γ-MnO₂, SmMnO₃, and γ-MnO₂/SmMnO₃ catalysts were prepared by facile methods, wherein the SmMnO₃ (SMO) perovskite was synthesized through one-step calcination and the γ-MnO₂/SmMnO₃ was formed by an in situ growth of γ-MnO₂ on the surface of SMO. These materials ware characterized by XRD, SEM-mapping, N₂-adsorption, XPS and H₂-TPR to investigate their textural properties. Compared with that of SMO and γ-MnO₂, the γ-MnO₂/SMO shows better performance for catalytic oxidation of aromatic VOCs in wet air (10 vol.%), which may be attributed to its higher surface molar ratio of lattice oxygen to adsorbed oxygen (O_latt/O_ads) and better low-temperature reducibility. Besides, for γ-MnO₂/SMO catalyst, a successive oxidation route and the inner principle of BETX (benzene, ethylbenzene, toluene, and o-xylene) oxidation were also revealed via various tests and a comprehension of dynamics investigation. Meanwhile, the experiments under simulated realistic exhaust conditions displayed that the γ-MnO₂/SmMnO₃ is also a good catalyst with high stability for aromatic VOCs oxidation, and fulfilled endurability to high humidity (20 vol.%).

γ-MnO的₂，SmMnO ₃和γ-MnO的₂ / SmMnO _3种通过简便的方法，其中，所述SmMnO制备催化剂₃（SMO）的钙钛矿通过一步法煅烧和合成的γ-MnO的₂ / SmMnO ₃被形成γ-MnO的的原位生长₂ SMO的表面上。这些材料通过XRD，SEM映射，N ₂吸附，XPS和H ₂ -TPR进行表征，以研究其织构特性。与SMO和γ-MnO的相比₂中，γ-MnO的₂，用于在湿空气芳香挥发性有机化合物的催化氧化（10 / SMO显示更好的性能体积。％），这可能归因于其较高的晶格氧与吸附的氧的表面摩尔比（O _latt / O _ads）和较好的低温还原性。此外，对于γ-MnO的₂ / SMO催化剂，连续氧化途径和BETX的内原则（苯，乙苯，甲苯和邻二甲苯）氧化还通过各种测试和动力学研究的理解揭示。同时，模拟现实排气条件下的实验中显示的γ-MnO的₂ / SmMnO ₃也与用于芳香挥发性有机化合物的氧化，稳定性高，并实现适应性高湿度（20良好的催化剂体积％）。