A novel strategy has been developed to prepare hierarchical porous carbon with ultra-high N-doping through a dual template-approach, including simple polycondensation of precursor between melamine and formaldehyde, introduction of magnesium oxide and titanium dioxide dual templates, carbonization, and removal of template. The dual template-approach creates hierarchical nanopores in the prepared nanoporous carbons (TMCs) and improves the specific surface area of the TMCs (960 m²/g). Additionally, cations and anions of MgO and TiO₂ can improve thermal stability of N atoms, leading to high N content of TMCs (11.7–26.31 at.%). With excellent surface area and high N content, the prepared TMCs achieves unique electrochemical performances. For oxygen reduction, the onset potential of TMC800 is 1.02 V (vs. RHE); the kinetic current density (J_k) of TMC800 is 6.78 mA cm⁻² (0.6 V); for Zn-air batteries, the maximum power density of TMC800 is 87 mW cm⁻² (vs. 70 mW cm⁻² of commercial Pt/C catalyst). For supercapacitor, TMC900 has high specific capacitance (805F g⁻¹), and its symmetrical supercapacitor has an energy density of 9.8 Wh kg⁻¹ at a power density of 250 W kg⁻¹.

开发了一种新策略，通过双模板方法制备具有超高氮掺杂的分级多孔碳，包括三聚氰胺和甲醛之间前驱体的简单缩聚、引入氧化镁和二氧化钛双模板、碳化和去除模板。双模板方法在制备的纳米多孔碳（TMC）中创建了分层纳米孔，并提高了TMC的比表面积（960 m ² /g）。此外，MgO和TiO ₂的阳离子和阴离子可以提高N原子的热稳定性，从而导致TMCs的高N含量（11.7–26.31 at.%）。所制备的TMCs具有优异的表面积和高氮含量，实现了独特的电化学性能。对于氧还原，TMC800 的起始电位为 1.02 V（相对于 RHE）；TMC800的动态电流密度(J _k )为6.78 mA cm ^-2 (0.6 V)；对于锌空气电池，TMC800的最大功率密度为87 mW cm ^-2（而商用Pt/C催化剂为70 mW cm ^{-2 ）。}对于超级电容器，TMC900具有高比电容（805F g ^-1），其对称超级电容器在功率密度为250 W kg ^{-1时能量密度为9.8 Wh kg -1}。