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Support induced effects on the Ir nanoparticles activity, selectivity and stability performance under CO2 reforming of methane

Nikolaraki Ersi, Goula Grammatiki, Panagiotopoulou Paraskevi, Taylor Martin, Kousi Kalliopi, Kyriakou Georgios, Kondarides Dimitris I., Lambert Richard M., Gentekakis Ioannis

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URIhttp://purl.tuc.gr/dl/dias/D178ED84-50B2-4896-B955-7EF1B3A27752-
Αναγνωριστικόhttps://doi.org/10.3390/nano11112880-
Αναγνωριστικόhttps://www.mdpi.com/2079-4991/11/11/2880/htm-
Γλώσσαen-
Μέγεθος24 pagesen
ΤίτλοςSupport induced effects on the Ir nanoparticles activity, selectivity and stability performance under CO2 reforming of methaneen
ΔημιουργόςNikolaraki Ersien
ΔημιουργόςΝικολαρακη Ερσηel
ΔημιουργόςGoula Grammatikien
ΔημιουργόςPanagiotopoulou Paraskevien
ΔημιουργόςΠαναγιωτοπουλου Παρασκευηel
ΔημιουργόςTaylor Martinen
ΔημιουργόςKousi Kalliopien
ΔημιουργόςKyriakou Georgiosen
ΔημιουργόςKondarides Dimitris I.en
ΔημιουργόςLambert Richard M.en
ΔημιουργόςGentekakis Ioannisen
ΔημιουργόςΓεντεκακης Ιωαννηςel
ΕκδότηςMDPIen
ΠερίληψηThe production of syngas (H2 and CO)—a key building block for the manufacture of liquid energy carriers, ammonia and hydrogen—through the dry (CO2−) reforming of methane (DRM) continues to gain attention in heterogeneous catalysis, renewable energy technologies and sustainable economy. Here we report on the effects of the metal oxide support (γ-Al2O3, alumina-ceria-zirconia (ACZ) and ceria-zirconia (CZ)) on the low-temperature (ca. 500–750 ∘C) DRM activity, selectivity, resistance against carbon deposition and iridium nanoparticles sintering under oxidative thermal aging. A variety of characterization techniques were implemented to provide insight into the factors that determine iridium intrinsic DRM kinetics and stability, including metal-support interactions and physicochemical properties of materials. All Ir/γ-Al2O3, Ir/ACZ and Ir/CZ catalysts have stable DRM performance with time-on-stream, although supports with high oxygen storage capacity (ACZ and CZ) promoted CO2 conversion, yielding CO-enriched syngas. CZ-based supports endow Ir exceptional anti-sintering characteristics. The amount of carbon deposition was small in all catalysts, however decreasing as Ir/γ-Al2O3 > Ir/ACZ > Ir/CZ. The experimental findings are consistent with a bifunctional reaction mechanism involving participation of oxygen vacancies on the support’s surface in CO2 activation and carbon removal, and overall suggest that CZ-supported Ir nanoparticles are promising catalysts for low-temperature dry reforming of methane (LT-DRM). en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2022-09-22-
Ημερομηνία Δημοσίευσης2021-
Θεματική ΚατηγορίαGreenhouse gasesen
Θεματική ΚατηγορίαDry reforming of methaneen
Θεματική ΚατηγορίαCarbon dioxideen
Θεματική ΚατηγορίαAlumina-ceria-zirconia mixed oxidesen
Θεματική ΚατηγορίαIridium nanoparticlesen
Θεματική ΚατηγορίαCoking-resistant catalystsen
Θεματική ΚατηγορίαSintering-resistant catalystsen
Θεματική ΚατηγορίαSyngas productionen
Βιβλιογραφική ΑναφοράE. Nikolaraki, G. Goula, P. Panagiotopoulou, M. J. Taylor, K. Kousi, G. Kyriakou, D. I. Kondarides, R. M. Lambert, and I. V. Yentekakis, “Support induced effects on the Ir nanoparticles activity, selectivity and stability performance under CO2 reforming of methane,” Nanomaterials, vol. 11, no. 11, Oct. 2021, doi: 10.3390/nano11112880.en

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