Transition metal compounds are considered to be one of the most feasible materials for electrocatalytic oxygen evolution. However, to fabricate highly active OER electrocatalysts, rational design of simple and effective strategies is still required. Herein, through hydrogen etching, we synthesizes defect-rich NiS with excellent catalytic performance for oxygen evolution, where it shows a low overpotential of 444 mV at 50 mA cm⁻², and a small Tafel slope of 48.32 mV dec⁻¹. Importantly, the characterization results implies that the NiS exhibits dynamic remodeling during the OER process to form NiOOH in situ. This work provides an effective strategy for transition metal compounds to enhance OER performance.

过渡金属化合物被认为是电催化析氧最可行的材料之一。然而，为了制造高活性的 OER 电催化剂，仍然需要合理设计简单有效的策略。在此，通过氢蚀刻，我们合成了富含缺陷的 NiS，其具有优异的析氧催化性能，在 50 mA cm ^{-2下显示出 444 mV 的低过电位和 48.32 mV dec -1}的小 Tafel 斜率。重要的是，表征结果表明 NiS 在 OER 过程中表现出动态重塑以原位形成 NiOOH。这项工作为过渡金属化合物提高 OER 性能提供了一种有效的策略。