Simultaneous thermogravimetry - Mass spectrometry for a solid oxide fuel cell cathode: (La0.7Sr0.3)0.9MnO3

H. Yokokawa; N. Sakai; T. Horita; M. Dokiya; T. Kawada; Y. Takai; M. Todoki

doi:10.1007/BF02376020

Simultaneous thermogravimetry - Mass spectrometry for a solid oxide fuel cell cathode: (La_0.7Sr_0.3)_0.9MnO₃

H. Yokokawa, N. Sakai, T. Horita, M. Dokiya, T. Kawada, Y. Takai, M. Todoki

ENV - Environmental Studies for Advanced Society

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A SOFC cathode related perovskite material, (La_0.7Sr _0.3)_0.9MnO₃, has been investigated by simultaneous thermogravimetry - mass spectrometry from room temperature to 1770 K. Water, carbon dioxide and oxygen were detected by mass spectrometry. Water and carbon dioxide evolution can be interpreted by assuming that prior to the thermogravimetry-mass spectrometry measurement about 0.5 % of the lanthanum component had reacted with carbon dioxide and water to form La ₂(CO₃)₃^*8H₂O, which dehydrated and decomposed via La₂O₂CO₃ into La₂O₃ and evolving H₂O and CO₂ during the present experiment. The observation that the lanthanum strontium manganite emitted oxygen in two stages can be ascribed to the two different oxygen sites in the perovskite lattice, that is, the oxygen excess and deficient regions.

Original language	English
Pages (from-to)	190-195
Number of pages	6
Journal	Ionics
Volume	2
Issue number	3-4
DOIs	https://doi.org/10.1007/BF02376020
Publication status	Published - 1996 May

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title = "Simultaneous thermogravimetry - Mass spectrometry for a solid oxide fuel cell cathode: (La0.7Sr0.3)0.9MnO3",

abstract = "A SOFC cathode related perovskite material, (La0.7Sr 0.3)0.9MnO3, has been investigated by simultaneous thermogravimetry - mass spectrometry from room temperature to 1770 K. Water, carbon dioxide and oxygen were detected by mass spectrometry. Water and carbon dioxide evolution can be interpreted by assuming that prior to the thermogravimetry-mass spectrometry measurement about 0.5 % of the lanthanum component had reacted with carbon dioxide and water to form La 2(CO3)3*8H2O, which dehydrated and decomposed via La2O2CO3 into La2O3 and evolving H2O and CO2 during the present experiment. The observation that the lanthanum strontium manganite emitted oxygen in two stages can be ascribed to the two different oxygen sites in the perovskite lattice, that is, the oxygen excess and deficient regions.",

author = "H. Yokokawa and N. Sakai and T. Horita and M. Dokiya and T. Kawada and Y. Takai and M. Todoki",

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T2 - (La0.7Sr0.3)0.9MnO3

AU - Yokokawa, H.

AU - Sakai, N.

AU - Horita, T.

AU - Dokiya, M.

AU - Kawada, T.

AU - Takai, Y.

AU - Todoki, M.

PY - 1996/5

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N2 - A SOFC cathode related perovskite material, (La0.7Sr 0.3)0.9MnO3, has been investigated by simultaneous thermogravimetry - mass spectrometry from room temperature to 1770 K. Water, carbon dioxide and oxygen were detected by mass spectrometry. Water and carbon dioxide evolution can be interpreted by assuming that prior to the thermogravimetry-mass spectrometry measurement about 0.5 % of the lanthanum component had reacted with carbon dioxide and water to form La 2(CO3)3*8H2O, which dehydrated and decomposed via La2O2CO3 into La2O3 and evolving H2O and CO2 during the present experiment. The observation that the lanthanum strontium manganite emitted oxygen in two stages can be ascribed to the two different oxygen sites in the perovskite lattice, that is, the oxygen excess and deficient regions.

AB - A SOFC cathode related perovskite material, (La0.7Sr 0.3)0.9MnO3, has been investigated by simultaneous thermogravimetry - mass spectrometry from room temperature to 1770 K. Water, carbon dioxide and oxygen were detected by mass spectrometry. Water and carbon dioxide evolution can be interpreted by assuming that prior to the thermogravimetry-mass spectrometry measurement about 0.5 % of the lanthanum component had reacted with carbon dioxide and water to form La 2(CO3)3*8H2O, which dehydrated and decomposed via La2O2CO3 into La2O3 and evolving H2O and CO2 during the present experiment. The observation that the lanthanum strontium manganite emitted oxygen in two stages can be ascribed to the two different oxygen sites in the perovskite lattice, that is, the oxygen excess and deficient regions.

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Simultaneous thermogravimetry - Mass spectrometry for a solid oxide fuel cell cathode: (La_0.7Sr_0.3)_0.9MnO₃

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