Spinel is a desirable catalyst for active peroxymonosulfate (PMS) to degrade organic pollutants in complex water matrix. In this study, spinel-type Co₂MnO₄ catalyst were successfully synthesized and employed as an efficient PMS activator for the degradation of phenol in water (up to 100 % within 45 min, degradation rate constant (k) is 0.076 min⁻¹) at initial PH of 6.3. The excellent catalytic activity of Co₂MnO₄/PMS system was found to be attributed to its unique porous structure, oxygen vacancies and the synergistic effect of Co and Mn. Sulfate radicals (SO₄⁻) and singlet oxygen (¹O₂) all contributed to phenol degradation, and ¹O₂, a non-radical pathway mainly provided by oxygen vacancies of Co₂MnO₄, is the dominant reactive species in the activation system. The Co₂MnO₄/PMS system had good resistance to the common inorganic anions (Cl⁻, HPO₄²⁻, HCO₃⁻ and NO₃⁻) and exhibited great reusability due to the strong Co/Mn interaction. Finally, the phenol degradation mechanism in Co₂MnO₄/PMS system was also proposed based on the detected intermediates by GC–MS. Overall, the system composed of oxygen-enriched vacancy Co₂MnO₄ spinel catalyst and PMS has good degradation efficiency and is suitable for the remediation of organic pollutants in wastewater.

尖晶石是活性过氧单硫酸盐 (PMS) 降解复杂水基质中有机污染物的理想催化剂。在本研究中，成功​​合成了尖晶石型 Co 2 MnO 4 催化剂，并将其用作高效的 PMS 活化剂，用于降解水中的苯酚（45 分钟内达到 100%，降解速率常数 (k )_为0.076_分钟^-1）在 6.3 的初始 PH 值。_{Co 2} MnO ₄ /PMS体系优异的催化活性被发现归因于其独特的多孔结构、氧空位以及Co和Mn的协同作用。硫酸根 (SO ₄ ⁻ ) 和单线态氧 ( ¹ O ₂) 都有助于苯酚降解，而¹ O _{2是一种主要由 Co 2} MnO ₄的氧空位提供的非自由基途径，是活化体系中的主要活性物质。Co ₂ MnO ₄ /PMS 系统对常见的无机阴离子（Cl ^-、HPO ₄ ^2-、HCO ₃ ^-和NO ₃ ^-）具有良好的耐受性，并且由于强Co/Mn 相互作用而表现出很好的可重复使用性。_{最后，Co 2} MnO ₄中的苯酚降解机理/PMS 系统也是基于 GC-MS 检测到的中间体而提出的。总体而言，富氧空位Co ₂ MnO ₄尖晶石催化剂与PMS组成的体系具有良好的降解效率，适用于废水中有机污染物的修复。