Metal-organic framework (MOF), possessing versatile catalytic activities, remarkable structural diversity, high surface areas, and tunable pore sizes, was recently demonstrated an outstanding catalyst for electrolytic water splitting. The electrolytic performances can be much enhanced with a synergistic design of the MOFs, which was realized as uniformly well-mixed and dispersed Fe- and Ni-MOFs (termed as MFN-MOFs) in-situ grown on backbones of nickel foam (NF). The electrocatalyst thus developed exhibited ultra-high activities at high current densities for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1 M KOH, delivering 10 and 500 mA cm⁻² at ultralow overpotentials of 79 and 234 mV, respectively with a small Tafel slope of 30.1 mV dec⁻¹ for the HER and achieving ultralow overpotentials of 235 and 294 mV for the OER at 50 and 500 mA cm⁻², respectively with a small Tafel slope of 55.4 mV dec⁻¹. The inter-molecular synergistic interactions between the well-mixed and dispersed Fe- and Ni-MOFs not only facilitate the critical charge transfer for the redox reactions but also disperse the active metal ion sites to enhance their degree of utilization to achieve exceptional OER and HER performances. The MFN-MOFs/NF//MFN-MOFs/NF couple exhibited ultralow cell voltages of 1.495 [email protected] mA cm⁻² and 1.80 [email protected] mA cm⁻² with a Tafel slope of only 79.5 mV dec⁻¹ in 1 M KOH, outperforming most of the state-of-the-art bifunctional electrode couples and benchmark couple of Pt-C/NF//IrO₂/NF. More importantly, the MFN-MOFs/NF electrode exhibited ultrastability at high current densities, with a minor decay of 3.7% in a chronopotentiometric stability test conducted at a commercially viable high current density of 500 mA cm⁻² for overall water-splitting over 100 h. This synergistic effect boosting design concept for electrocatalysts was successfully demonstrated, opening up a new way for catalyst design toward large-scale H₂ production.

金属有机骨架（MOF）具有多种催化活性，显着的结构多样性，高表面积和可调节的孔径，最近被证明是用于电解水分解的杰出催化剂。借助MOF的协同设计，可以大大提高电解性能，这是通过在泡沫镍（NF）的骨架上原位生长的均匀混合和均匀分散的Fe-和Ni-MOF（称为MFN-MOF）实现的。 。如此开发的电催化剂在1 M KOH中以高电流密度在氢气析出反应（HER）和氧气析出反应（OER）中均表现出超高活性，以79和234 mV的超低超电势提供10和500 mA cm ^-2的电流，分别具有30.1 mV dec ^-1的小Tafel斜率对于HER，在50和500 mA cm ^-2时，OER分别实现235和294 mV的超低过电势，Tafel斜率为55.4 mV dec ^-1。充分混合和分散的Fe-和Ni-MOF之间的分子间协同相互作用不仅促进了氧化还原反应的关键电荷转移，而且分散了活性金属离子位点以提高其利用程度，从而获得优异的OER和HER表演。MFN-MOFs / NF // MFN-MOFs / NF对表现出1.495 [电子邮件保护] mA cm ^-2和1.80 [电子邮件保护] mA cm ^-2的超低电池电压，Tafel斜率仅为79.5 mV dec ^-1在1 M KOH中，性能优于大多数最新的双功能电极对和Pt-C / NF // IrO ₂ / NF的基准对。更重要的是，MFN-MOFs / NF电极在高电流密度下表现出超稳定性，在以500 mA cm ^-2商业可行的高电流密度进行的计时电位稳定性测试中，3.7％的轻微衰减可导致总水分解超过100 H。这种协同效应促进电催化剂设计的概念得到了成功证明，为大规模H _2的生产开辟了催化剂设计的新途径。