2-dimensional Co nanoparticles embedded in N-doped carbon nanosheets (NCNS) are derived from indium-based frameworks which are impregnated with discrete [Co(NH₃)₆]³⁺ ions by high-temperature pyrolysis as a new approach to convert a 3-dimensional porous metal-organic frameworks (CPM-5) to 2-dimensional functional nanosheets. The as-made porous Co, N-doped carbon nanosheets (NCNS–Co_0.5In_0.5) perform the excellent ORR catalytic activity with a half wave potential of 0.82 V in comparison with the commercial Pt/C. Meanwhile, it also owns good stability and methanol tolerance as a suitable catalyst for zinc-air batteries with a high power density of 132.2 mW cm⁻². This method can easily be extended to other In-based MOFs, including QMOF-2, In-MIL-68, InOF-1, in which all the corresponding derived materials exhibit efficient ORR performance. Especially, the porous Co, N-doped carbon nanosheets annealed from InOF-1 (InOF-1-Co-800) display an E_onset of 0.93 V, a half-wave potential of 0.85V, and a diffusion-limited current of 5.40 mA cm⁻² density. Our work provides a new path to tune the morphology and catalytic performance of MOF derivatives.

嵌入N掺杂碳纳米片（NCNS）中的二维Co纳米粒子是从铟基骨架中衍生出来的，该骨架通过高温热解浸渍了离散的[Co（NH ₃）₆ ] ³⁺离子，作为一种转化碳纳米管的新方法。 3维多孔金属有机框架（CPM-5）到2维功能纳米片。制成的多孔Co，N掺杂碳纳米片（NCNS–Co _0.5 In _0.5）与商用Pt / C相比，具有0.82 V的半波电势，具有出色的ORR催化活性。同时，它还具有良好的稳定性和甲醇耐受性，作为适合用于功率为132.2 mW cm ^-2的锌-空气电池的催化剂。此方法可以轻松扩展到其他基于In的MOF，包括QMOF-2，In-MIL-68，InOF-1，其中所有相应的派生材料都具有有效的ORR性能。从退火特别地，多孔钴，N掺杂的碳纳米片InOF-1 （InOF-1的Co-800）显示的E_发病0.93 V，0.85V的半波电位的，和5.40的扩散限制电流mA cm ^-2密度。我们的工作为调整MOF衍生物的形态和催化性能提供了一条新途径。