Rh-CeO

Alessandro Trovarelli, Giuliano Dolcetti, Carla De Leitenburg, Jan Kašpar, Paola Finetti, Antonino Santoni

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Abstract

The effects of the high-temperature reduction of Rh/CeO2 catalyst on the hydrogenation of CO, CO2, acetone and ethene, and on the hydrogenolysis of ethane, in transient and continuous conditions, have been investigated. The high-temperature reduction (HTR) at 773 K induced a transient Rh-CeO2 interaction in the catalyst which enhances the rate of CO, CO2 and acetone hydrogenation. Temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) show the reduction of Ce4+ to Ce3+ after HTR in the near surface layers. We suggest that the oxygen vacancies on the support (i.e. presence of Ce3+) can interact with the CO moiety promoting its activation.
Original languageEnglish
Pages (from-to)1311 - 1319
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume88
Issue number9
DOIs
Publication statusPublished - 1992
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Cite this

Trovarelli, A., Dolcetti, G., De Leitenburg, C., Kašpar, J., Finetti, P., & Santoni, A. (1992). Rh-CeO. Physical Chemistry Chemical Physics, 88(9), 1311 - 1319. https://doi.org/10.1039/FT9928801311