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Article

Effect of the Preparation Method on the Physicochemical Properties and the CO Oxidation Performance of Nanostructured CeO2/TiO2 Oxides

1
Industrial, Energy and Environmental Systems Lab (IEESL), School of Production Engineering and Management, Technical University of Crete, GR-73100 Chania, Greece
2
Institute of Electronic Structure and Laser (IESL), FORTH, P.O. Box 1527, Vasilika Vouton, GR-71110 Heraklion, Greece
3
Laboratory of Chemistry and Materials Technology, General (Core) Department, National and Kapodistrian University of Athens, GR-34400 Psachna Campus, Greece
*
Authors to whom correspondence should be addressed.
Processes 2020, 8(7), 847; https://doi.org/10.3390/pr8070847
Received: 24 June 2020 / Revised: 10 July 2020 / Accepted: 14 July 2020 / Published: 16 July 2020
(This article belongs to the Special Issue Advances in Supported Nanoparticle Catalysts)
Ceria-based mixed oxides have been widely studied in catalysis due to their unique surface and redox properties, with implications in numerous energy- and environmental-related applications. In this regard, the rational design of ceria-based composites by means of advanced synthetic routes has gained particular attention. In the present work, ceria–titania composites were synthesized by four different methods (precipitation, hydrothermal in one and two steps, Stöber) and their effect on the physicochemical characteristics and the CO oxidation performance was investigated. A thorough characterization study, including N2 adsorption-desorption, X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS), transmission electron microscopy (TEM) and H2 temperature-programmed reduction (H2-TPR) was performed. Ceria–titania samples prepared by the Stöber method, exhibited the optimum CO oxidation performance, followed by samples prepared by the hydrothermal method in one step, whereas the precipitation method led to almost inactive oxides. CeO2/TiO2 samples synthesized by the Stöber method display a rod-like morphology of ceria nanoparticles with a uniform distribution of TiO2, leading to enhanced reducibility and oxygen storage capacity (OSC). A linear relationship was disclosed among the catalytic performance of the samples prepared by different methods and the abundance of reducible oxygen species. View Full-Text
Keywords: CeO2/TiO2 mixed oxides; Stöber method; ceria nanorods; CO oxidation CeO2/TiO2 mixed oxides; Stöber method; ceria nanorods; CO oxidation
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MDPI and ACS Style

Stefa, S.; Lykaki, M.; Fragkoulis, D.; Binas, V.; Pandis, P.K.; Stathopoulos, V.N.; Konsolakis, M. Effect of the Preparation Method on the Physicochemical Properties and the CO Oxidation Performance of Nanostructured CeO2/TiO2 Oxides. Processes 2020, 8, 847. https://doi.org/10.3390/pr8070847

AMA Style

Stefa S, Lykaki M, Fragkoulis D, Binas V, Pandis PK, Stathopoulos VN, Konsolakis M. Effect of the Preparation Method on the Physicochemical Properties and the CO Oxidation Performance of Nanostructured CeO2/TiO2 Oxides. Processes. 2020; 8(7):847. https://doi.org/10.3390/pr8070847

Chicago/Turabian Style

Stefa, Sofia, Maria Lykaki, Dimitrios Fragkoulis, Vasileios Binas, Pavlos K. Pandis, Vassilis N. Stathopoulos, and Michalis Konsolakis. 2020. "Effect of the Preparation Method on the Physicochemical Properties and the CO Oxidation Performance of Nanostructured CeO2/TiO2 Oxides" Processes 8, no. 7: 847. https://doi.org/10.3390/pr8070847

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