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Mössbauer spectroscopy in heterogeneous catalysis: A brief overview and recent study on paramagnetic features detected in catalytic centres of Fe-ZSM-5

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Abstract

A short retrospection is given on the development of Mössbauer spectroscopy and on the early period of its application to heterogeneous catalysis in Hungary. Besides the historical view, we present results of recent studies of a latest application on a nanosystem. Namely, catalytic centres in Fe-ZSM-5 are studied by in situ spectroscopy, the results are correlated with parallel activity measurements in the decomposition of N2O. Changes in paramagnetic relaxation features are interpreted as the effects of Fe2+/Fe3+ interconversions. From the analysis, the dominance of the mononuclear species is suggested at lower temperature (620 K). The dinuclear Fe(3+) framework-O-Fe(2+) extra-framework species play probably more expressed role at higher temperatures (∼ 770 K) in the decompositon of nitrous oxide.

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Authors and Affiliations

  1. Institute of Isotopes, HAS, Budapest, P.O.B. 77, H-1525, Hungary

    László Guczi & Károly Lázár

  2. Institute of Nanochemistry and Catalysis, Chemical Research Center, P. O. Box 17, H-1525, Budapest, Hungary

    László Guczi

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  1. László Guczi
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  2. Károly Lázár
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Correspondence to László Guczi.

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Guczi, L., Lázár, K. Mössbauer spectroscopy in heterogeneous catalysis: A brief overview and recent study on paramagnetic features detected in catalytic centres of Fe-ZSM-5. React Kinet Catal Lett 96, 335–343 (2009). https://doi.org/10.1007/s11144-009-5506-8

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  • DOI: https://doi.org/10.1007/s11144-009-5506-8

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