Recently, metal-organic framework (MOF), as a non-noble metal material, has been widely studied for its great potential in catalysis. In this work, a group of hydrothermal growth of CoCu bimetallic active center organic frameworks on three-dimensional graphene sponge (3DGS-CoCu-MOF) were designed, and fabricated as an electrocatalyst for oxygen evolution reaction (OER). A series of electrochemical experiments showed that in the 0.1 mol L^-1 KOH electrolyte, the overpotential of the optimal 3DGS-Co_3.0Cu_1.0-MOF was 460 mV, the slope of Tafel curve was 172 mV dec^-1, the charge transfer resistance (Rct) was16.38 Ω cm^-2, ECSA was 12.5 cm^-2, and R_f was 176.06. After the test of 20000 s, the current density still maintains 95.07%. The better electrocatalytic performance and the long-term electrochemical durability indicated that the 3DGS-Co_3.0Cu_1.0-MOF material possessed good OER performance. The optimal 3DGS-Co_3.0Cu_1.0-MOF employed three-dimensional graphene sponge as the conductive substrate, bimetallic active center acted as the main body of the catalyst, and made full use of the synergistic effect of the bimetallic center. Therefore it is a promising catalyst material for the electrolysis of water.

近年来，金属有机骨架（MOF）作为一种非贵金属材料，因其在催化方面的巨大潜力而​​受到广泛研究。在这项工作中，设计了一组在三维石墨烯海绵 (3DGS-CoCu-MOF) 上水热生长的 CoCu 双金属活性中心有机骨架，并将其制备为析氧反应 (OER) 的电催化剂。一系列电化学实验表明，在0.1  mol  L ^-1 KOH电解液中，最佳3DGS-Co _3.0 Cu _1.0 -MOF的过电位为460  mV，Tafel曲线斜率为172  mV dec ^-1，电荷转移电阻(Rct) 为 16.38 Ω cm ^-2，ECSA 为 12.5  cm ^-2，R _f为 176.06。经过 20000s的测试，电流密度仍保持95.07%。更好的电催化性能和长期电化学耐久性表明3DGS-Co _3.0 Cu _1.0 -MOF材料具有良好的OER性能。最优的3DGS-Co _3.0 Cu _1.0 -MOF采用三维石墨烯海绵作为导电基材，双金属活性中心作为催化剂主体，充分利用了双金属中心的协同作用。因此，它是一种很有前途的水电解催化剂材料。