The electrolysis of alkaline industrial sewage and seawater to produce hydrogen can alleviate the freshwater problem while also achieving clean energy production. Herein, we developed a three-dimensional spherical NiCoFe-LDH electrocatalyst for electrocatalytic oxygen evolution reaction (OER) by ions exchange and co-precipitate. The electronic interaction between the polymetallic ions optimizes the adsorption and desorption of the oxygen-containing intermediates. Compared to NiFe-LDH, the introduction of Co promoted the adsorption of OH* and the deprotonation of OOH* adsorbate intermediates. The prepared electrocatalyst shows good OER activity with a overpotential of 274 mV at 10 mA/cm². Furthermore, the prepared electrocatalysts exhibit good resistance to chloride ion corrosion, and the industrial-grade geometric current density of 500 mA/cm² could be achieved at a potential of approximately 1.68 V (vs. RHE) in strongly alkaline (6 M KOH) industrial sewage and seawater.

电解碱性工业污水和海水制取氢气可以缓解淡水问题，同时还可以实现清洁能源生产。在此，我们开发了一种三维球形NiCoFe-LDH电催化剂，用于通过离子交换和共沉淀进行电催化析氧反应（OER）。多金属离子之间的电子相互作用优化了含氧中间体的吸附和解吸。与NiFe-LDH相比，Co的引入促进了OH*的吸附和OOH*吸附物中间体的去质子化。^{制备的电催化剂表现出良好的OER活性，在10 mA/cm 2}下过电势为274 mV。此外，所制备的电催化剂表现出良好的耐氯离子腐蚀能力，在强碱性（6 M KOH）中约1.68 V（ vs . RHE）电位下可实现500 mA/cm ²的工业级几何电流密度。工业污水和海水。