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Moessbauer Study of Iron-containing Zeolites

DOI: 10.1039/f19848000709

Source and publish data:

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 709 - 720 (1984)

Update date:2022-08-10

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Authors:

Petrera, MichelePetrera, Michele

Gennaro, AntonioGennaro, Antonio

Gherardi, PaolaGherardi, Paola

Gubitosa, GiuseppeGubitosa, Giuseppe

Pernicone, NicolaPernicone, Nicola

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Article abstract of DOI:10.1039/f19848000709

Metal-loaded zeolites combine the advantages of shape selectivity and high metal dispersion and have therefore been investigated from the point of view of their catalytic performance, especially for hydrogenation and Fischer-Tropsch synthesis.In the case of iron, Moessbauer spectroscopy offers a valuable means for the characterization of the electronic and chemical structure arising from the interaction between a metal ion and a solid electrolyte and also allows a quantitative determination of exchange-site population.In this paper comparative Moesbauer studies of 57Fe on various zeolites starting from different precursors are presented with the aim of selectively controlling the location of the metal ion or complex in the exchange sites.Complex ions of the type 2+ with L=1,10-phenanthroline or 2,2'-dipyridyl have been exchanged in X- and Y-zeolites and the evolution with thermal treatment under vacuum of the exchange-site population has been investigated.An attempt has also been made to define better the exchange sites for Fe2+ in the particular structure of zeolite ZSM-5.

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