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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F12%3A00376640" target="_blank" >RIV/61388955:_____/12:00376640 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/12:10128823

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jcat.2012.02.007" target="_blank" >http://dx.doi.org/10.1016/j.jcat.2012.02.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcat.2012.02.007" target="_blank" >10.1016/j.jcat.2012.02.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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. SurfaceNOx 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

Název v anglickém jazyce

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

Popis výsledku anglicky

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. SurfaceNOx 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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Catalysis

ISSN

0021-9517

e-ISSN

—

Svazek periodika

289

Číslo periodika v rámci svazku

MAY 2012

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

164-170

Kód UT WoS článku

000303788800017

EID výsledku v databázi Scopus

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