EMR characterisation of La1.8M0.2CuO4 and La0.9M0.1CoO3 (M = Pr, Sm, Tb) catalysts for methane flameless combustion

Oliva, C.; Cappelli, S.; Kryukov, A.; Chiarello, G.L.; Vishniakov, A.V.; Forni, L.

doi:10.1016/j.molcata.2005.11.056

A few perovskite-like and fluorite-like samples in which M=Pr, Sm or Tb substitutes for La have been characterised by electron magnetic resonance (EMR) spectroscopy and other techniques. Ferromagnetic (FM) systems form with the fresh biphasic sample with M =Sm only, but not after recalcination, when it becomes monophasic. These systems could be formed of Magnetic Bound Polarons due to the thermally excited J=1 Sm2+ ions present as impurity in the former case. FM systems form also with the M = Tb sample, but only after catalytic use. In this case FM systems could be composed of Tb4+ ions forming during sample re-oxidation. All these EMR observations have been correlated with the catalytic performance of these samples.

EMR characterisation of La1.8M0.2CuO4 and La0.9M0.1CoO3 (M = Pr, Sm, Tb) catalysts for methane flameless combustion / C. Oliva, S. Cappelli, A. Kryukov, G.L. Chiarello, A.V. Vishniakov, L. Forni. - In: JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL. - ISSN 1381-1169. - 247:1-2(2006), pp. 248-252.

Titolo:	EMR characterisation of La1.8M0.2CuO4 and La0.9M0.1CoO3 (M = Pr, Sm, Tb) catalysts for methane flameless combustion
Autori:	OLIVA, CESARE (Primo) CAPPELLI, SERENA (Secondo) A. Kryukov CHIARELLO, GIAN LUCA A. V. Vishniakov FORNI, LUCIO (Ultimo) mostra contributor esterni nascondi contributor esterni
Parole Chiave:	partially substituted perovskites ; partially substituted fluorites ; EPR ; ferromagnetic resonance ; magnetic bound polarons ; catalytic methane combustion
Settore Scientifico Disciplinare:	Settore CHIM/02 - Chimica Fisica
Data di pubblicazione:	2006
Rivista:	JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL
Tipologia:	Article (author)
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.molcata.2005.11.056
Appare nelle tipologie:	01 - Articolo su periodico

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