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将含氮聚合物聚苯胺(PANI)均匀地担载到具有大比表面积、多级孔结构和高导电性的3D碳纳米笼(CNC)表面,再热解PANI制得了N掺杂位富集于表面、且具有优良导电性的碳基纳米材料.通过改变热解温度和前驱物中PANI的含量,对热解产物的表面N含量和导电性进行了调控.优化得到的NCNC-2-900催化剂具有优异的氧还原反应(ORR)催化性能,其起始电位高(-46 m V vs Ag/Ag Cl),明显优于体相N掺杂的CNC(-105 m V),且稳定性好(运行10 h后仍保留96%活性).该结果表明在保持良好导电性的同时增加表面N掺杂位是提高碳基材料ORR活性的有效途径.
The polyaniline (PANI) containing nitrogen polymer was uniformly loaded onto the surface of a 3D carbon nanocage (CNC) with large specific surface area, multi-level pore structure and high electrical conductivity. PANI was pyrolyzed to obtain N-doped sites On the surface, and has excellent conductivity of carbon-based nano-materials.The surface N content and conductivity of the pyrolysis products are regulated by changing the pyrolysis temperature and the content of PANI in the precursor.The optimized NCNC-2-900 The catalyst has excellent ORR catalytic performance with a high initial potential (-46 m V vs Ag / Ag Cl), which is obviously superior to that of bulk N-doped CNC (-105 mV), and the stability (96% activity remains after 10 h operation) This result shows that increasing surface N doping while maintaining good conductivity is an effective way to improve the ORR activity of carbon-based materials.