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Ir-Catalysed nitrous oxide (N2O) decomposition: effect of Ir particle size and metal–support interactions

Gentekakis Ioannis, Goula Grammatiki, Betsi-Argyropoulou Ioanna-Idyli, Panagiotopoulou Paraskevi, Taylor Martin J., Kyriakou Georgios, Lambert Richard M., Kabouri Stavroula

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URIhttp://purl.tuc.gr/dl/dias/2D2333A4-4211-408D-B16A-93F1A4FCEDBF-
Identifierhttps://doi.org/10.1007/s10562-017-2233-z-
Identifierhttps://link.springer.com/article/10.1007/s10562-017-2233-z-
Languageen-
Extent7 pagesen
TitleIr-Catalysed nitrous oxide (N2O) decomposition: effect of Ir particle size and metal–support interactionsen
CreatorGentekakis Ioannisen
CreatorΓεντεκακης Ιωαννηςel
CreatorGoula Grammatikien
CreatorΓουλα Γραμματικηel
CreatorBetsi-Argyropoulou Ioanna-Idylien
CreatorΜπετση-Αργυροπουλου Ιωαννα-Ηδυληel
CreatorPanagiotopoulou Paraskevien
CreatorΠαναγιωτοπουλου Παρασκευηel
CreatorTaylor Martin J.en
CreatorKyriakou Georgiosen
CreatorLambert Richard M.en
CreatorKabouri Stavroulaen
CreatorΚαμπουρη Σταυρουλαel
PublisherSpringer Nature [academic journals on nature.com]en
Content SummaryThe effect of the morphology of Ir particles supported on γ-Al2O3, 8 mol%Y2O3-stabilized ZrO2 (YSZ), 10 mol%Gd2O3-doped CeO2 (GDC) and 80 wt%Al2O3–10 wt%CeO2–10 wt%ZrO2 (ACZ) on their stability on oxidative conditions, the associated metal–support interactions and activity for catalytic decomposition of N2O has been studied. Supports with intermediate or high oxygen ion lability (GDC and ACZ) effectively stabilized Ir nanoparticles against sintering, in striking contrast to supports offering negligible or low oxygen ion lability (γ-Al2O3 and YSZ). Turnover frequency studies using size-controlled Ir particles showed strong structure sensitivity, de-N2O catalysis being favoured on large catalyst particles. Although metallic Ir showed some de-N2O activity, IrO2 was more active, possibly present as a superficial overlayer on the iridium particles under reaction conditions. Support-induced turnover rate modifications, resulted from an effective double layer [Oδ−–δ+](Ir) on the surface of iridium nanoparticles, via O2− backspillover from the support, were significant in the case of GDC and ACZ.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2019-11-14-
Date of Publication2018-
SubjectCeriaen
SubjectNanoparticles sinteringen
SubjectNitrous oxide decompositionen
SubjectOstwald ripeningen
SubjectOxygen storage capacityen
SubjectThermal agingen
Bibliographic CitationI.V. Yentekakis, G. Goula, S. Kampouri, I. Betsi-Argyropoulou, P. Panagiotopoulou, M.J. Taylor, G. Kyriakou and R.M. Lambert, "Ir-Catalysed nitrous oxide (N2O) decomposition: effect of Ir particle size and metal–support interactions," Catal. Lett., vol. 148, no. 1., pp. 341-347, Jan. 2018. doi: 10.1007/s10562-017-2233-zen

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