EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE

The effect of low Ag substitution in LaFeO3 perovskite on the thermal stability and catalytic oxidation of toluene was studied. Perovskites of the type La1-xAg xFeO3 (xAg =0.0, 0.05, 0.10) were prepared by the amorphous citrate method; characterized by nitrogen adsorption, XRD, FTIR, SEM-EDAX, TPR a...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	RIOSECO,F, RADOVIC,L, GARCÍA,X, GORDON,A, PECCHI,G
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2010
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000100011
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0717-97072010000100011
record_format	dspace
spelling	oai:scielo:S0717-970720100001000112010-04-29EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITERIOSECO,FRADOVIC,LGARCÍA,XGORDON,APECCHI,GThe effect of low Ag substitution in LaFeO3 perovskite on the thermal stability and catalytic oxidation of toluene was studied. Perovskites of the type La1-xAg xFeO3 (xAg =0.0, 0.05, 0.10) were prepared by the amorphous citrate method; characterized by nitrogen adsorption, XRD, FTIR, SEM-EDAX, TPR and O2- TPD techniques; and tested for the catalytic combustion of toluene in a flow reactor under excess oxygen. In comparison with the pure perovskite LaFeO3, the partially substituted La1-xAg xFeO3 present a perovskite structure with well-defined crystalline phases and greater reduction ability (attributable to the redox pair Fe+3/Fe+4). Noticeable changes in the á and ß-oxygen contents upon silver substitution were detected. Larger content of á-oxygen in the pure LaFeO3 perovskite is associated with greater catalytic activity. Two important effects upon Ag substitution in a pure LaFeO3 perovskites were observed: i) a greater reduction ability, ii) higher occurrence of oxygen vacancies due to ß-oxygen desorption, which were not active in the studied reaction.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.55 n.1 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000100011en10.4067/S0717-97072010000100011
institution	Scielo Chile
collection	Scielo Chile
language	English
description	The effect of low Ag substitution in LaFeO3 perovskite on the thermal stability and catalytic oxidation of toluene was studied. Perovskites of the type La1-xAg xFeO3 (xAg =0.0, 0.05, 0.10) were prepared by the amorphous citrate method; characterized by nitrogen adsorption, XRD, FTIR, SEM-EDAX, TPR and O2- TPD techniques; and tested for the catalytic combustion of toluene in a flow reactor under excess oxygen. In comparison with the pure perovskite LaFeO3, the partially substituted La1-xAg xFeO3 present a perovskite structure with well-defined crystalline phases and greater reduction ability (attributable to the redox pair Fe+3/Fe+4). Noticeable changes in the á and ß-oxygen contents upon silver substitution were detected. Larger content of á-oxygen in the pure LaFeO3 perovskite is associated with greater catalytic activity. Two important effects upon Ag substitution in a pure LaFeO3 perovskites were observed: i) a greater reduction ability, ii) higher occurrence of oxygen vacancies due to ß-oxygen desorption, which were not active in the studied reaction.
author	RIOSECO,F RADOVIC,L GARCÍA,X GORDON,A PECCHI,G
spellingShingle	RIOSECO,F RADOVIC,L GARCÍA,X GORDON,A PECCHI,G EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE
author_facet	RIOSECO,F RADOVIC,L GARCÍA,X GORDON,A PECCHI,G
author_sort	RIOSECO,F
title	EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE
title_short	EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE
title_full	EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE
title_fullStr	EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE
title_full_unstemmed	EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE
title_sort	effect of ag addition on the thermal stability and catalytic properties of lafeo3 perovskite
publisher	Sociedad Chilena de Química
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000100011
work_keys_str_mv	AT riosecof effectofagadditiononthethermalstabilityandcatalyticpropertiesoflafeo3perovskite AT radovicl effectofagadditiononthethermalstabilityandcatalyticpropertiesoflafeo3perovskite AT garciax effectofagadditiononthethermalstabilityandcatalyticpropertiesoflafeo3perovskite AT gordona effectofagadditiononthethermalstabilityandcatalyticpropertiesoflafeo3perovskite AT pecchig effectofagadditiononthethermalstabilityandcatalyticpropertiesoflafeo3perovskite
_version_	1718445419590057984

EFFECT OF Ag ADDITION ON THE THERMAL STABILITY AND CATALYTIC PROPERTIES OF LaFeO3 PEROVSKITE

Ejemplares similares