Developing low-cost, active and durable electrocatalysts for oxygen evolution reaction (OER) is an urgent task for the applications such as water splitting and rechargeable metal-air battery. Herein, this work reports the fabrication of a metal and hetero atom co-doped fibrous carbon structure derived from cotton textile wastes and its use as an efficient OER catalyst. The free-standing fibrous carbon structure, fabricated with a simple two-step carbonization process, has a high specific surface area of 1796 m²/g and a uniform distribution of Fe₃O₄/NiS nanoparticles (Fe₃O₄/NiS@CC). The composite exhibits excellent OER performance with an onset potential of 1.44 V and a low overpotential of 310 mV at the current density of 10 mA/cm² in a 1.0 M KOH solution, which even surpass commercial RuO₂ catalyst. Additionally, this ternary catalyst shows remarkable long-term stability without current density loss after continuous operation for 26 h. It can be believed that the outstanding OER performance is attributed to the synergistic effect between the iron oxides and nickel sulphides, as well as the micro-meso porous carbon structure. This study demonstrates a new strategy to use conventional textile materials to prepare highly efficient electrocatalysts; it also provides a simple approach to turn textile waste into valuable products.

对于诸如水分解和可充电金属空气电池之类的应用，开发低成本，活性和耐用的氧释放反应（OER）电催化剂是紧迫的任务。本文中，这项工作报道了由棉纺织废料衍生的金属和杂原子共掺杂纤维碳结构的制备及其作为有效的OER催化剂的用途。采用简单的两步碳化工艺制造的独立式碳纤维结构，具有1796 m ² / g的高比表面积和Fe ₃ O ₄ / NiS纳米颗粒（Fe ₃ O _4）的均匀分布/ NiS @ CC）。该复合材料在1.0 M KOH溶液中的电流密度为10 mA / cm ^2时，具有出色的OER性能，起始电势为1.44 V，低过电势为310 mV ，甚至超过了RuO ₂催化剂。此外，这种三元催化剂在连续运行26小时后显示出显着的长期稳定性，而没有电流密度损失。可以相信，杰出的OER性能归因于氧化铁和硫化镍之间的协同作用，以及微介孔碳结构。这项研究表明了一种使用常规纺织材料制备高效电催化剂的新策略。它还提供了一种简单的方法来将纺织废料转变为有价值的产品。