Rational design of nanostructured metal-organic frameworks (MOFs) for catalytic applications is an ongoing challenge. Here, a new hierarchical NiVFe-MOF composed of self-supported nanowires and nanosheets are first prepared through substrate-assisted solvothermal growth. The MOF nanowires and nanosheets are tightly assembled into an integrated nanostructure with facile mass transfer. At the same time, the microstructure of the nanowires/nanosheets exhibits abundant active sites due to the hierarchical porosity. As resultant NiVFe-MOF exhibits significantly enhanced activity in oxygen evolution reaction (OER). The resulting MOF yields a low overpotential (225 mV, 10 mA cm⁻²; 269 mV, 100 mA cm⁻²) and high stability after long-term cycling test, suggesting a state-of-the-art performance. This study can provide new insights on rational design and synthesis of nanostructured MOFs for catalytic applications.

合理设计用于催化应用的纳米结构金属有机骨架（MOF）是一项持续的挑战。在这里，首先通过基质辅助溶剂热生长制备了由自支撑纳米线和纳米片组成的新型分层NiVFe-MOF。MOF纳米线和纳米片被紧密地组装成一个集成的纳米结构，并具有容易的质量传递。同时，由于分层的孔隙率，纳米线/纳米片的微观结构表现出丰富的活性位点。结果，NiVFe-MOF在氧气析出反应（OER）中显示出明显增强的活性。产生的MOF产生低过电位（225 mV，10 mA cm ^-2 ; 269 mV，100 mA cm ^-2）和长期循环测试后的高稳定性，这表明它具有最先进的性能。这项研究可以为催化应用的纳米结构MOF的合理设计和合成提供新的见解。