Bimetallic metal organic framework (MOF) as a precursor to prepare catalysts with bifunctional catalytic activity of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) attracts more and more attention. Herein, hollow oxygen deficiency-enriched NiFe₂O₄ is synthesized by pyrolytic FeNi bimetallic MOF. The defects of rGO during carbonization can act as nucleation sites for FeNi particles. After nucleation and N doping, the FeNi particles were served as catalysts for the deposition of dissolved carbon in the defects of the N/rGO. These deposited carbon, like a bridge, connect N/rGO and hollow oxygen deficiency-enriched NiFe₂O₄ together, which giving full play to the advantages of N/rGO in fast electron transfer, thereby improving its catalytic activity. The resultant NiFe₂O₄@N/rGO-800 exhibits a low overpotential of 252 mV at 20 mA cm⁻² for OER and 157 mV at 10 mA cm⁻² for HER in 1 M KOH, respectively. When used as bifunctional electrodes for overall water splitting, it also shows low cell voltage of 1.60 V and 1.67 V at 10 and 20 mA cm⁻², respectively.

双金属金属有机骨架（MOF）作为制备具有氧分解反应（OER）和氢分解反应（HER）双功能催化活性的催化剂的研究越来越受到关注。在此，通过热解FeNi双金属MOF合成了富集中空缺氧的NiFe ₂ O ₄。碳化过程中rGO的缺陷可充当FeNi颗粒的成核位点。在成核和氮掺杂之后，FeNi颗粒用作催化剂，用于溶解碳沉积在N / rGO的缺陷中。这些沉积的碳像桥一样，将N / rGO与中空缺氧富集的NiFe ₂ O _{4连接起来}在一起，充分发挥了N / rGO在快速电子转移中的优势，从而提高了其催化活性。将所得的NiFe ₂ ö ₄ @ 20毫安厘米N / RGO-800表现出低的超电势252毫伏^-2在10mA厘米OER和157毫伏^-2，用于HER在1M KOH分别。当用作整体水分解的双功能电极时，它在10 mA和20 mA cm ^-2时也分别显示1.60 V和1.67 V的低电池电压。