Interaction of NO and NO2 with the surface of CexZr1−xO2 solid solutions – Influence of the phase composition期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Interaction of NO and NO₂ with the surface of Ce_xZr_1−xO₂ solid solutions – Influence of the phase composition

Authors:	Andrzej Adamski Edyta Tabor Barbara Gil Zbigniew Sojka

Affiliation:	^aJagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Cracow, Poland ^bPAS, Institute of Catalysis and Surface Chemistry, Niezapominajek 8, 30-239 Cracow, Poland ^cRegional Laboratory of Physicochemical Analyses and Structural Research, Ingardena 3, 30-060 Cracow, Poland

Abstract:	Structural (XRD) and spectroscopic (EPR, IR and Raman) investigations were performed to elucidate the influence of CeO₂ content on the phase composition and surface chemistry of Ce_xZr_1?xO₂ solid solutions (x = 0.10–0.85), interacting with NO and NO₂ in the absence and presence of oxygen. Strong influence of ceria loading on the adsorption modes of both nitrogen oxides and the nature of the resultant surface species was revealed. Adsorption of NO led to formation of mononitrosyl complexes, dimers and N₂O, whereas interaction of NO₂ with the ceria–zirconia catalyst resulted in the adsorbate disproportionation or coupling, depending on the sample composition.

Keywords:	Ce_xZr_1?xO₂ Phase composition NO_x adsorption EPR RS
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