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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/7D3A4A52-8218-4A6A-9597-3BF8DF6E47CF | - |
| Identifier | https://www.mdpi.com/1420-3049/21/5/644 | - |
| Identifier | https://doi.org/10.3390/molecules21050644 | - |
| Language | en | - |
| Extent | 20 pages | en |
| Title | Ethyl acetate abatement on copper catalysts supported on ceria doped with rare earth oxides | en |
| Creator | Carabineiro, Sónia Alexandra Correia | en |
| Creator | Konsolakis Michail | en |
| Creator | Κονσολακης Μιχαηλ | el |
| Creator | Marnellos, Georges E | en |
| Creator | Asad Muhammad Faizan | en |
| Creator | Soares Olívia Salomé Gonçalves Pinto | en |
| Creator | Tavares Pedro Bandeira | en |
| Creator | Pereira Manuel Fernando R. | en |
| Creator | Orfão, José Joaquim de Melo | en |
| Creator | Figueiredo José Luís | en |
| Publisher | MDPI | en |
| Content Summary | Different lanthanide (Ln)-doped cerium oxides (Ce0.5 Ln0.5 O1.75, where Ln: Gd, La, Pr, Nd, Sm) were loaded with Cu (20 wt. %) and used as catalysts for the oxidation of ethyl acetate (EtOAc), a common volatile organic compound (VOC). For comparison, both Cu-free (Ce-Ln) and supported Cu (Cu/Ce-Ln) samples were characterized by N2 adsorption at -196°C, scanning/transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and temperature programmed reduction in H2. The following activity sequence, in terms of EtOAc conversion, was found for bare supports: CeO2 ≈ Ce0.5Pr0.5O1.75 > Ce0.5Sm0.5O1.75 > Ce0.5Gd0.5O1.75 > Ce0.5Nd0.5O1.75 > Ce0.5La0.5O1.75. Cu addition improved the catalytic performance, without affecting the activity order. The best catalytic performance was obtained for Cu/CeO2 and Cu/Ce0.5Pr0.5O1.75 samples, both achieving complete EtOAc conversion below ca. 290°C. A strong correlation was revealed between the catalytic performance and the redox properties of the samples, in terms of reducibility and lattice oxygen availability. No particular correlation between the VOC oxidation performance and textural characteristics was found. The obtained results can be explained in terms of a Mars-van Krevelen type redox mechanism involving the participation of weakly bound (easily reduced) lattice oxygen and its consequent replenishment by gas phase oxygen. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2018-10-16 | - |
| Date of Publication | 2016 | - |
| Subject | Copper (Cu)-based catalysts | en |
| Subject | Ethyl acetate oxidation | en |
| Subject | Mixed oxides | en |
| Subject | Rare earth oxides | en |
| Subject | Volatile organic compounds (VOCs) | en |
| Bibliographic Citation | S. A. C. Carabineiro, M. Konsolakis, G. E.-N. Marnellos, M. F. Asad, O. S. G. P. Soares, P. B. Tavares, M. F. R. Pereira, J. J. De Melo Órfão and J. L. Figueiredo, "Ethyl acetate abatement on copper catalysts supported on ceria doped with rare earth oxides," Molecules, vol. 21, no. 5, May 2016. doi: 10.3390/molecules21050644 | en |
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