Layer‐structured birnessite (δ‐MnO₂) has been applied recently in the heterogeneous Fenton‐like process. However, easy deactivation and low utilization efficiency of H₂O₂ limit its practical application. The catalytic processes of H₂O₂ on birnessite were successfully regulated via surface chemical modification as Cu²⁺ ions were intercalated into the birnessite by the ion‐exchange method (CuBir). The triple‐corner‐sharing inner‐sphere surface complexes of Cu²⁺ ions (TCS species) formed above Mn vacancies could effectively weaken the over‐complexation of H₂O₂ on the surface of [MnO₆] sheets, and then decrease the self‐consumption of surface‐formed superoxide radicals. The surface TCS species have excellent Fenton‐like performances and enhance the conversion efficiency of H₂O₂ into reactive oxygen species (ROS). Moreover, the surface Cu²⁺‐modification engineering could prevent deactivation owing to degradation intermediate residues and improve the recyclability of catalyst.

中文翻译：

---

表面改性Cu 2+的基于水钠锰矿的Fenton样反应的催化工艺优化

层结构的水钠锰矿（δ-的MnO ₂）已被在异构类芬顿处理最近应用。但是，H ₂ O ₂容易失活，利用率低，限制了其实际应用。通过离子交换法（CuBir）将Cu ²⁺离子插入水钠锰矿中，可以通过表面化学改性成功控制H ₂ O ₂在水钠锰矿上的催化过程。在Mn空位上方形成的Cu ²⁺离子（TCS物种）的三角共享内球表面复合物可以有效地削弱[MnO ₆表面上的H ₂ O ₂的过度复合化]纸，然后减少表面形成的超氧自由基的自消耗。表面TCS物质具有出色的Fenton样性能，并提高了H ₂ O ₂转化为活性氧（ROS）的效率。此外，表面Cu ²⁺改性工程可以防止由于降解中间残留物而引起的失活，并提高催化剂的可回收性。