Developing cost efficient, robust, non-precious metal electrocatalysts for oxygen evolution reaction (OER) is a significant challenge in water splitting for renewable energy conversion. A novel electrocatalyst of heterogeneous ultra-thin FeCo-LDH@Co(OH)₂ nanosheets derived from 2D Zeolitic imidazolate framework facilitated electrons transfer for OER. DFT calculation revealed that heterogeneous interfaces reduced adsorption energy barriers of intermediates in rate-determining step of OER. The CoOOH with higher Co^III valence state derived from surface reconstruction, which was detected via in-situ Raman spectroscopy, activated O ions to provide higher intrinsic activity. XPS results confirmed that electrons transfer from Co(OH)₂ to FeCo-LDH accelerated alkaline OER kinetics. The FeCo-LDH@Co(OH)₂–0.5 exhibited low overpotentials of 230 mV at 10 mA cm⁻² and maintained long durability for 300 h. This study opened up a new method for design and synthesis of ultrathin LDHs electrocatalysts.

开发用于析氧反应（OER）的经济高效、坚固耐用的非贵金属电催化剂是可再生能源转化水分解中的一项重大挑战。一种源自二维沸石咪唑酯骨架的异质超薄 FeCo-LDH@Co(OH) ₂纳米片的新型电催化剂促进了 OER 的电子转移。DFT计算表明，异质界面降低了OER速率决定步骤中中间体的吸附能垒。通过原位拉曼光谱检测到，通过表面重构获得的具有较高 Co ^III价态的 CoOOH ，激活 O 离子以提供更高的本征活性。XPS 结果证实电子从 Co(OH) _2转移FeCo-LDH 加速碱性 OER 动力学。FeCo-LDH@Co(OH) _{2 –0.5在10 mA cm} ^-2下表现出230 mV的低过电势，并保持300小时的长耐久性。该研究为超薄LDHs电催化剂的设计和合成开辟了新方法。