A trinuclear iron-oxo complex has been experimentally confirmed to be a regeneratable cocatalyst for hydrogen evolution from water splitting. This nano-sized trinuclear cluster with a seperated core structure that covalently connected by a central oxygen may show advantages for excellent separation and directional transfer of photogenerated electrons, promising a qualified substitute for noble metal cocatalysts. By combining with polyoxometalate as photocatalyst, the photocatalytic system proved a higher H₂ production than with commercial TiO₂. In addition, the polyoxometalate accelerated the H₂ production efficiency and made the reaction processes observable by the change in solution color. Cyclic experiments for over 40 hours proved the stability and regenerability of the cocatalyst. Furthermore, this cluster was 19 times more efficient than equimolar iron salt in H₂ evolution. This new attempt of applying multinuclear metal-oxo clusters in photocatalytic H₂ evolution may offer novel design strategies and low-cost cocatalyst candidate for enhanced photocatalytic H₂ evolution efficiency.

三核铁-氧配合物已通过实验证实是水分解产生氢气的可再生助催化剂。这种具有分离的核心结构的纳米级三核簇（通过中心氧共价连接）可能显示出光生电子极好的分离和定向转移的优势，有望成为贵金属助催化剂的合格替代品。通过与多金属氧酸盐结合用作光催化剂，该光催化体系证明了比市售TiO ₂更高的H ₂产生。另外，多金属氧酸盐加速了H ₂通过改变溶液的颜色可以提高生产效率并观察反应过程。超过40小时的循环实验证明了助催化剂的稳定性和可再生性。此外，在H ₂析出中，该簇的效率比等摩尔铁盐高19倍。这种在光催化H ₂放出中应用多核金属-氧代簇的新尝试可能会提供新颖的设计策略和低成本的助催化剂，以提高光催化H ₂放出效率。