La_0.9Ba_0.1CoO₃ perovskite type catalysts for the control of CO and PM emissions

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• 作者：Pradeep Doggali ; S. Kusaba ; Y. Teraoka ; P. Chankapure ; S. Rayalu ; Nitin Labhsetwar
• 关键词：Lanthanum cobaltate ; Perovskite ; CO ; PM emission ; Sol– ; gel synthesis
• 刊名：Catalysis Communications
• 出版年：2010
• 出版时间：10 March 2010
• 年：2010
• 卷：11
• 期：7
• 页码：665-669
• 全文大小：427 K

文摘

Perovskite type catalysts with LaCoO₃ and La_0.9Ba_0.1CoO₃ compositions have been prepared by sol–gel method and their catalytic activity was studied for CO oxidation in presence of CO₂, water and also for particulate matter (PM)/carbon oxidation. The catalysts were characterized using XRD, BET-SA, SEM, TPD, XPS and their catalytic activity was evaluated using a steady state gas evaluation assembly, as well as thermo gravimetric analysis. La_0.8Ba_0.1CoO₃ catalyst shows enhanced catalytic activity as compared to LaCoO₃ for CO and PM oxidation. Barium substitution appears to be responsible for low temperature activity of the catalyst by influencing redox and oxygen desorption properties as also suggested by TPD studies.