Temperature Dependent Electrical Properties and Catalytic Activities ofLa2O3–CO2–H2OPhase System
2009 ◽
Vol 2009
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pp. 1-4
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Keyword(s):
We present a study of electrical properties and catalytic activities of materials belonging to the hydrated carbonated systemLa2O3–CO2–H2O. The polycrystalline hydroxycarbonate, dioxycarbonate, and oxide are prepared via a coprecipitation route followed by heat treatment. The electrical conduction of the phases obtained by thermal decomposition fromLaOHCO3,H2Ois analyzed by electrical impedance spectroscopy, from25°Cto950°C, under air. The catalytic properties ofLaOHCO3,La2O2CO3andLa2O3polycrystalline phases are studied by FTIR spectroscopy, in presence of gas mixtures CO-air andCH4-air, at temperatures ranging between100°Cto525°C. The three materials behave differently in presence of CO orCH4gases.
2008 ◽
pp. 359-367
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2012 ◽
Vol 2012
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pp. 1-11
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2021 ◽