Highly porous LaCoO₃ perovskite was synthesized by a nanocasting method using a mesoporous silica template and subsequently applied as a bifunctional catalyst for the oxygen reduction and evolution reactions in alkaline solution. The La-Co citrate complex was mixed a porous SBA-15 silica template, and then, calcinated at 650 °C to prepare a LaCoO₃/SBA-15 composite. Highly porous LaCoO₃ was prepared by treating this composite with NaOH to remove the SBA-15 silica template. The obtained LaCoO₃ showed a very rough surface, high surface area, and relatively small particle size compared with LaCoO₃ prepared by the sol-gel method. The catalytic performance of the highly porous LaCoO₃ for the oxygen reduction and evolution reactions was electrochemically measured in alkaline solution. LaCoO₃ prepared by the nanocasting exhibited higher cell performance than that prepared by sol-gel method due to its larger surface area.

通过使用中孔二氧化硅模板的纳米浇铸法合成高度多孔的LaCoO ₃钙钛矿，随后将其用作双功能催化剂，用于碱性溶液中的氧还原和放出反应。将柠檬酸La-Co复合物与多孔的SBA-15二氧化硅模板混合，然后在650℃下煅烧以制备LaCoO ₃ / SBA-15复合材料。通过用NaOH处理该复合材料以去除SBA-15二氧化硅模板来制备高度多孔的LaCoO ₃。与通过溶胶-凝胶法制备的LaCoO ₃相比，所获得的LaCoO ₃具有非常粗糙的表面，高表面积和相对较小的粒度。高孔隙度LaCoO ₃的催化性能在碱性溶液中电化学测量氧的还原和放出反应。通过纳米浇铸制备的LaCoO ₃由于具有较大的表面积而比通过溶胶-凝胶法制备的LaCoO ₃具有更高的电池性能。