2005
DOI: 10.1007/s10562-005-7945-9
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Abstract: Isotopic species of dioxygen released during the decomposition of 15 N 2 18 O over Fe-ferrierite show that the zeolite oxygens participate in the reaction. While Fe-ferrierite alone does not exchange its oxygens with 18 O 2 below 400°C, this exchange is very rapid in the mixture of 18 O 2 +N 2 O. The amount of participating zeolite oxygen (ca. 1-6 per iron atom) is practically the same in the latter case as in the decomposition of 15 N 2 18 O. The time dependence of individual dioxygen isotope species released… Show more

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Cited by 20 publications
(7 citation statements)
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“…We found similar I.E over Fe-FER, but its extent at room temperature (RT) was lower than the total amount of deposited oxygen corresponding to the amount of decomposed nitrous oxide [4]. The intense I.E of 18 O of labeled nitrous oxide for the framework oxygens of Fe-FER at higher temperatures has already been reported [5]. The existence of several reaction steps was recognized in the N 2 O decomposition over Fe-zeolites at mild temperature, i.e., capture of oxygens from nitrous oxide (step 1), followed by slightly delayed formation of surface NO x species (step 2), and decomposition of N 2 O proceeding with the aid of these surface NO x species (step 3) [6].…”
Section: Introductionsupporting
confidence: 82%
“…We found similar I.E over Fe-FER, but its extent at room temperature (RT) was lower than the total amount of deposited oxygen corresponding to the amount of decomposed nitrous oxide [4]. The intense I.E of 18 O of labeled nitrous oxide for the framework oxygens of Fe-FER at higher temperatures has already been reported [5]. The existence of several reaction steps was recognized in the N 2 O decomposition over Fe-zeolites at mild temperature, i.e., capture of oxygens from nitrous oxide (step 1), followed by slightly delayed formation of surface NO x species (step 2), and decomposition of N 2 O proceeding with the aid of these surface NO x species (step 3) [6].…”
Section: Introductionsupporting
confidence: 82%
“…The isotope scrambling observed in O2 TPD therefore reflects the ability of the zeolite lattice to act as a reservoir of mobile O atoms. [144][145][146] This reservoir includes 18 O atoms derived from the [Cu2( 18 O2)] 2+ oxygen precursor, but from experiment the ratio of 16 O: 18 O in this O-atom reservoir is greater than 10:1. The ability of the zeolite lattice to accept exogenous atoms is therefore critical to the conversion of [Cu2(O2)] 2+ into [Cu2O] 2+ .…”
Section: -Reactivity Of [Cu2o] 2+mentioning
confidence: 99%
“…[18,20] One may thus consider that Fe 2 + -BEA looks like Fe + ; in this regard it is noteworthy that atomic Fe + cations are active in the gasphase reduction of N 2 O by CO at 294 K. [27] Carbon monoxide appears to be one of the most efficient reductants for a-O removal, and thus for N 2 O reduction at low temperature (473-573 K). [11,25,[28][29][30] The present work was motivated by these observations and addresses DFT calculations on N 2 O reduction by CO on a large Fe-BEA model cluster, with corrections for longrange interactions by using an MM embedding scheme.…”
Section: Introductionmentioning
confidence: 99%