Mesoporous Co₃O_3.87◻_0.13 (◻ represents oxygen vacancies) and Co₃O_3.87F_0.13 electrocatalysts, integrating advantages of oxygen vacancies and fluorine anion, were deployed. Co₃O_3.87◻_0.13 and Co₃O_3.87F_0.13 showed enhanced oxygen evolution reaction (OER) with overpotentials of 440 mV and 430 mV at 10 mA cm⁻², Tafel slopes of 56 mV dec^-1 and 56 mV dec^-1, turnover frequency (TOF_{η= 400 mV}) of 0.023 s^-1 and 0.042 s^-1 respectively, as compared to Co₃O₄ (520 mV, 64 mV dec^-1, 0.0005 s^-1) in the alkaline medium. Physicochemical characterizations showed that oxygen vacancies and the substituted fluorine modified the electronic structure, leading to the enhanced activity for OER process, consistent with the theoretical calculation. This approach provides ideas for rational design of new defective fluorinated oxide, with the feasible extension of such an approach to a wide variety of transition metal oxides.

介孔共₃ ö _3.87 ◻ _0.13（◻表示氧空位）和Co ₃ ö _3.87 ˚F _0.13电催化剂，整合氧空位和氟阴离子的优势，被部署。共₃ ö _3.87 ◻ _0.13和Co ₃ ö _3.87 ˚F _0.13表明增强的析氧反应（OER）与440毫伏和430毫伏的超电势在10mA厘米^-2，56毫伏癸的Tafel斜率^-1和56毫伏癸^-1，周转频率（TOFη _{= 400 mV}）为0.023 s ^-1和0.042小号^-1分别相比，共₃ ö ₄（520毫伏，64毫伏癸^-1，0.0005小号^-1在碱性介质中）。理化特性表明，氧空位和取代的氟修饰了电子结构，从而提高了OER工艺的活性，与理论计算相符。这种方法为合理设计新的有缺陷的氟化氧化物提供了思路，并且将这种方法可行地扩展到各种过渡金属氧化物。