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- W2952959303 abstract "The pretreatment conditions (temperature, medium) have a strong influence on the N2O decomposition activity of Fe−ZSM-5 catalysts (J. Jia et al., J. Catal. 2002, 210, 453). We used X-ray absorption spectroscopy to follow in situ the structural changes of the iron oxide clusters in an Fe−ZSM-5 sample, which was prepared by chemical vapor deposition of FeCl3, during different pretreatments and during N2O decomposition. Reductive pretreatment in H2 always decreased the Fe−Fe coordination number; i.e., it broke the iron oxide clusters into smaller units by removing bridging oxygen atoms. When reduction was carried out at low temperatures (673 K), this process was reversed during reoxidation by N2O. When reduction was carried out at high temperatures (873 K), the smaller fragments were stabilized by forming strong bonds to the zeolite matrix and did not agglomerate during reoxidation. An analysis of the Fe−O coordination numbers showed that temperatures above 673 K are required to dehydroxylate the iron oxide ..." @default.
- W2952959303 created "2019-06-27" @default.
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- W2952959303 date "2004-08-14" @default.
- W2952959303 modified "2023-10-16" @default.
- W2952959303 title "An in Situ X-ray Absorption Spectroscopy Study of N<sub>2</sub>O Decomposition over Fe-ZSM-5 Prepared by Chemical Vapor Deposition of FeCl<sub>3</sub>" @default.
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- W2952959303 doi "https://doi.org/10.1021/jp048346+" @default.
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