Effect of rhodium traces on the reducibility of silica-supported iron particles

Eric Bonnefille, Jean Marc M M Millet, Jean Pierre Candy, Jean Thivolle-Cazat, Roñan M. Bellabarba, Robert P. Tooze, Jean-Marie Basset

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Fe/SiO 2 and Rh-Fe/SiO 2 catalysts with increasing Fe/Rh ratio have been prepared and characterized by TEM, XRD, oxygen adsorption and Mössbauer spectroscopy. It was confirmed that Fe/SiO 2 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/SiO 2 + Rh/SiO 2 physical mixture (Fe/Rh B2,000). Therefore, the occurrence of a hydrogen spillover effect may be involved in the observed process. © 2012 Springer Science+Business Media, LLC.
Original languageEnglish (US)
Pages (from-to)984-990
Number of pages7
JournalCatalysis Letters
Volume142
Issue number8
DOIs
StatePublished - Jun 19 2012

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

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