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The perovskite oxide, LaFeO3, was synthesized by different preparation methods, i.e., the calcination of co-precipitated precursors [La(Ag)­Fe­CO3 and La­Fe­CO3] and a mixture of La2O3 and Fe2O3 (La­Fe­O). By using the solution of Ag, the formation temperature (600°C) of the LaFeO3 single phase obtained by the calcining of La(Ag)­Fe­CO3 was about 500°C lower than that of La­Fe­CO3. The formation temperature of the LaFeO3 single phase of La­Fe­O was 1100°C as well as that of La­Fe­CO3. Their carbon oxidations were investigated by DSC (differential scanning calorimetry) measurements. The DSC exothermic peak of La0.9Ag0.1FeO¡ obtained by the calcining of La(Ag)­Fe­CO3 at 700°C occurred at 409°C and showed a higher carbon oxidation activity when compared to LaFeO3 (477 and 562°C) obtained by the calcining of La­Fe­CO3 and La­Fe­O at 1100°C. The carbon oxidation activation energies observed for the non-catalyzed and catalyzed reactions (mixture of La0.9Ag0.1FeO¡) were 160 and 130kJ·mol11, respectively. ©2013 The Ceramic Society of Japan. All rights reserved.

journal of the ceramic society of japan

Carbon oxidation activity of complex oxides (Part 2)—Characteristics of La&lt;sub&gt;0.9&lt;/sub&gt;Ag&lt;sub&gt;0.1&lt;/sub&gt;FeO&lt;sub&gt;α&lt;/sub&gt; synthesized at low temperature using co-precipitation method—