Ozone pollution has long been a hazard to human health and ecosystems. Manganese oxides have been intensively investigated for O₃ decomposition, but improving the catalytic activity and stability of MnO_x remains challenging. Herein, hexagonal birnessites with varying degrees of c-disordering were synthesized and showed strikingly different catalytic activities. As the degree of c-disordering increase, the highly disordered birnessite (HDB) possessed the highest content of oxygen vacancies (V_O) and thus demonstrated the superior catalytic activity. The HDB remained a high O₃ conversion efficiency of 96% even after reaction for 24 h at a high space velocity of 600,000 mL·g⁻¹·h⁻¹ and under the relative humidity of 50%. At the same time, HDB could be easily regenerated after heating for 1 h at 200 °C under air atmosphere. We found two different types of V_O (the in-layer V_O and the out-of-layer V_O) on the c-disordered birnessites, and the out-of-layer V_O was more stable than the in-layer V_O. The out-of-layer V_O was beneficial to desorption of the intermediate O₂^2– and reduced the competitive adsorption of H₂O, which accounted for the enhanced catalytic stability of HDB. This work may provide guidance for the V_O engineering in metal oxides toward the catalytic purification of waste gases.

长期以来，臭氧污染一直危害着人类健康和生态系统。锰氧化物已针对 O ₃分解进行了深入研究，但提高 MnO _x的催化活性和稳定性仍然具有挑战性。在此，合成了具有不同程度c无序的六方水钠钠锰矿，并显示出截然不同的催化活性。随着c无序程度的增加，高度无序的水钠锰矿 (HDB) 拥有最高含量的氧空位 ( V _O )，从而表现出优异的催化活性。组屋仍然是高 O ₃^{即使在600,000 mL·g -1} ·h ^-1的高空速和50%的相对湿度下反应24小时后，转化效率仍为96%。同时，HDB在空气气氛下200℃加热1小时后很容易再生。我们在c无序水钠锰矿上发现了两种不同类型的V _O（层内V _O和层外V _O），层外V _O比层内V更稳定_哦。层外VO有利于中间体O ₂ ^2–_{的解吸减少了H 2} O的竞争吸附，从而提高了HDB的催化稳定性。这项工作可能为金属氧化物中的V2O工程对废气的催化净化_提供指导。