A method for increasing the surface area of perovskite-type oxides

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• 作者：S. Banerjee (1)
  V. R. Choudhary (1) vrc@che.ncl.res.in
• 关键词：ABO3 ; type perovskite oxides ; LaCoO3 ; LaMnO3 ; hydrothermal treatment ; catalytic combustion of methane
• 刊名：Journal of Chemical Sciences
• 出版时间：October 2000
• 出版年：2000
• 期刊代码：19_0973-7103
• 类别：ch
• 卷：112
• 期：5
• 页码：535-542
• 数据来源：sp

摘要

A method based on hydrothermal treatments is described for increasing the surface area of sintered ABO₃-type perovskite oxides. Influence of hydrothermal treatments, such as water treatment at 125–300掳C under autogeneous pressure and steam treatment at 350–800掳C, to low surface area (or sintered) LaCoO₃ and LaMnO₃ perovskite oxides on their surface properties (viz. surface area, crystal size and morphology and surface La/(Co or Mn) ratio) and also catalytic activity in complete combustion of methane at different temperatures (450–600掳C) has been thoroughly investigated. The hydrothermal treatments result in the activation of the perovskite oxides by increasing their surface area very markedly.