Water oxidation (2 H₂O → 4H⁺ + 4 e^- + O₂) is a key step in utilization of solar energy for producing hydrogen of artificial photosynthetic system. Inspired by the oxygen evolution complex (OEC) in PSII, molecular catalysts are extensively studied and the progress both in biomimetic studies and the mechanistic understanding is truly remarkable. While research efforts in the earlier years focused on the Ru-, Mn- and Ir-based complexes, the focus has gradually changed to non-precious catalysts based on earth-abundant metals (Fe, Co, Ni, Cu). These studies have deepened our understanding on the mechanism of water oxidation, including both proton-coupled electron transfer and O-O bond formation. Herein, we briefly review the research progress surrounding the construction of the OEC-like catalytic systems as well as bioinspired multi-nuclear catalysts for water oxidation.

水氧化（2 H ₂ O → 4H ⁺ + 4 e ^- + O ₂)是利用太阳能生产人工光合系统制氢的关键步骤。受 PSII 中析氧复合物 (OEC) 的启发，对分子催化剂进行了广泛的研究，在仿生学研究和机理理解方面取得了真正显着的进展。虽然早些年的研究工作集中在基于 Ru、Mn 和 Ir 的配合物上，但重点已逐渐转移到基于地球丰富金属（Fe、Co、Ni、Cu）的非贵金属催化剂。这些研究加深了我们对水氧化机制的理解，包括质子耦合电子转移和 OO 键形成。在此，我们简要回顾了围绕 OEC 类催化系统构建以及用于水氧化的仿生多核催化剂的研究进展。