The oxygen vacancies of defective iron–cobalt oxide (FeCoO_x ‐Vo) nanosheets are modified by the homogeneously distributed sulfur (S) atoms. S atoms can not only effectively stabilize oxygen vacancies (Vo), but also form the Co−S coordination with Co active site in the Vo, which can modulate the electronic structure of the active site, enabling FeCoO_x ‐Vo‐S to exhibit much superior OER activity. FeCoO_x ‐Vo‐S exhibits a mass activity of 2440.0 A g⁻¹ at 1.5 V vs. RHE in 1.0 m KOH, 25.4 times higher than that of RuO₂. The Tafel slope is as low as 21.0 mV dec⁻¹, indicative of its excellent charge transfer rate. When FeCoO_x ‐Vo‐S (anode catalyst) is paired with the defective CoP₃/Ni₂P (cathode catalyst) for overall water splitting, current densities of as high as 249.0 mA cm⁻² and 406.0 mA cm⁻² at a cell voltage of 2.0 V and 2.3 V, respectively, can be achieved.

中文翻译：

---

氧化铁钴纳米片中的硫改性氧空位：使氧释放反应的极高活性得以实现工业水分解基准。

有缺陷的铁-钴氧化物（FeCoO _x -Vo）纳米片的氧空位被均布的硫（S）原子修饰。S原子不仅可以有效地稳定氧空位（Vo），而且可以与Vo中的Co活性位点形成Co-S配位，从而可以调节活性位点的电子结构，从而使FeCoO _x -Vo-S表现出很多卓越的OER活性。FeCoO _x -VoS在1.0 m KOH中在1.5 V相对于RHE的质量活性为2440.0 A g ^-1， 比RuO ₂高25.4倍。塔菲尔斜率低至21.0 mV dec ^-1，表明其极好的电荷传输速率。当FeCoO _x‐Vo‐S（阳极催化剂）与有缺陷的CoP ₃ / Ni ₂ P（阴极催化剂）配对使用，以实现整体水分解，在电池电压为60°C时电流密度高达249.0 mA cm ^-2和406.0 mA cm ^-2分别可以达到2.0 V和2.3V。