An investigation of the role of Zr and La dopants into Ce1-x-yZrxLayOδ enriched γ-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	2014-03-01T01:32:44Z
dc.date.available	2014-03-01T01:32:44Z
dc.date.issued	2010	en
dc.identifier.issn	0926860X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20210
dc.subject	Alumina	en
dc.subject	Ceria	en
dc.subject	Simulated exhaust conditions	en
dc.subject	Thermal stability	en
dc.subject	TWCs	en
dc.subject.other	Before and after	en
dc.subject.other	Catalytic activity	en
dc.subject.other	Catalytic behavior	en
dc.subject.other	Catalytic performance	en
dc.subject.other	Cordierite monolith	en
dc.subject.other	La dopant	en
dc.subject.other	Low loading	en
dc.subject.other	Noble metals	en
dc.subject.other	Optimum properties	en
dc.subject.other	Oxidative atmosphere	en
dc.subject.other	Oxygen storage capacity	en
dc.subject.other	Simulated exhaust conditions	en
dc.subject.other	Solid solution composition	en
dc.subject.other	Supporting material	en
dc.subject.other	Textural characteristic	en
dc.subject.other	Thermal durability	en
dc.subject.other	Thermal stability	en
dc.subject.other	Washcoats	en
dc.subject.other	Catalyst activity	en
dc.subject.other	Cerium	en
dc.subject.other	Crystallization	en
dc.subject.other	Differential thermal analysis	en
dc.subject.other	Doping (additives)	en
dc.subject.other	Durability	en
dc.subject.other	Electrochemical sensors	en
dc.subject.other	Gas adsorption	en
dc.subject.other	Oxygen	en
dc.subject.other	Platinum	en
dc.subject.other	Precious metals	en
dc.subject.other	Silicate minerals	en
dc.subject.other	Solid solutions	en
dc.subject.other	Solidification	en
dc.subject.other	Thermal aging	en
dc.subject.other	Thermodynamic stability	en
dc.subject.other	X ray diffraction	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Zirconium	en
dc.subject.other	Cerium compounds	en
dc.title	An investigation of the role of Zr and La dopants into Ce1-x-yZrxLayOδ enriched γ-Al2O3 TWC washcoats	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.apcata.2010.04.025	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.apcata.2010.04.025	en
heal.publicationDate	2010	en
heal.abstract	This work involves the synthesis of composite three-way catalytic (TWC) washcoats consisting of 80 wt% of γ-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 (CexZryLazOδ), 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), N2 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/γ-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. © 2010 Elsevier B.V. All rights reserved.	en
heal.journalName	Applied Catalysis A: General	en
dc.identifier.doi	10.1016/j.apcata.2010.04.025	en
dc.identifier.volume	382	en
dc.identifier.issue	1	en
dc.identifier.spage	73	en
dc.identifier.epage	84	en