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Ceria nanoparticles’ morphological effects on the N 2 O decomposition performance of Co 3 O 4 /CeO 2 mixed oxides

Lykaki Maria, Papista Eleni, Kaklidis Nikolaos, Carabineiro, Sónia Alexandra Correia, Konsolakis Michail

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URIhttp://purl.tuc.gr/dl/dias/CE9D4792-305E-4A79-92B9-BB96BBDF0E1C-
Αναγνωριστικόhttps://doi.org/10.3390/catal9030233-
Αναγνωριστικόhttps://www.mdpi.com/2073-4344/9/3/233-
Γλώσσαen-
Μέγεθος19 pagesen
ΤίτλοςCeria nanoparticles’ morphological effects on the N 2 O decomposition performance of Co 3 O 4 /CeO 2 mixed oxidesen
ΔημιουργόςLykaki Mariaen
ΔημιουργόςΛυκακη Μαριαel
ΔημιουργόςPapista Elenien
ΔημιουργόςKaklidis Nikolaosen
ΔημιουργόςCarabineiro, Sónia Alexandra Correiaen
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
ΕκδότηςMDPIen
ΠερίληψηCeria-based oxides have been widely explored recently in the direct decomposition of N 2 O (deN 2 O) due to their unique redox/surface properties and lower cost as compared to noble metal-based catalysts. Cobalt oxide dispersed on ceria is among the most active mixed oxides with its efficiency strongly affected by counterpart features, such as particle size and morphology. In this work, the morphological effect of ceria nanostructures (nanorods (ΝR), nanocubes (NC), nanopolyhedra (NP)) on the solid-state properties and the deN 2 O performance of the Co 3 O 4 /CeO 2 binary system is investigated. Several characterization methods involving N 2 adsorption at −196 °C, X-ray diffraction (XRD), temperature programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (ΤΕΜ) were carried out to disclose structure-property relationships. The results revealed the importance of support morphology on the physicochemical properties and the N 2 O conversion performance of bare ceria samples, following the order nanorods (NR) > nanopolyhedra (NP) > nanocubes (NC). More importantly, Co 3 O 4 impregnation to different carriers towards the formation of Co 3 O 4 /CeO 2 mixed oxides greatly enhanced the deN 2 O performance as compared to bare ceria samples, without, however, affecting the conversion sequence, implying the pivotal role of ceria support. The Co 3 O 4 /CeO 2 sample with the rod-like morphology exhibited the best deN 2 O performance (100% N 2 O conversion at 500 °C) due to its abundance in Co 2+ active sites and Ce 3+ species in conjunction to its improved reducibility, oxygen kinetics and surface area.el
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2020-07-27-
Ημερομηνία Δημοσίευσης2019-
Θεματική ΚατηγορίαCeria nanoparticlesen
Θεματική ΚατηγορίαCo 3 O 4 /CeO 2 mixed oxidesen
Θεματική ΚατηγορίαDeN 2 O processen
Θεματική ΚατηγορίαMorphological effectsen
Βιβλιογραφική ΑναφοράM. Lykaki, E. Papista, N. Kaklidis, S.A.C. Carabineiro and M. Konsolakis, "Ceria nanoparticles’ morphological effects on the N 2 O decomposition performance of Co 3 O 4 /CeO 2 mixed oxides," Catalysts, vol. 9, no. 3, Mar. 2019. doi: 10.3390/catal9030233en

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