyon, Université de Lyon, 43 Boulevard du 11 Novembre 1918, 69616, Villeurbanne, France

    Eric Bonnefille, Jean-Pierre Candy & Jean Thivolle-Cazat

  2. Institut de Recherches sur la Catalyse et l’Environnement de Lyon IRCELYON, UMR5256 CNRS-Université de Lyon, 2 Avenue A. Einstein, 69626, Villeurbanne, France

    Jean-Marc M. Millet

  3. Sasol Technology (UK) Ltd, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST, UK

    Ronan Bellabarba & Robert Tooze

Authors
  1. Eric Bonnefille
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  2. Jean-Marc M. Millet
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  3. Jean-Pierre Candy
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  4. Jean Thivolle-Cazat
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  5. Ronan Bellabarba
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  7. Jean-Marie Basset
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Correspondence to Jean Thivolle-Cazat.

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Bonnefille, E., Millet, JM.M., Candy, JP. et al. Effect of Rhodium Traces on the Reducibility of Silica-Supported Iron Particles. Catal Lett 142, 984–990 (2012). https://doi.org/10.1007/s10562-012-0853-x

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  • DOI: https://doi.org/10.1007/s10562-012-0853-x

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