A series of electrospun LaCoO₃ perovskites derived from CoX₂ (X = CH₃COO^–, NO₃^–) were prepared and investigated for total propane oxidation. It is shown that pure rhombohedral perovskite LaCoO₃ from Co(CH₃COO)₂ can be obtained at a relatively low temperature, 400 °C, benefitting from the complexation effect of CH₃COO^–. On the other hand, CH₃COO^– can accelerate the complete decomposition of polymer. The low‐temperature process can protect LaCoO₃ nanoparticles from growing up. As a result, Co(CH₃COO)₂‐derived catalysts exhibit better propane oxidation activity than the ones suffered the same thermal treatment by using Co(NO₃)₂. XPS and H₂‐TPR analysis provide that there is subtle change in Co³⁺/Co²⁺ on bulk/surface of Co(CH₃COO)₂‐derived catalysts prepared at different temperatures, giving rise to similar propane oxidation activities. Moreover, the result of cyclic stability test over 400 °C obtained catalyst shows little deactivation, demonstrating a good thermal stability. Our study can provide a feasible route for energy‐saving synthesis of LaCoO₃ catalyst applied in the catalytic oxidation of volatile organic compounds (VOCs).

中文翻译：

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通过电纺丝催化丙烷氧化低温合成Co（CH3COO）2衍生的LaCoO3的见解

制备了一系列由CoX ₂衍生的电纺LaCoO ₃钙钛矿（X = CH ₃ COO ^–，NO ₃ ^–），并进行了丙烷总氧化的研究。结果表明，得益于CH ₃ COO ^–的络合作用，可以在400°C的较低温度下从Co（CH ₃ COO）₂获得纯菱形钙钛矿型LaCoO ₃。另一方面，CH ₃ COO ^–可以促进聚合物的完全分解。低温工艺可以保护LaCoO ₃长大的纳米颗粒。结果，与使用Co（NO ₃）₂进行相同热处理的催化剂相比，衍生自Co（CH ₃ COO）_2的催化剂表现出更好的丙烷氧化活性。XPS和H ₂ -TPR分析表明，Co（CH ₃ COO）_2的体积/表面Co ³⁺ / Co ²⁺有细微变化在不同温度下制备的衍生催化剂，会产生相似的丙烷氧化活性。此外，在400℃以上获得的催化剂的循环稳定性测试的结果显示出极小的失活，表明了良好的热稳定性。我们的研究可以为在挥发性有机化合物（VOCs）催化氧化中应用的LaCoO ₃催化剂的节能合成提供一条可行的途径。