Corrosion engineering is an efficient strategy to achieve durable oxygen evolution reaction (OER) catalysts at high current densities beyond 500 mA cm⁻². However, the spontaneous electrochemical corrosion has a slow reaction rate, and most of them need to add large amounts of salts (such as NaCl) to accelerate the corrosion process. In this report, a novel and effective phytic acid (PA)-assisted in situ electrochemical corrosion strategy is demonstrated to accelerate the the corrosion process and form bimetallic active catalysts to show excellent OER performance at large current densities. In situ rapid electrochemical corrosion of nickel foam substrate and PA ligands etching realize localized high concentrations of Ni and Fe ions. High concentrations of metal ions will combine with hydroxyl to effectively form defects-enriched NiFe layered double hydroxides porous nanosheets tightly anchoring on the underneath substrate. Remarkably, the activated electrode exhibits excellent OER catalytic activities with ultralow overpotentials of 289 and 315 mV to reach high current densities of 500 and 1000 mA cm⁻², respectively. When coupled with Ni-Mo-N hydrogen evolution reaction catalysts, the two-electrode cell merely requires 1.87 V to deliver 1000 mA cm⁻². The ligands-assisted rapid electrochemical corrosion strategy provides a fresh perspective for facile, cost-effective, and scale-up production of superior OER catalysts at large current densities.

^{腐蚀工程是在超过 500 mA cm -2}的高电流密度下实现耐用的析氧反应 (OER) 催化剂的有效策略。但自发的电化学腐蚀反应速度较慢，大多需要加入大量的盐类（如NaCl）来加速腐蚀过程。在本报告中，展示了一种新型有效的植酸 (PA) 辅助原位电化学腐蚀策略，可加速腐蚀过程并形成双金属活性催化剂，从而在大电流密度下表现出出色的 OER 性能。就地泡沫镍基板的快速电化学腐蚀和 PA 配体蚀刻实现了局部高浓度的 Ni 和 Fe 离子。高浓度的金属离子将与羟基结合，有效地形成富含缺陷的 NiFe 层状双氢氧化物多孔纳米片，紧密锚定在下面的基板上。值得注意的是，活化电极表现出优异的 OER 催化活性，具有 289 和 315 mV 的超低过电势，可分别达到 500 和 1000 mA cm ^-2的高电流密度。当与 Ni-Mo-N 析氢反应催化剂结合使用时，双电极电池仅需要 1.87 V 即可提供 1000 mA cm ^-2. 配体辅助的快速电化学腐蚀策略为在大电流密度下简便、经济和放大生产优质 OER 催化剂提供了新的视角。