Cyclohexane Oxidative Dehydrogenation on Graphene-Oxide-Supported Cobalt Ferrite Nanohybrids: Effect of Dynamic Nature of Active Sites on Reaction Selectivity

Kadam, Shashikant Arun; Sandoval, S.; Bastl, Zdeněk; Simkovičová, Karolína; Kvítek, L.; Jašík, Juraj; Olszówka, Joanna Elżbieta; Valtera, Stanislav; Vaidulych, Mykhailo; Morávková, Jaroslava; Sazama, Petr; Kubička, D.; Travert, A.; van Bokhoven, J. A.; Fortunelli, A.; Kleibert, A.; Kalbáč, Martin; Vajda, Štefan

doi:https://dx.doi.org/10.1021/acscatal.3c02592

Počet záznamů: 1

Cyclohexane Oxidative Dehydrogenation on Graphene-Oxide-Supported Cobalt Ferrite Nanohybrids: Effect of Dynamic Nature of Active Sites on Reaction Selectivity

1.

SYSNO ASEP	0577175
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Cyclohexane Oxidative Dehydrogenation on Graphene-Oxide-Supported Cobalt Ferrite Nanohybrids: Effect of Dynamic Nature of Active Sites on Reaction Selectivity
Tvůrce(i)	Kadam, Shashikant Arun (UFCH-W) Sandoval, S. (ES) Bastl, Zdeněk (UFCH-W)_{RID, ORCID} Simkovičová, Karolína (UFCH-W)_ORCID Kvítek, L. (CZ) Jašík, Juraj (UFCH-W)_{ORCID, RID} Olszówka, Joanna Elżbieta (UFCH-W)_ORCID Valtera, Stanislav (UFCH-W)_{ORCID, RID} Vaidulych, Mykhailo (UFCH-W)_{ORCID, RID} Morávková, Jaroslava (UFCH-W)_{RID, ORCID} Sazama, Petr (UFCH-W)_{RID, ORCID} Kubička, D. (CZ) Travert, A. (FR) van Bokhoven, J. A. (CH) Fortunelli, A. (IT) Kleibert, A. (CH) Kalbáč, Martin (UFCH-W)_{RID, ORCID} Vajda, Štefan (UFCH-W)_{RID, ORCID}
Zdroj.dok.	ACS Catalysis. - : American Chemical Society - ISSN 2155-5435 Roč. 13, č. 20 (2023), s. 13484-13505
Poč.str.	22 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	spinel ; CoFe2O4 ; rgo ; cyclohexane ; oxidativedehydrogenation ; xpeem ; support effects in catalysis ; dynamic active sites
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
Obor OECD	Physical chemistry
CEP	8J22FR025 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	EF16_013/0001821 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	LM2023066 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	GX20-08633X GA ČR - Grantová agentura ČR
Způsob publikování	Open access
Institucionální podpora	UFCH-W - RVO:61388955
UT WOS	001079423700001
EID SCOPUS	85176120698
DOI	https://doi.org/10.1021/acscatal.3c02592
Anotace	In this work, we investigated cyclohexane oxidative dehydrogenation (ODH) catalyzed by cobalt ferrite nanoparticles supported on reduced graphene oxide (RGO). We aim to identify the active sites that are specifically responsible for full and partial dehydrogenation using advanced spectroscopic techniques such as X-ray photoelectron emission microscopy (XPEEM) and X-ray photoelectron spectroscopy (XPS) along with kinetic analysis. Spectroscopically, we propose that Fe3+/T(d )sites could exclusively produce benzene through full cyclohexane dehydrogenation, while kinetic analysis shows that oxygen-derived species (O*) are responsible for partial dehydrogenation to form cyclohexene in a single catalytic sojourn. We unravel the dynamic cooperativity between octahedral and tetrahedral sites and the unique role of the support in masking undesired active (Fe3+/T-d) sites. This phenomenon was strategically used to control the abundance of these species on the catalyst surface by varying the particle size and the wt % content of the nanoparticles on the RGO support in order to control the reaction selectivity without compromising reaction rates which are otherwise extremely challenging due to the much favorable thermodynamics for complete dehydrogenation and complete combustion under oxidative conditions.
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/11104/0346399

Počet záznamů: 1