Catalytic combustion of methane over Mn-substituted Ba-La-hexaaluminate nanoparticles

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• 作者：Shunqing Li ; Xiaolai Wang
• 关键词：Ba-La-hexaaluminate ; Catalytic combustion ; Methane ; Nanoparticle
• 刊名：Journal of Alloys and Compounds
• 出版年：2007
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：25 April 2007
• 卷：432
• 期：1-2
• 页码：333-337
• 文件大小：358 K

摘要

Mn-substituted Ba-La-hexaaluminate rod-like nanoparticles with high surface area in the range between 45 and 73 m²/g have been prepared using the alumina sol as the (NH₄)₂CO₃ co-precipitation precursor and the supercritical drying (SCD) method. The properties and microstructures of the catalysts are determined by the ion mobility at high calcination temperature. The nature of the large cation in the mirror plane can affect the Mn²⁺/Mn³⁺ redox process. The Ba_0.2La_0.8MnAl₁₁O_19−α catalyst possesses the highest catalytic activity owing to the excellent performance of activating oxygen.