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Effect of cobalt loading on the solid state properties and ethyl acetate oxidation performance of cobalt-cerium mixed oxides

Konsolakis Michail, Carabineiro, Sónia Alexandra Correia, Marnellos, Geōrgios E, Asad Muhammad Faizan, Soares Olívia Salomé Gonçalves Pinto, Pereira Manuel Fernando R., De Melo Órfão José J., Figueiredo José Luís

Απλή Εγγραφή

URIhttp://purl.tuc.gr/dl/dias/02206163-9B2E-4B96-A596-32A81795258D-
Αναγνωριστικόhttps://www.sciencedirect.com/science/article/pii/S0021979717301686?via%3Dihub-
Αναγνωριστικόhttps://doi.org/10.1016/j.jcis.2017.02.014-
Γλώσσαen-
Μέγεθος9 pagesen
ΤίτλοςEffect of cobalt loading on the solid state properties and ethyl acetate oxidation performance of cobalt-cerium mixed oxidesen
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
ΔημιουργόςCarabineiro, Sónia Alexandra Correiaen
ΔημιουργόςMarnellos, Geōrgios Een
ΔημιουργόςAsad Muhammad Faizanen
ΔημιουργόςSoares Olívia Salomé Gonçalves Pintoen
ΔημιουργόςPereira Manuel Fernando R.en
ΔημιουργόςDe Melo Órfão José J.en
ΔημιουργόςFigueiredo José Luísen
ΕκδότηςElsevieren
ΠερίληψηCobalt-cerium mixed oxides were prepared by the wet impregnation method and evaluated for volatile organic compounds (VOCs) abatement, using ethyl acetate (EtAc) as model molecule. The impact of Co content on the physicochemical characteristics of catalysts and EtAc conversion was investigated. The materials were characterized by various techniques, including N2 adsorption at −196 °C, scanning electron microscopy (SEM), X-ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS) to reveal the structure–activity relationship. The obtained results showed the superiority of mixed oxides compared to bare CeO2 and Co3O4, demonstrating a synergistic effect. The optimum oxidation performance was achieved with the sample containing 20 wt.% Co (Co/Ce atomic ratio of ca. 0.75), in which complete conversion of EtAc was attained at 260 °C. In contrast, temperatures above 300 °C were required to achieve 100% conversion over the single oxides. Notably, a strong relationship between both the: (i) relative population, and (ii) facile reduction of lattice oxygen with the ethyl acetate oxidation activity was found, highlighting the key role of loosely bound oxygen species on VOCs oxidation. A synergistic Co-Ce interaction can be accounted for the enhanced reducibility of mixed oxides, linked with the increased mobility of lattice oxygen.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2018-05-10-
Ημερομηνία Δημοσίευσης2017-
Θεματική ΚατηγορίαCeO2en
Θεματική ΚατηγορίαCo3O4en
Θεματική ΚατηγορίαCobalt (Co)-based catalystsen
Θεματική ΚατηγορίαEthyl acetate oxidationen
Θεματική ΚατηγορίαVolatile organic compounds (VOCs)en
Βιβλιογραφική ΑναφοράM. Konsolakis, S.A.C. Carabineiro, G. E. Marnellos, M. F. Asad, O.S.G.P. Soares, M.F.R. Pereira, J.J.M.b Órfão and J.L. Figueiredo, "Effect of cobalt loading on the solid state properties and ethyl acetate oxidation performance of cobalt-cerium mixed oxides," J. Colloid Interf. Sci., vol. 496, pp. 141-149, Jun. 2017. doi: 10.1016/j.jcis.2017.02.014en

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