To meet the increasing energy demand, the research and development of efficient and clean fuel cells and metal-air batteries are of great significance. Under these circumstances, these hierarchically porous carbon nanomaterials obtained by pyrolysis of coordination polymers are regarded as excellent oxygen reduction catalysts and are expected to be used as air cathode materials. Herein, a type of 2-dimensional structure of InOF-26 has been thermally converted into ultrathin graphitized nitrogen-doped carbon nanosheets, denoted as NG-CNS. During the carbonization, the addition of ferric chloride assists in breaking the intermolecular forces between crystal structures, which is further conducive to the formation of carbon nanosheets with an improved graphitization degree. Meanwhile, the subsequent ammonia impregnation together with secondary calcination can readjust the coordination environment of nitrogen species in the carbonaceous matrix. The obtained product of NG-CNS exhibits excellent ORR performance with a high half-wave potential of 0.80 V, a large diffusion-limited current density of 6.00 mA cm⁻², a small Tafel slope of 57.3 mV dec⁻¹, to show unexpected practicability in Zn-air battery and Al-air battery. The relatively simple synthetic procedure, low cost, high repeatability, and satisfactory electrochemical performance of NG-CNS will provide a direction for the facile preparation of coordination polymer-derived carbon nanomaterials in energy storage and conversion applications.

为满足日益增长的能源需求，研发高效清洁的燃料电池和金属空气电池具有重要意义。在这种情况下，这些通过配位聚合物热解获得的分级多孔碳纳米材料被认为是优异的氧还原催化剂，有望用作空气阴极材料。在此，一种二维结构的 InOF-26 已被热转化为超薄石墨化氮掺杂碳纳米片，表示为 NG-CNS。在碳化过程中，氯化铁的加入有助于打破晶体结构之间的分子间作用力，进一步有利于石墨化程度提高的碳纳米片的形成。同时，随后的氨浸渍和二次煅烧可以重新调整碳质基质中氮物种的配位环境。获得的NG-CNS产品表现出优异的ORR性能，具有0.80 V的高半波电位，6.00 mA cm的大扩散限制电流密度^-2，57.3 mV dec ^-1的小塔菲尔斜率，显示出在锌空气电池和铝空气电池中的意外实用性。NG-CNS相对简单的合成工艺、低成本、高重复性和令人满意的电化学性能将为在能量存储和转换应用中轻松制备配位聚合物衍生的碳纳米材料提供方向。