About: Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite

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About: Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Direct evidence for the formation of surface Fe–NOx species over iron ferrierites during decomposition of N2O was found with a combination of temperature-programmed desorption of adsorbed surface species and infrared and Mössbauer spectroscopies. Surface NOx species were produced via the conversion of a transiently formed Fe(III)–O by exposing iron ferrierites (Si/Al = 8.7, Fe/Al = 0.07–0.1) to N2O. The transformation of Fe(III)–O into Fe–NOx was time- and temperature- dependent. Below 280 °C, predominantly Fe(III)–O species were formed; these species are known to be highly active in oxidations at low temperatures. A transformation of Fe(III)–O into Fe–NOx species occurred when the reaction temperature was increased or when the reaction time was increased at low temperatures. This resulted in the disappearance of the oxidation activity of iron ferrierite. In contrast, the formation of Fe–NOx species enhanced the rate of N2O decomposition. Once formed, NOx species were stable during the subsequent N2O decomposition. Direct evidence for the formation of surface Fe–NOx species over iron ferrierites during decomposition of N2O was found with a combination of temperature-programmed desorption of adsorbed surface species and infrared and Mössbauer spectroscopies. Surface NOx species were produced via the conversion of a transiently formed Fe(III)–O by exposing iron ferrierites (Si/Al = 8.7, Fe/Al = 0.07–0.1) to N2O. The transformation of Fe(III)–O into Fe–NOx was time- and temperature- dependent. Below 280 °C, predominantly Fe(III)–O species were formed; these species are known to be highly active in oxidations at low temperatures. A transformation of Fe(III)–O into Fe–NOx species occurred when the reaction temperature was increased or when the reaction time was increased at low temperatures. This resulted in the disappearance of the oxidation activity of iron ferrierite. In contrast, the formation of Fe–NOx species enhanced the rate of N2O decomposition. Once formed, NOx species were stable during the subsequent N2O decomposition. (en)
Title	Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite (en)
skos:prefLabel	Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite (en)
skos:notation	RIV/61388955:_____/12:00376640!RIV13-GA0-61388955
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/09/1627), P(GAP106/11/0624), P(KAN100400702), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	MAY 2012
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Sobalík, Zdeněk Nováková, Jana Sathu, Naveen Kumar Tabor, Edyta
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	165964
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/12:00376640
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	N2O decomposition; iron ferrierite; active oxygen (en)
http://linked.open.../riv/klicoveSlovo	N2O decomposition active oxygen iron ferrierite
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[1F196CE40826]
http://linked.open...i/riv/nazevZdroje	Journal of Catalysis
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Study of the dynamics of active sites of crystalline nanoporous alumosilicates employing molecular modeling Nanostructured materials for catalytic, electrocatalytic and sorption applications New category of zeolites with pentasil ring structure: Catalytic processes on zeolites with controlled distribution of aluminum atoms in the framework
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	289
http://linked.open...iv/tvurceVysledku	Nováková, Jana Sathu, Naveen Kumar Sobalík, Zdeněk Tabor, Edyta Závěta, K.
http://linked.open...ain/vavai/riv/wos	000303788800017
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	0021-9517
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jcat.2012.02.007

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