Acrylate and propoxy-groups: Contributors to deactivation of Au/TiO2 in the epoxidation of propene

Aida Ruiz, Bart van der Linden, Michiel Makkee*, Guido Mul

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

41 Citations (Scopus)

Abstract

Reaction pathways of propene in the selective propene epoxidation over Au/TiO2 are discussed on the basis of in-situ IR spectra. A non-selective route for conversion of propene via acrylate to carboxylates and carbonates is demonstrated, likely contributing to catalyst deactivation. Propoxy-groups are predominantly formed by reaction of the catalyst surface with the reaction product propene oxide (PO), and are highly stable under reaction conditions. These propoxy-groups are considered as deactivating species, and not as intermediates for the production of PO, or carboxylates and carbonates.
Original languageEnglish
Pages (from-to)286-290
JournalJournal of catalysis
Volume266
Issue number2
DOIs
Publication statusPublished - 2009
Externally publishedYes

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