The development of efficient metal-free catalysts for oxygen reduction reaction (ORR) is of great importance for accelerating the commercial application of fuel cell. Here, a 3D interconnected N-doped porous carbon skeleton (PC) was prepared by one-step pyrolysis strategy with the help of recyclable NaCl. Combining the advantages of template and pyrolysis, the obtained N-PC-900 product showed a large specific surface area (470.9 m² g⁻¹), porous structure and high N contents (pyridinic N 30.2% and graphitic N 40.2%). The high I_D1/I_G value of 1.76 suggested that N-PC-900 had more defects which could be produced at 900°C. In alkaline condition, the prepared N-PC-900 exhibited positive onset potential (0.90 V), half-wave potential (0.75 V) and high current density (5.38 mA/cm² at 0.2 V), which was close to the 20% Pt/C. The number of transferred electrons was 3.87–3.98 at a potential of 0.055–0.9 V, meaning a 4e⁻ pathway towards the ORR. Meanwhile, the N-PC-900 displayed better durability and methanol tolerance for ORR in both acid and alkaline conditions than 20%Pt/C. This study provided a convenient and low-cost method to prepare high-performance metal-free ORR catalysts, and the product may have great potentials in ORR catalysis.

高效的无金属氧还原反应（ORR）催化剂的开发对于加速燃料电池的商业应用具有重要意义。在这里，借助可回收的NaCl通过一步热解策略制备了3D互连的N掺杂的多孔碳骨架（PC）。结合模板和热解的优点，获得的N-PC-900产物显示出大比表面积（470.9m ² g ^-1），多孔结构和高N含量（吡啶N 30.2％和石墨N 40.2％）。I _D1 / I _G的高值为1.76，表明N-PC-900具有更多的缺陷，可以在900°C时产生℃。在碱性条件下，制得的N-PC-900表现出正起始电位（0.90 V），半波电位（0.75 V）和高电流密度（0.2V时为5.38 mA / cm ²），接近20％铂/碳。转移的电子数目为3.87-3.98在0.055-0.9 V的电势，这意味着一个4E ^-朝向ORR通路。同时，N-PC-900在酸性和碱性条件下对ORR的耐久性和甲醇耐受性均优于20％Pt / C。这项研究为制备高性能的无金属ORR催化剂提供了一种方便且低成本的方法，该产品在ORR催化方面可能具有巨大的潜力。