Chlorine evolution reaction (CER) usually requires catalyst with high content of noble metals for applications at large current density, thus hindering its industrial development. In this work, TiO₂ nanobelts supported RuO₂ nanoparticles (RuO₂-TiO₂ NBs-Ti) with ultralow Ru loading (0.83 wt%) is synthesized. It exhibits high activity for CER with 50 mA cm⁻² at only 1.13 V (vs. SCE) and mass activity of 57.1 A g⁻¹_Ru at 1.14 V, surpassing the dimensionally stable anode (DSA). And the activity can stably maintain at large current density of 300 mA cm⁻² for 408 h. Furthermore, it also shows high performance for degradation of NH₄⁺−N (98.9% within 90 min). The ideal performance is ascribed to the strong oxide-support interaction (SOSI) that tunes the interfacial electronic structure between mixing antase-rutile-TiO₂ and RuO₂, which improves the Volmer-Heyrovsky kinetic of CER. Meanwhile, it possesses nanobelt structure with a larger specific surface area, which can provide more active sites and is beneficial to the escape of bubbles on the electrode surface. This work provides a prospective direction for the synthesis of low-cost and high-activity CER catalyst at large current density.

析氯反应（CER）在大电流密度下的应用通常需要贵金属含量高的催化剂，从而阻碍了其工业化发展。在这项工作中，合成了具有超低 Ru 负载量 (0.83 wt%) 的TiO ₂纳米带负载 RuO ₂纳米粒子 (RuO ₂ -TiO _{2 NBs-Ti)。}它对 CER 表现出高活性，仅在 1.13 V（相对于SCE）时为 50 mA cm ^-2，在 1.14 V 时质量活性为 57.1 A g ^-1 _Ru，超过尺寸稳定阳极 (DSA)。且活性在300 mA cm ^{-2的大电流密度下仍能稳定保持}408 小时。_{此外，它还显示出高效的 NH 4} ⁺ −N降解性能（90 分钟内 98.9%）。理想的性能归因于强氧化物-载体相互作用 (SOSI)，它调节了混合的反钛矿-金红石-TiO ₂和 RuO ₂之间的界面电子结构，从而提高了 CER 的 Volmer-Heyrovsky 动力学。同时，它具有比表面积更大的纳米带结构，可以提供更多的活性位点，有利于电极表面气泡的逸出。该工作为在大电流密度下合成低成本、高活性的CER催化剂提供了一个有前景的方向。