N2O decomposition over ceria-promoted Ir/Al2O3 catalysts: The role of ceria

Eleni Pachatouridou,E. Papista,A. Delimitis,Michalis A. Vasiliades,Angelos M. Efstathiou,M.D. Amiridis,Oleg S. Alexeev, D. Bloom,G.E. Marnellos,M. Konsolakis,Eleni F. Iliopoulou

Applied Catalysis B: Environmental（2016）

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摘要

•deN2O activity on Ir/Al2O3 and Ir/CeO2 is suppressed by O2 as opposed to Ir/CeO2-Al2O3.•CeO2-Al2O3 provides different Ir particles surface structure than Al2O3 or CeO2.•Establishment of a certain Irδ+/Ιr0 ratio is considered crucial towards enhancement of deN2O activity.•Oxygen vacancies in the vicinity of Ir-ceria interface promote N2O decomposition in the presence of O2.

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关键词

N2O decomposition,Ir/Al2O3 catalysts,Ceria promotion,HAADF-STEM/EELS,CO-DRIFTS

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