Nanocasting Synthesis of Mesostructured Co₃O₄ via a Supercritical CO₂ Deposition Method and the Catalytic Performance for CO Oxidation

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• 作者：Yanhua Zhang (12)
  Aiqin Wang (1)
  Yanqiang Huang (1)
  Qinqin Xu (3)
  Jianzhong Yin (3)
  Tao Zhang (1) taozhang@dicp.ac.cn
• 关键词：Mesoporous – ; Nanocasting – ; Co3O4 – ; Supercritical CO2 – ; CO oxidation
• 刊名：Catalysis Letters
• 出版时间：February 2012
• 出版年：2012
• 期刊代码：13_1011372X
• 类别：ch
• 卷：142
• 期：2
• 页码：275-281
• 数据来源：sp

摘要

Abstract We demonstrate a supercritical CO₂ (scCO₂) deposition method to synthesize mesostructured Co₃O₄ with crystalline walls using SBA-15 as the hard template. By variation of the scCO₂ pressure, randomly organized nanorods or a highly ordered mesoporous structure of Co₃O₄ is obtained after only one filling operation. The catalytic tests show that the randomly organized Co₃O₄ nanorods display excellent activity for CO oxidation with the complete conversion of CO even at room temperature, while neither the ordered mesoporous nor bulk Co₃O₄ is active at this low-temperature, demonstrating the important role of Co₃O₄ morphology in catalysis.