The yolk-shell LaMnO₃ perovskite microspheres were fabricated by a novel, simple and mild soft template approach. A series of template-P123 concentrations (0-6.12 mmol∙L^-1) were employed to optimize the most complete spheres. When the concentration of P123 is 3.0 mmol∙L^-1, the obtained yolk-shell microspheres with a diameter of 200–700 nm were constructed by nanoparticles. The possible formation mechanism of the yolk-shell microspheres was revealed step by step via XRD, SEM, TEM, EDS and HRTEM. Molecules of P123 were suitably mixed with solvents for double shelled vesicles through self-assembly, which interacted with metal complexes to form P123-metal vesicles. After the removal of P123 and citric acid by calcination at 700 °C, the yolk-shell LaMnO₃ microspheres with through-channels were obtained. Through-channels on the surface were due to citric acid and the solid core was attributed to the shrink of inner vesicles. Prepared yolk-shell microsphere samples possessed a larger surface area and a higher maximum NO conversion value of 78% at 314 °C for NO oxidation, compared with samples without the yolk-shell structure.

卵黄壳型LaMnO ₃钙钛矿微球是通过新颖，简单，温和的软模板法制备的。使用一系列模板P123浓度（0-6.12 mmol∙L ^-1）优化最完整的球体。当P123的浓度为3.0mmol·L ^-1时，用纳米颗粒构建直径200-700 nm的卵黄壳微球。通过XRD，SEM，TEM，EDS和HRTEM逐步揭示了卵黄壳微球的可能形成机理。通过自组装将P123分子与溶剂混合，形成双壳囊泡，然后与金属络合物相互作用形成P123-金属囊泡。在700°C下煅烧除去P123和柠檬酸后，蛋黄壳型LaMnO_{获得了3个}具有通道的微球。表面上的贯通通道归因于柠檬酸，而固体核心归因于内部囊泡的收缩。与没有卵黄壳结构的样品相比，制备的卵黄壳微球样品在314°C时具有较大的表面积和较高的最大NO转化率，在314°C时NO氧化。