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We present a study of electrical properties and catalytic activities of materials belonging to the hydrated carbonated system La2O3–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 from LaOHCO3, H2O is analyzed by electrical impedance spectroscopy, from 25°C to 950°C, under air. The catalytic properties of LaOHCO3, La2O2CO3 and La2O3 polycrystalline phases are studied by FTIR spectroscopy, in presence of gas mixtures CO-air and CH4-air, at temperatures ranging between 100°C to 525°C. The three materials behave differently in presence of CO or CH4 gases

advances in materials science and engineering

Temperature Dependent Electrical Properties and Catalytic Activities of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mtext>La</mml:mtext></mml:mrow><mml:mtext>2</mml:mtext></mml:msub><mml:msub><mml:mtext>O</mml:mtext><mml:mtext>3</mml:mtext></mml:msub><mml:mtext>–</mml:mtext><mml:msub><mml:mrow><mml:mtext>CO</mml:mtext></mml:mrow><mml:mtext>2</mml:mtext></mml:msub><mml:mtext>–</mml:mtext><mml:msub><mml:mtext>H</mml:mtext><mml:mtext>2</mml:mtext></…

Temperature Dependent Electrical Properties and Catalytic Activities ofLa2O3–CO2–H2