URI | http://purl.tuc.gr/dl/dias/3A87F9E4-BA3C-4894-B68E-B102B404E550 | - |
Αναγνωριστικό | https://doi.org/10.1016/j.apcatb.2021.120401 | - |
Αναγνωριστικό | https://www.sciencedirect.com/science/article/pii/S0926337321005270 | - |
Γλώσσα | en | - |
Μέγεθος | 14 pages | en |
Τίτλος | Deciphering the role of Ni particle size and nickel-ceria interfacial perimeter in the low-temperature CO2 methanation reaction over remarkably active Ni/CeO2 nanorods | en |
Δημιουργός | Varvoutis Georgios | en |
Δημιουργός | Lykaki Maria | en |
Δημιουργός | Λυκακη Μαρια | el |
Δημιουργός | Stefa Sofia | en |
Δημιουργός | Στεφα Σοφια | el |
Δημιουργός | Binas Vassilios | en |
Δημιουργός | Marnellos, George, 19..- | en |
Δημιουργός | Konsolakis Michail | en |
Δημιουργός | Κονσολακης Μιχαηλ | el |
Εκδότης | Elsevier | en |
Περίληψη | The structure sensitivity of CO2 methanation was explored over nickel particles (10–25 nm) supported on CeO2 nanorods. An optimum Ni particle size of 20 nm was revealed, with the corresponding sample demonstrating remarkable activity, i.e., 187 μmol CH4 g−1 s−1 and 92 % CH4 yield at 275 °C, which is among the highest ever reported. Notably, the intrinsic activity on the basis of the exposed Ni sites or Ni-ceria perimeter is largely independent of the Ni size, showcasing that neither the exposed Ni sites nor the Ni-ceria interface can be employed as activity descriptors. A compromise between the length of the metal-support perimeter and the competitive presence of larger Ni particles is necessary for the optimum activity. On the grounds of a structure-sensitivity analysis, the superior activity of larger Ni particles could be attributed to the presence of under-coordinated step and kink sites, instead of largely inactive terrace sites. | 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 | 2022-08-26 | - |
Ημερομηνία Δημοσίευσης | 2021 | - |
Θεματική Κατηγορία | CO2 methanation | en |
Θεματική Κατηγορία | Ni catalysts | en |
Θεματική Κατηγορία | CeO2 nanorods | en |
Θεματική Κατηγορία | Particle size effect | en |
Θεματική Κατηγορία | Structure-sensitivity | en |
Βιβλιογραφική Αναφορά | G. Varvoutis, M. Lykaki, S. Stefa, V. Binas, G. E. Marnellos, and M. Konsolakis, “Deciphering the role of Ni particle size and nickel-ceria interfacial perimeter in the low-temperature CO2 methanation reaction over remarkably active Ni/CeO2 nanorods,” Appl. Catal., B, vol. 297, Nov. 2021, doi: 10.1016/j.apcatb.2021.120401. | en |