Octahedral CeO₂ microparticles possessing a stair-like microstructure comprising self-assembled nano-sized rectangular blocks were synthesized by a hydrothermal synthetic route. The samples were characterized by X-ray diffraction, scanning/transmission electron microscopy, and nitrogen adsorption/desorption techniques. The structural functions of the as-synthesized CeO₂ as support for the Pd catalyst were investigated by the catalytic oxidation of low-concentration methane. The results showed that the unique stair-like structure of CeO₂ improved the stability of the Pd catalyst for continuous conversion of low-concentration methane, which suggests that the as-synthesized CeO₂ has potential application in the removal of low-concentration methane from ventilation air and other oxidations.

中文翻译：

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阶梯状微结构CeO2上负载的钯催化剂为低浓度甲烷氧化提供增强的活性和稳定性

通过水热合成途径合成了具有阶梯状微观结构的八面体CeO ₂微粒，该微粒包括自组装的纳米级矩形块。通过X射线衍射，扫描/透射电子显微镜和氮吸附/解吸技术对样品进行表征。通过低浓度甲烷的催化氧化研究了合成的CeO ₂作为Pd催化剂载体的结构功能。结果表明，CeO ₂独特的阶梯状结构提高了低浓度甲烷连续转化的Pd催化剂的稳定性，表明合成后的CeO ₂ 在去除通风空气中的低浓度甲烷和其他氧化方面具有潜在的应用。