LaxCe1-xCoyCu1-yO3-α Perovskite촉매의 선택적 CO 산화반응에 관한 연구 = Study on the Selective CO OxidationUsing LaxCe1-xCoyCu1-yO3-α Perovskite Catalysts

다국어 초록 (Multilingual Abstract)

CO oxidation and selective CO oxidation of LaxCe1-xCoyCu1-yO3- perovskite(x=1, 0.9, 0.7. 0.5; y=1, 0.9, 0.7, 0.5) were investigated. For CO oxidation, catalytic activities were studied according to different preparation conditions such as pH and calcination temperature. The influence of the change of the O2 concentration for selective CO oxidation was studied, too. The substitution of Ce for La improved the catalytic activity for CO oxidation and selective CO oxidation and best activity was observed for La0.7Ce0.3CoO3 prepared at pH 11 and calcined at 600℃. The temperature of 90% CO conversion for CO oxidation using La0.7Ce0.3CoO3 was 230℃. In contrast to the enhancement effect by Ce substitution, the partial substitution of Cu for Co in LaCoyCu1-yO3- decreased catalytic activities for CO oxidation reaction compared to that using LaCoO3. For selective CO oxidation, the best CO conversion was 66% at 230℃ for La0.7Ce0.3CoO3. The CO conversion of La0.7Ce0.3CoO3 was greatly increased from 66% to 91% as increasing O2 concentration from 1% to 2%.

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