As an ideal clean energy carrier, hydrogen is regarded as the most promising alternative to replace fossil fuels in the future energy system. Compared to the traditional steam reforming process, water electrolysis is an innovative method for green hydrogen production. The oxygen evolution reaction (OER) with slow kinetics limits the efficiency of water electrolysis, thus, the fabrication of efficient and robust electrocatalysts for OER is highly desirable to promote the development of hydrogen industry. Herein, we developed a robust OER electrocatalyst by coupling NiFeO_xH_y nanosheets with porous nickel (PN) substrate via bubble template method. The NiFeO_xH_y-PN electrocatalyst displays superior electrocatalytic performance, the overpotential for OER at 100 mA cm⁻² and 1000 mA cm⁻² are 265 mV and 326 mV, respectively. Especially, the NiFeO_xH_y-PN exhibits better activity and durability than the commercial Raney nickel (RN) in alkaline water electrolysis under industrial conditions, which indicates its potential for industrial application. This work provides an efficient strategy to synthesize advanced electrocatalyst for alkaline water electrolysis.

氢作为一种理想的清洁能源载体，被认为是未来能源系统中最有前景的替代化石燃料的替代品。与传统的蒸汽重整工艺相比，水电解是一种绿色制氢的创新方法。动力学缓慢的析氧反应（OER）限制了水电解的效率，因此，制备高效且稳定的 OER 电催化剂对于促进氢工业的发展非常重要。在此，我们通过气泡模板法将 NiFeO _x H _y纳米片与多孔镍 (PN) 基材偶联，开发了一种稳健的 OER 电催化剂。NiFeO _x H _y-PN 电催化剂显示出优异的电催化性能，OER 在 100 mA cm ^-2和 1000 mA cm ^{-2 下}的过电位分别为 265 mV 和 326 mV。特别是NiFeO _x H _y -PN在工业条件下的碱性水电解中表现出比商业Raney镍（RN）更好的活性和耐久性，这表明其具有工业应用的潜力。这项工作为合成用于碱性水电解的先进电催化剂提供了一种有效的策略。