Developing highly efficient and stable multi-functional metal-organic framework electrochemical materials is of prime importance for renewable energy technologies and electrocatalytic applications. Herein, a novel series of bimetallic metal-organic framework (MOF) hybrid materials were successfully designedly fabricated through an in-situ growth and MOF-on-MOF strategies, namely as NiFeMOF/NF, NiCoMOF/NF, FeMOF/NiMOF/NF, and CoMOF/NiMOF/NF. Benefiting from the synergistic effect of bimetallic centers, conductive substrate and unique fabrication, they exhibit remarking electrochemical performance. Among them, FeMOF/NiMOF/NF composite with ultrathin nanosheets displays the best electrochecatalytic performance with ultralow overpotentials of 293 mV at 50 mA cm^-2 and 359 mV at 100 mA cm^-2 for oxygen evolution reaction (OER), and remarking electrochemical stability with high current density of 100 mA cm^-2 after testing for 24 hours, that 88% of initial current density can be remained. Based on these fabricated bimetallic MOF hybrid materials as precursors, the corresponding MOF-derived nano sulfides were obtained with massive exposure of active sites. As an excellent supercapacitor electrode, NiCoS/NF-1 converted from CoMOF/NiMOF/NF shows admirable specific capacitance of 2815.4 F g^-1 at 1 mA cm^-2 and a remarkable rate capability of 82%.

开发高效，稳定的多功能金属有机骨架电化学材料对于可再生能源技术和电催化应用至关重要。本文中，通过原位生长和MOF-on-MOF策略成功设计出了一系列新颖的双金属金属有机骨架（MOF）杂化材料，例如NiFeMOF / NF，NiCoMOF / NF，FeMOF / NiMOF / NF，和CoMOF / NiMOF / NF。得益于双金属中心，导电基材和独特制造的协同作用，它们具有出色的电化学性能。其中，具有超薄纳米片的FeMOF / NiMOF / NF复合材料表现出最佳的电催化性能，在50 mA cm ^-2下超低电势为293 mV，在100 mA cm ^-2下超低电势为359 mV。对于氧气析出反应（OER），并在测试24小时后以100 mA cm ^-2的高电流密度表示电化学稳定性时，可以保留88％的初始电流密度。基于这些制造的双金属MOF杂化材料作为前体，获得了相应的MOF衍生的纳米硫化物，并且大量暴露了活性位点。作为优良的超级电容器电极，从CoMOF / NiMOF / NF转换而来的NiCoS / NF-1在1 mA cm ^-2时表现出令人赞叹的2815.4 F g ^-1的比电容，显着的倍率能力为82％。