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Hydrothermal synthesis of ZnO-doped ceria nanorods: effect of ZnO content on the redox properties and the CO oxidation performance

Stefa Sofia, Lykaki Maria, Binas Vassilios, Pandis Pavlos, Stathopoulos Vassilis, Konsolakis Michail

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URIhttp://purl.tuc.gr/dl/dias/8BC647E9-0142-4C0A-B9EC-306688494E6B-
Identifierhttps://doi.org/10.3390/app10217605-
Identifierhttps://www.mdpi.com/2076-3417/10/21/7605/htm-
Languageen-
Extent12 pagesen
Extent3,85 megabytesen
TitleHydrothermal synthesis of ZnO-doped ceria nanorods: effect of ZnO content on the redox properties and the CO oxidation performanceen
CreatorStefa Sofiaen
CreatorΣτεφα Σοφιαel
CreatorLykaki Mariaen
CreatorΛυκακη Μαριαel
CreatorBinas Vassiliosen
CreatorPandis Pavlosen
CreatorStathopoulos Vassilisen
CreatorKonsolakis Michailen
CreatorΚονσολακης Μιχαηλel
PublisherMDPIen
DescriptionThis research has been co-financed by the European Union and Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the calls RESEARCH—CREATE—INNOVATE (project code: T1EDK-00094)en
Content SummaryThe rational design of highly efficient, noble metal-free metal oxides is one of the main research priorities in the area of catalysis. To this end, the fine tuning of ceria-based mixed oxides by means of aliovalent metal doping has currently received particular attention due to the peculiar metal-ceria synergistic interactions. Herein, we report on the synthesis, characterization and catalytic evaluation of ZnO–doped ceria nanorods (NR). In particular, a series of bare CeO2 and ZnO oxides along with CeO2/ZnO mixed oxides of different Zn/Ce atomic ratios (0.2, 0.4, 0.6) were prepared by the hydrothermal method. All prepared samples were characterized by X-ray diffraction (XRD), N2 physisorption, temperature-programmed reduction (TPR), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) and transmission electron microscopy (TEM). The CO oxidation reaction was employed as a probe reaction to gain insight into structure-property relationships. The results clearly showed the superiority of mixed oxides as compared to bare ones, which could be ascribed to a synergistic ZnO–CeO2 interaction towards an improved reducibility and oxygen mobility. A close correlation between the catalytic activity and oxygen storage capacity (OSC) was disclosed. Comparison with relevant literature studies verifies the role of OSC as a key activity descriptor for reactions following a redox-type mechanism. en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2021-04-22-
Date of Publication2020-
SubjectCeO2/ZnO mixed oxidesen
SubjectZinc oxideen
SubjectCeria nanorodsen
SubjectOxygen storage capacityen
SubjectCO oxidationen
Bibliographic CitationS. Stefa, M. Lykaki, V. Binas, P. K. Pandis, V. N. Stathopoulos, and M. Konsolakis, “Hydrothermal synthesis of ZnO-doped ceria nanorods: effect of ZnO content on the redox properties and the CO oxidation performance,” Appl. Sci., vol. 10, no. 21, Nov. 2020. doi: 10.3390/app10217605en

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