The poor activity and stability of electrode materials for the oxygen evolution reaction are the main bottlenecks in the water-splitting reaction for H₂ production. Here, by studying the activity–stability trends for the oxygen evolution reaction on conductive M¹O_xH_y, Fe–M¹O_xH_y and Fe–M¹M²O_xH_y hydr(oxy)oxide clusters (M¹ = Ni, Co, Fe; M² = Mn, Co, Cu), we show that balancing the rates of Fe dissolution and redeposition over a MO_xH_y host establishes dynamically stable Fe active sites. Together with tuning the Fe content of the electrolyte, the strong interaction of Fe with the MO_xH_y host is the key to controlling the average number of Fe active sites present at the solid/liquid interface. We suggest that the Fe–M adsorption energy can therefore serve as a reaction descriptor that unifies oxygen evolution reaction catalysis on 3d transition-metal hydr(oxy)oxides in alkaline media. Thus, the introduction of dynamically stable active sites extends the design rules for creating active and stable interfaces.

电极材料的氧释放反应活性和稳定性差是生产H ₂的水分解反应的主要瓶颈。在这里，通过研究氧在导电性M ¹ O _x H _y，Fe–M ¹ O _x H _y和Fe–M ¹ M ² O _x H _y羟基氧化物上的析出反应的活度-稳定性趋势（M ¹  = Ni，Co，Fe; M ²  = Mn，Co，Cu），我们证明在MO _x H _y上平衡Fe溶解和再沉积的速率主机建立动态稳定的Fe活性位点。与调节电解质中的Fe含量一起，Fe与MO _x H _y主体之间的强相互作用是控制固/液界面处平均Fe活性位点数量的关键。我们建议，Fe-M的吸附能因此可以作为反应描述语，以统一在碱性介质中对3d过渡金属氢氧化物的氧释放反应催化。因此，动态稳定的活动站点的引入扩展了用于创建活动和稳定接口的设计规则。