Effect of rhodium traces on the reducibility of silica-supported iron particles
Millet, Jean Marc M M
Candy, Jean Pierre
Bellabarba, Roñan M.
Tooze, Robert P.
KAUST DepartmentChemical Science Program
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Online Publication Date2012-06-19
Print Publication Date2012-08
Permanent link to this recordhttp://hdl.handle.net/10754/565973
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AbstractFe/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.
CitationBonnefille, E., Millet, J.-M. M., Candy, J.-P., Thivolle-Cazat, J., Bellabarba, R., Tooze, R., & Basset, J.-M. (2012). Effect of Rhodium Traces on the Reducibility of Silica-Supported Iron Particles. Catalysis Letters, 142(8), 984–990. doi:10.1007/s10562-012-0853-x