An investigation of the role of Zr and La dopants into Ce1-x-yZrxLayO delta enriched gamma-Al2O3 TWC washcoats

Papavasiliou, A; Tsetsekou, A; Matsouka, V; Konsolakis, M; Yentekakis, IV

dc.contributor.author	Papavasiliou, A	en
dc.contributor.author	Tsetsekou, A	en
dc.contributor.author	Matsouka, V	en
dc.contributor.author	Konsolakis, M	en
dc.contributor.author	Yentekakis, IV	en
dc.date.accessioned	2014-03-01T02:00:01Z
dc.date.available	2014-03-01T02:00:01Z
dc.date.issued	2010	en
dc.identifier.issn	0926-860X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29073
dc.subject	TWCs	en
dc.subject	Alumina	en
dc.subject	Ceria	en
dc.subject	Thermal stability	en
dc.subject	Simulated exhaust conditions	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	OXYGEN STORAGE CAPACITY	en
dc.subject.other	CEO2-ZRO2 MIXED OXIDES	en
dc.subject.other	CERIA-ZIRCONIA	en
dc.subject.other	SOLID-SOLUTIONS	en
dc.subject.other	THERMAL-STABILITY	en
dc.subject.other	REDOX BEHAVIOR	en
dc.subject.other	STRUCTURAL-PROPERTIES	en
dc.subject.other	PARTIAL OXIDATION	en
dc.subject.other	RARE-EARTH	en
dc.subject.other	PT/CEZRO2/AL2O3 CATALYSTS	en
dc.title	An investigation of the role of Zr and La dopants into Ce1-x-yZrxLayO delta enriched gamma-Al2O3 TWC washcoats	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	This work involves the synthesis of composite three-way catalytic (TWC) washcoats consisting of 80 wt% of gamma-alumina as the main supporting material, promoted with 20 wt% of ceria based solid solution. Pt in low loading (0.5 wt%) was employed as the only active phase. Washcoats varying in the solid solution composition (CexZryLazO delta), prepared by coprecipitation, are comparatively investigated in an attempt to elucidate the effect of Ce, Zr and La oxide promoters on the catalytic activity and thermal durability. For this purpose, catalytic activity measurements as well as detailed structural and morphological evaluations (differential thermal analysis (DTA), X-ray diffraction (XRD), N-2 adsorption, oxygen storage capacity and DRIFTS analyses) were carried out before and after thermal aging in oxidative atmosphere. The catalytic performance was studied in loaded cordierite monoliths (TWCs form) under simulated exhaust conditions at the stoichiometric point. Doping ceria with Zr and La cation proved beneficial for both catalytic performance and thermal durability of the washcoat, with Ce0.4Zr0.5La0.1O1.9/gamma-Al2O3/Pt sample presenting the optimum properties. The catalytic behavior is discussed based on oxygen storage capacity, noble metal dispersion and textural characteristics of the examined samples. (C) 2010 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	APPLIED CATALYSIS A-GENERAL	en
dc.identifier.isi	ISI:000279447600010	en
dc.identifier.volume	382	en
dc.identifier.issue	1	en
dc.identifier.spage	73	en
dc.identifier.epage	84	en