The photosynthesis of hydrogen peroxide (H₂O₂), involving water oxidation and oxygen reduction, is crucial for optimizing light utilization. Here, a previously synthesized one-dimensional chain-like semiconductive uranyl coordination polymer (NDC-UCP) was used for the efficient overall photosynthetic reaction of H₂O₂ and its photocatalytic mechanism was systematically investigated. The excellent stability of NDC-UCP enables continuous H₂O₂ production for up to 96 h. Its unique hydrogen extraction capability enhances the photocatalytic performance, achieving a H₂O₂ production rate of 283.80 μmol g^–1 h^–1. Two mechanisms for H₂O₂ generation were revealed: efficient electron–hole separation in NDC-UCP facilitates a two-step one-electron oxygen reduction and direct water oxidation, while hydrogen abstraction of UO₂²⁺ generates hydroxyl (·OH) and hydroperoxyl radicals (HO₂^·), enhancing H₂O₂ photosynthesis. This study highlights the potential of uranyl coordination polymers in H₂O₂ production and their synergistic exciton dissociation and hydrogen abstraction functionalities in photocatalytic redox reactions.

中文翻译：

---

使用铀酰配位聚合物对过氧化氢进行持久光合作用：激子解离和氢提取


过氧化氢 （H₂O₂） 的光合作用涉及水氧化和氧还原，对于优化光利用至关重要。本研究采用一维链状半导电铀酰配位聚合物 （NDC-UCP） 进行 H₂O₂ 的高效整体光合反应，并系统研究了其光催化机理。NDC-UCP 出色的稳定性使 H₂O₂ 的连续生产长达 96 小时。其独特的氢萃取能力增强了光催化性能，实现了 283.80 μmol g^–1 h^–1 的 H₂O₂ 生成速率。揭示了 H₂O₂ 生成的两种机制：NDC-UCP 中的高效电子-空穴分离促进了两步单电子氧还原和直接水氧化，而 UO₂²⁺ 的氢提取产生羟基 （·OH） 和氢过氧自由基 （HO₂） 的光合作用，增强 H₂O₂ 的光合作用。本研究强调了铀酰配位聚合物在 H₂O₂ 生产中的潜力及其在光催化氧化还原反应中的协同激子解离和氢提取功能。