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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

Varvoutis Georgios, Lykaki Maria, Stefa Sofia, Binas Vassilios, Marnellos, George, 19..-, Konsolakis Michail

Απλή Εγγραφή

URIhttp://purl.tuc.gr/dl/dias/3A87F9E4-BA3C-4894-B68E-B102B404E550-
Αναγνωριστικόhttps://doi.org/10.1016/j.apcatb.2021.120401-
Αναγνωριστικόhttps://www.sciencedirect.com/science/article/pii/S0926337321005270-
Γλώσσαen-
Μέγεθος14 pagesen
ΤίτλοςDeciphering the role of Ni particle size and nickel-ceria interfacial perimeter in the low-temperature CO2 methanation reaction over remarkably active Ni/CeO2 nanorodsen
ΔημιουργόςVarvoutis Georgiosen
ΔημιουργόςLykaki Mariaen
ΔημιουργόςΛυκακη Μαριαel
ΔημιουργόςStefa Sofiaen
ΔημιουργόςΣτεφα Σοφιαel
ΔημιουργόςBinas Vassiliosen
ΔημιουργόςMarnellos, George, 19..-en
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
ΕκδότηςElsevieren
ΠερίληψηThe 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
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2022-08-26-
Ημερομηνία Δημοσίευσης2021-
Θεματική ΚατηγορίαCO2 methanationen
Θεματική ΚατηγορίαNi catalystsen
Θεματική ΚατηγορίαCeO2 nanorodsen
Θεματική ΚατηγορίαParticle size effecten
Θεματική ΚατηγορίαStructure-sensitivityen
Βιβλιογραφική ΑναφοράG. 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

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