课题组近期研究发现，沉淀法能促进Co₃O₄溶入MnO₂晶格形成富含Co-O-Mn固溶体结构的CoMn氧化物催化剂。固溶体结构的形成可调节CoMn氧化物催化剂的氧空位和表面元素组成，并提高其低温可还原性能、氧脱附能力和氧迁移能力等。通过改变Co物种的含量可促进CoMn氧化物催化剂对甲苯和O₂分子的吸附和活化，实现甲苯的高效去除。Co含量为1.0%的Co₁Mn催化剂具有丰富的活性氧物种和氧空位，以及优异的低温可还原性能，有利于对甲苯和O₂分子的吸附和活化，从而表现出优异的甲苯催化氧化性能。在空气中甲苯浓度为10,000 ppm、反应温度为150 ℃时，Co₁Mn催化剂甲苯氧化转化率可达98%以上，经12 h稳定性和耐水性测试仍能维持高甲苯氧化性能。

Sijia Song（宋思佳）, Qianhao Qu, Hongmei Xie, Jie Zhang, Jia Zeng, Shuang Chen, Guilin Zhou*. CoMn solid solution oxide catalyst prepared by (NH₄)₂CO₃ co-precipitation method for toluene low temperature oxidation removal from air [J]. Inorganic Chemistry Communications, 2025, 179(1): 114678. https://doi.org/10.1016/j.inoche.2025.114678.

In this paper, the CoMn composite oxide catalysts with Co-O-Mn solid solution structure were prepared by a co-precipitation method. The characterization techniques, such as XRD, Raman, TEM, XPS, H₂-TPR and O₂-TPD, were employed for analyzing the physicochemical properties of the prepared catalysts, and the catalytic activity was evaluated by the toluene oxidation performance in air. Compared with the CoMn₂O₄ spinel composite oxide catalyst prepared by solvothermal method, the precipitation method can improve the Co species to dissolve into the MnO₂ lattice to form a Co-O-Mn solid solution. The interaction between Co and Mn oxides effectively weakened the metal-oxygen bonds. The results promoted the oxygen vacancies and active oxygen species to be formed on the surface of the corresponding catalysts, increased the oxygen movement in the CoMn composite oxide catalysts, and improved the catalytic oxidation performance of the corresponding catalysts. The Co₁Mn catalyst with a Co content of 1.0% could achieve a toluene oxidation removal rate over 97.0% at a reaction temperature of 150 °C. At the same time, the Co₁Mn catalyst has good stability and water resistance for toluene catalytic oxidation in air.