Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
EN
|
EL
| URI | http://purl.tuc.gr/dl/dias/02206163-9B2E-4B96-A596-32A81795258D | - |
| Αναγνωριστικό | https://www.sciencedirect.com/science/article/pii/S0021979717301686?via%3Dihub | - |
| Αναγνωριστικό | https://doi.org/10.1016/j.jcis.2017.02.014 | - |
| Γλώσσα | en | - |
| Μέγεθος | 9 pages | en |
| Τίτλος | Effect of cobalt loading on the solid state properties and ethyl acetate oxidation performance of cobalt-cerium mixed oxides | en |
| Δημιουργός | Konsolakis Michail | en |
| Δημιουργός | Κονσολακης Μιχαηλ | el |
| Δημιουργός | Carabineiro, Sónia Alexandra Correia | en |
| Δημιουργός | Marnellos, Geōrgios E | en |
| Δημιουργός | Asad Muhammad Faizan | en |
| Δημιουργός | Soares Olívia Salomé Gonçalves Pinto | en |
| Δημιουργός | Pereira Manuel Fernando R. | en |
| Δημιουργός | De Melo Órfão José J. | en |
| Δημιουργός | Figueiredo José Luís | en |
| Εκδότης | Elsevier | en |
| Περίληψη | Cobalt-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 |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2018-05-10 | - |
| Ημερομηνία Δημοσίευσης | 2017 | - |
| Θεματική Κατηγορία | CeO2 | en |
| Θεματική Κατηγορία | Co3O4 | en |
| Θεματική Κατηγορία | Cobalt (Co)-based catalysts | en |
| Θεματική Κατηγορία | Ethyl acetate oxidation | en |
| Θεματική Κατηγορία | Volatile organic compounds (VOCs) | en |
| Βιβλιογραφική Αναφορά | M. 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.2017.02.014 | en |
Copyright © DIAS 2013
