In energy conversion systems, energy can be efficiently converted from one form to another form with catalysts, of which the design and synthesis are of great importance. Based on the remarkable traits of metal-organic frameworks, we have tuned the InOF-1 morphology by adding different amounts of the CTAB surfactant. Subsequently, as the rod-like InOF-1 with the highest adsorption capacity can encapsulate more metal ions, it is selected as the precursor to absorb the [Co(NH₃)₆]³⁺ ions and further calcined at high temperature to form N-doped carbon nanosheets containing Co NPs (Co-NCS). The resultant carbon nanomaterial shows a satisfying ORR performance (E_onset of 0.92 V vs. RHE, E_1/2 of 0.83 V vs. RHE and the J_L of 5.05 mA cm⁻²) and electrochemical stability (97.26% after 10 h) due to its hierarchical porosity, large specific surface area, abundant active sites and appropriate N-doping. Finally, an outstanding oxygen reduction property of the Co-NCS catalyst can be achieved to substitute the commercial Pt/C as the cathode catalyst for the Zn-air battery. This work would be expected to instructive in understanding ORR catalytic reaction and supplement a pathway to prepare MOFs-derived carbon nanomaterials for energy conversion and storage.

在能量转换系统中，可以使用催化剂将能量有效地从一种形式转换为另一种形式，其中催化剂的设计和合成非常重要。基于金属有机骨架的显着特征，我们通过添加不同量的CTAB表面活性剂来调节InOF-1形态。随后，由于具有最高吸附能力的棒状InOF-1可以包封更多的金属离子，因此将其选为吸收[Co（NH ₃）₆ ] ³⁺离子的前体，并在高温下进一步煅烧以形成N包含Co NPs（Co-NCS）的掺杂碳纳米片。所得碳纳米材料显示出令人满意的ORR性能（E_起始相对于RHE为0.92 V ， EHE为0.83 V对RHE的E _1/2和5.05 mA cm ^-2的J _L）和电化学稳定性（10 h后为97.26％），这归因于其分层的孔隙率，大的比表面积，丰富的有效位点和适当的氮掺杂。最后，可以实现Co-NCS催化剂出色的氧还原性能，以取代商用Pt / C作为Zn-空气电池的阴极催化剂。预期这项工作将对理解ORR催化反应具有指导意义，并补充一条制备MOF衍生的碳纳米材料用于能量转换和存储的途径。