title: Theoretical study of N2O reduction by CO in Fe-BEA Zeolite.
abstract: Quantum mechanical (QM) and QM/molecular mechanics (MM) studies of the full catalytic cycle of N(2)O reduction by CO in Fe-BEA zeolite, that is, oxidation of BEA-Fe by N(2)O and reduction of BEA-Fe-alphaO by CO, is presented. A large QM cluster, representing half of the channel of the BEA zeolite, is used. The contribution of the MM embedding to the calculated activation energies is found to be negligible. The minimum-energy paths for N(2)O decomposition and reduction with CO are calculated using the nudged elastic band (NEB) method. Calculated and experimental activation energies are in good agreement. The two possible orientations for the gaseous molecules adsorbing on the Fe site that are found lead to different activation energies.
authors.affiliation: UMR 5618 CNRS, Ecole de Chimie, UM1, 8 rue de l'Ecole Normale, 34296 Montpellier Cédex 5, France.
authors.forename: Gerd
authors.initials: G
authors.lastname: Fischer
authors.forename: Annick
authors.initials: A
authors.lastname: Goursot
authors.forename: Bernard
authors.initials: B
authors.lastname: Coq
authors.forename: Gérard
authors.initials: G
authors.lastname: Delahay
authors.forename: Sourav
authors.initials: S
authors.lastname: Pal