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Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/B9ABA9F0-1D12-4932-8591-0D8DDD97C51C | - |
| Identifier | https://doi.org/10.1016/j.jcou.2022.102057 | - |
| Identifier | https://www.sciencedirect.com/science/article/pii/S2212982022001767 | - |
| Language | en | - |
| Extent | 15 pages | en |
| Title | Support-induced modifications on the CO2 hydrogenation performance of Ni/CeO2: the effect of ZnO doping on CeO2 nanorods | en |
| Creator | Varvoutis Georgios | en |
| Creator | Karakoulia Stamatia A. | en |
| Creator | Lykaki Maria | en |
| Creator | Λυκακη Μαρια | el |
| Creator | Stefa Sofia | en |
| Creator | Στεφα Σοφια | el |
| Creator | Binas Vassilios | en |
| Creator | Marnellos, George, 19..- | en |
| Creator | Konsolakis Michail | en |
| Creator | Κονσολακης Μιχαηλ | el |
| Publisher | Elsevier | en |
| Description | This research has been co-financed by the European Union and Greek national funds through the Greece 2.0 National Recovery and Resilience Fund, under the call RESEARCH - CREATE - INNOVATE (project code: T2EDK-01378). | en |
| Content Summary | The production of either CO or CH4 via the hydrogenation of CO2 is amongst the most promising routes for CO2 utilization. However, kinetic barriers necessitate the use of a catalyst, with Ni/CeO2 being one of the most investigated systems. Nevertheless, surface chemistry fine-tuning via appropriate promotional routes can induce significant modifications on the solid-state properties of catalysts and in turn on their activity/selectivity. In the present work, we originally report on the outstanding selectivity alteration of Ni/CeO2 by ZnO doping. Specifically, Ni-based catalysts supported on ZnO, CeO2 nanorods or a mixed ZnO-CeO2 oxide were synthesized by a modified hydrothermal method and characterized by various physicochemical methods. Notable changes in the reaction pathway were demonstrated, as the presence of ZnO largely favored CO production at T < 450 oC for both Ni/ZnO and Ni/ZnO-CeO2, whereas Ni/CeO2 was completely selective to CH4. These findings were interpreted on the basis of ZnO-induced inhibitory effects on key activity/selectivity descriptors like the redox and basic properties, as well as on the adsorption affinity of CO species, which are considered as intermediate species for CO2 methanation. | 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 | 2024-01-15 | - |
| Date of Publication | 2022 | - |
| Subject | CO2 hydrogenation | en |
| Subject | Ni/CeO2 | en |
| Subject | ZnO promotion | en |
| Subject | Selectivity modification | en |
| Subject | Support effect | en |
| Bibliographic Citation | G. Varvoutis, S. A. Karakoulia, M. Lykaki, S. Stefa, V. Binas, G. E. Marnellos, and M. Konsolakis, “Support-induced modifications on the CO2 hydrogenation performance of Ni/CeO2: the effect of ZnO doping on CeO2 nanorods,” J. CO2 Util., vol. 61, July 2022, doi: 10.1016/j.jcou.2022.102057. | en |
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