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Atom by atom built subnanometer copper cluster catalyst for the highly selective oxidative dehydrogenation of cyclohexene
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SYSNO ASEP 0556027 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Atom by atom built subnanometer copper cluster catalyst for the highly selective oxidative dehydrogenation of cyclohexene Author(s) Valtera, Stanislav (UFCH-W) ORCID, RID
Jašík, Juraj (UFCH-W) ORCID, RID
Vaidulych, Mykhailo (UFCH-W) ORCID, RID
Olszówka, Joanna Elżbieta (UFCH-W) ORCID
Zlámalová, Magda (UFCH-W) RID, ORCID, SAI
Tarábková, Hana (UFCH-W) RID, ORCID
Kavan, Ladislav (UFCH-W) RID, ORCID
Vajda, Štefan (UFCH-W) RID, ORCIDArticle number 114302 Source Title Journal of Chemical Physics. - : AIP Publishing - ISSN 0021-9606
Roč. 156, č. 11 (2022)Number of pages 10 s. Language eng - English Country US - United States Keywords cyclic hydrocarbons ; thin films ; hydrogenation Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000781048500001 EID SCOPUS 85126883776 DOI 10.1063/5.0065350 Annotation The effect of particle size and support on the catalytic performance of supported subnanometer copper clusters was investigated in the oxidative dehydrogenation of cyclohexene. From among the investigated seven size-selected subnanometer copper particles between a single atom and clusters containing 2–7 atoms, the highest activity was observed for the titania-supported copper tetramer with 100% selectivity toward benzene production and being about an order of magnitude more active than not only all the other investigated cluster sizes on the same support but also the same tetramer on the other supports, Al2O3, SiO2, and SnO2. In addition to the profound effect of cluster size on activity and with Cu4 outstanding from the studied series, Cu4 clusters supported on SiO2 provide an example of tuning selectivity through support effects when this particular catalyst also produces cyclohexadiene with about 30% selectivity. Titania-supported Cu5 and Cu7 clusters supported on TiO2 produce a high fraction of cyclohexadiene in contrast to their neighbors, while Cu4 and Cu6 solely produce benzene without any combustion, thus representing odd–even oscillation of selectivity with the number of atoms in the cluster. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2023 Electronic address http://hdl.handle.net/11104/0330392
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