Temperature Dependent Electrical Properties and Catalytic Activities of La2O3-CO2-H2O Phase System

被引：6

作者：

Bakiz, Bahcine ^{[1
]}

Guinneton, Frederic ^{[1
]}

Arab, Madjid ^{[1
]}

Villain, Sylvie ^{[1
]}

Benlhachemi, Abdeljalil ^{[2
]}

Gavarri, Jean Raymond ^{[1
]}

机构：

[1] Univ Sud Toulon Var, UMR CNRS 6242, Inst Mat Microelect & Nanosci Provence, IM2NP, F-83957 La Garde, France

[2] Univ Ibn Zohr, Fac Sci, Lab Mat & Environm, Agadir 80000, Morocco

来源：

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2009年 / 2009卷

关键词：

D O I：

10.1155/2009/612130

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees C to 950 degrees 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 degrees C to 525 degrees C. The three materials behave differently in presence of CO or CH4 gases. Copyright (C) 2009 Bahcine Bakiz et al.

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页数：4

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