Supported sub-nanometer Ta oxide clusters as model catalysts for the selective epoxidation of cyclooctene

Gregor Zwaschka, Manuel Rondelli, Maximilian Krause, Marian David Rötzer, Mohamed N. Hedhili, Ulrich Heiz, Jean-Marie Basset, Florian Schweinberger, Valerio D’Elia

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The preparation of organic ligands-free, isolated tantalum oxide atoms (Ta1) and small clusters (Tan>1) on flat silicate supports was accomplished by ultra-high vacuum (UHV) techniques followed by oxidation in air. The resulting surface complexes were thoroughly characterized and tested as supported catalysts for the epoxidation of cycloalkenes. The observed catalytic performance highlights the potential of the applied method for the production of active catalysts and the study of well-defined, ligand-free metal oxide moieties.
Original languageEnglish (US)
Pages (from-to)3035-3041
Number of pages7
JournalNew Journal of Chemistry
Issue number4
StatePublished - 2018

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KSA-C0069, UKC0020
Acknowledgements: This project was supported through collaboration with the KAUST Grant No. KSA-C0069/UKC0020); U.H. and F.F.S. acknowledge financial support through DFG project HE3454/23-1. V.D.E. acknowledges support through the Thailand Research Fund (Grant No. RSA6080059). The authors thank D.H. Anjum from the ‘Advanced Nanofabrication Imaging and Characterization’ lab at KAUST for his help in acquiring the STEM micrographs. Further we like to thank Prof. Schuster and co-workers at TUM for their fruitful discussions and clarifications in the field of trace analysis.


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