Počet záznamů: 1
Oxidative dehydrogenation of cyclohexene on atomically precise subnanometer Cu4-nPdn (0 <= n <= 4) tetramer clusters: the effect of cluster composition and support on performance
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SYSNO ASEP 0562674 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Oxidative dehydrogenation of cyclohexene on atomically precise subnanometer Cu4-nPdn (0 <= n <= 4) tetramer clusters: the effect of cluster composition and support on performance Tvůrce(i) Jašík, Juraj (UFCH-W) ORCID, RID
Valtera, Stanislav (UFCH-W) ORCID, RID
Vaidulych, Mykhailo (UFCH-W) ORCID, RID
Bunian, M. (US)
Lei, Y. (US)
Halder, A. (US)
Tarábková, Hana (UFCH-W) RID, ORCID
Jindra, Martin (UFCH-W) ORCID
Kavan, Ladislav (UFCH-W) RID, ORCID
Frank, Otakar (UFCH-W) RID, ORCID
Bartling, S. (DE)
Vajda, Štefan (UFCH-W) RID, ORCIDZdroj.dok. Faraday Discussions. - : Royal Society of Chemistry - ISSN 1359-6640
Roč. 242, JAN 2023 (2023), s. 70-93Poč.str. 24 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova PALLADIUM CLUSTERS ; PARTICLE-SIZE ; STRUCTURE SENSITIVITY Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP EF16_026/0008382 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000865531400001 EID SCOPUS 85141075143 DOI 10.1039/d2fd00108j Anotace The pronounced effects of the composition of four-atom monometallic Cu and Pd and bimetallic CuPd clusters and the support on the catalytic activity and selectivity in the oxidative dehydrogenation of cyclohexene are reported. The ultra-nanocrystalline diamond supported clusters are highly active and dominantly produce benzene, some of the mixed clusters also produce cyclohexadiene, which are all clusters with a much suppressed combustion channel. The also highly active TiO2-supported tetramers solely produce benzene, without any combustion to CO2. The selectivity of the zirconia-supported mixed CuPd clusters and the monometallic Cu cluster is entirely different, though they are less active in comparison to clusters with other supports, these clusters produce significant fractions of cyclohexadiene, with their selectivity towards cyclohexadiene gradually increasing with the increasing number of copper atoms in the cluster, reaching about 50% for Cu3Pd1. The zirconia-supported copper tetramer stands out from among all the other tetramers in this reaction, with a selectivity towards cyclohexadiene of 70%, which far exceeds those of all the other cluster-support combinations. The findings from this study indicate a positive effect of copper on the stability of the mixed tetramers and potential new ways of fine-tuning catalyst performance by controlling the composition of the active site and via cluster-support interactions in complex oxidative reactions under the suppression of the undesired combustion of the feed. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2024 Elektronická adresa https://hdl.handle.net/11104/0334928
Počet záznamů: 1