Three-dimensional ordered meso-macroporous La_0.7Sr_0.3Fe_0.5Co_0.5O₃ (3DOM LSFCO)-supported Co₃O₄ catalysts were designed and prepared via a PMMA-templating strategy for the total oxidation of 1,2-dichloroethane (1,2-DCE). The physicochemical properties of all synthesized samples were characterized by XRD, FE-SEM, TEM, HAADF-STEM, low-temperature N₂ sorption, XPS, H₂-TPR, and in situ FT-IR. The introduction of Co₃O₄ increases the generation rate of oxygen vacancy, playing a crucial role in adsorption and activation of oxygen species. The special 3DOM structure of perovskite-type oxide promotes 1,2-DCE molecules to effectively and intimately contact with the surface adsorbed oxygen over supported catalysts and further accelerates the redox process. Compared with pure LSFCO, all the Co₃O₄ supported catalysts show superior catalytic performance with reaction rate increases from 5.53 × 10⁻¹² to 2.29 × 10⁻¹¹ mol g⁻¹ s⁻¹ and E_a decreases from 74.7 to 22.6 KJ mol⁻¹. Amongst, the 10Co₃O₄/3DOM LSFCO catalyst exhibits the best catalytic activity, highest resistance to chlorine poisoning and lowest by-products concentration because of the largest amount of surface adsorbed oxygen. CO₂, CO, HCl, and Cl₂ are the main oxidation productions, while some typical reaction intermediates such as vinyl chloride, 1,1,2-trichloroethane and trichloroethylene are also observed, especially over the 3DOM LSFCO sample. Furthermore, the reaction mechanism of 1,2-DCE oxidation over obtained catalysts was proposed based on the results of gas chromatography, in situ FT-IR, and on-line MS. It is believed that the Co₃O₄/3DOM LSFCO are promising catalysts for the total removal of chlorinated volatile organic compounds.

通过PMMA模板策略设计和制备了三维有序介孔大孔La _0.7 Sr _0.3 Fe _0.5 Co _0.5 O ₃（3DOM LSFCO）负载的Co ₃ O ₄催化剂（1 ，2-DCE）。通过XRD，FE-SEM，TEM，HAADF-STEM，低温N ₂吸附，XPS，H ₂ -TPR和原位FT-IR对所有合成样品的理化性质进行了表征。Co ₃ O ₄的引入增加了氧空位的产生率，在氧种类的吸附和活化中起着至关重要的作用。钙钛矿型氧化物的特殊3DOM结构促进了1,2-DCE分子与负载型催化剂上的表面吸附的氧有效且紧密地接触，并进一步加速了氧化还原过程。与纯LSFCO相比，所有由Co ₃ O ₄担载的催化剂均表现出优异的催化性能，反应速率从5.53×10 ^-12增至2.29×10 ^-11 mol g ^-1  s ^-1，E _a从74.7降低至22.6 KJ mol。^-1。其中，10Co ₃ O ₄/ 3DOM LSFCO催化剂表现出最佳的催化活性，最高的抗氯中毒性和最低的副产物浓度，因为表面吸附的氧量最大。CO ₂，CO，HCl和Cl ₂是主要的氧化产物，同时还观察到一些典型的反应中间体，例如氯乙烯，1,1,2-三氯乙烷和三氯乙烯，尤其是在3DOM LSFCO样品上。此外，基于气相色谱，原位FT-IR和在线MS的结果，提出了在所得催化剂上1,2-DCE氧化的反应机理。据信Co ₃ O ₄/ 3DOM LSFCO是有望完全去除氯化挥发性有机化合物的催化剂。