Some aspects of metal-support strong interactions in Rh/Al2O3 catalyst under oxidising and reducing conditions

Publication: Research - peer-reviewJournal article – Annual report year: 2006

Without internal affiliation

  • Author: Zimowska, M.

    Jagiellonian University in Kraków

  • Author: Wagner, Jakob Birkedal

    Fritz-Haber Institute of the Max-Planck-Society

  • Author: Dziedzic, J.

    Jagiellonian University in Kraków

  • Author: Camra, J.

    Jagiellonian University in Kraków

  • Author: Borzęcka-Prokop, B.

    Jagiellonian University in Kraków

  • Author: Najbar, M.

    Jagiellonian University in Kraków, Poland

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The aim of the Letter is to elucidate the nature of metal-support interaction in the 2wt% Rh/Al2O3 catalyst obtained by annealing Rh–O–Al xerogel at 1113K in air.XPS, HRTEM, and XRD results reveal that during the Rh–O–Al xerogel annealing in air, rhodium incorporates into forming alumina, which results mostly in Rh4+/δ-Al2O3 solid solution formation. However, in the course of the catalyst reduction at 773 with H2 and at 823K with CH4 the Rh4+/δ-Al2O3 solid solution transforms into Rh–Al alloy. The islands of rhodium form on the surface of the Rh–Al alloy nanocrystallites if the reduction is slow enough.
Original languageEnglish
JournalChemical Physics Letters
Volume417
Issue number1-3
Pages (from-to)137-142
Number of pages6
ISSN0009-2614
DOIs
StatePublished - 2006
Externally publishedYes
CitationsWeb of Science® Times Cited: 30
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