Developing non-noble-metal oxygen evolution reaction (OER) electrocatalysts with high performance is critical to electrocatalytic water splitting. In this work, we fabricated CoFe-layered double hydroxide (LDH) nanowire arrays on graphite felt (CoFe-LDH/GF) via a hydrothermal method. The CoFe-LDH/GF, as a robust integrated 3D OER anode, exhibits excellent catalytic activity with the need of low overpotential of 252 and 285 mV to drive current densities of 10 and 100 mA/cm² in 1.0 mol/L KOH, respectively. In addition, it also maintains electrochemical durability for at least 24 h. This work would open up avenues for the development of GF like attractive catalyst supports for oxygen evolution applications.

开发高性能的非贵金属析氧反应（OER）电催化剂对于电催化水分解至关重要。在这项工作中，我们通过水热法在石墨毡 (CoFe-LDH/GF) 上制造了 CoFe 层状双氢氧化物 (LDH) 纳米线阵列。CoFe-LDH/GF 作为坚固的集成 3D OER 阳极，表现出优异的催化活性，需要 252 和 285 mV 的低过电势才能在 1.0 mol/L KOH 中分别驱动 10 和 100 mA/cm ²的电流密度. 此外，它还能保持至少 24 小时的电化学耐久性。这项工作将为开发用于析氧应用的有吸引力的催化剂载体等 GF 开辟道路。