中空碳球粒径对其氧气还原反应的影响
The Effect of Size of Hollow Carbon Spheres on Oxygen Reduction Reaction

利用软模板法合成聚吡咯包覆聚苯乙烯(Polystyrene@Polypyrrole, PS@PPy)微球，通过改变十二烷基硫酸钠的用量调控其粒径。采用扫描电镜、透射电镜、X射线衍射和氮气吸脱附技术对其形貌、结构、比表面积进行表征；并通过旋转圆盘电极对其在碱性条件下的氧气还原(Oxygen Reduction Reaction, ORR)性能进行测试。探究PS@PPy微球衍生的不同粒径(50 nm, 80 nm, 160 nm, 200 nm, 400 nm)中空碳球(Hollow Carbon Spheres, HCS)对ORR性能的影响。结果表明，200 nm直径的HCS具有最高的Langmuir比表面积(732.9 m²？g^？1)和孔体积(0.45 cm³？g^？1)，展现出更高的半波电位，经过10,000s加速耐久性测试，循环稳定性保持最初电流的92.1%。
Polypyrrole-coated polystyrene (PS@PPy) microspheres were synthesized by the soft template method, and the particle size of PS@PPy could be controlled by changing the dosage of sodium dodecyl sulfate. Their morphologies, structures, and surface area were characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction and N₂ adsorption-desorption analysis. The rotation disk electrode was used to measure its Oxygen Reduction Reaction (ORR) under alkaline electrolytes. To explore the effect of different particle sizes (50 nm, 80 nm, 160 nm, 200 nm, 400 nm) of PS@PPy derived Hollow Carbon Spheres (HCS) on ORR performance. The results showed that the HCS with a diameter of 200 nm had the highest Langmuir surface area (732.9 m²？g^？1) and pore volume (0.45 cm³？g^？1), exhibited higher half-wave potential, and maintained a cyclic stability of 92.1% of the initial current after 10,000s accelerated durability test.