摘要
以单氰胺为石墨相氮化碳(g-C3N4)前驱体,中空碳纳米球(hollow carbon nanospheres, HCNs)为碳基底,热解制备核壳状石墨相氮化碳包覆中空碳(HCNs@g-C3N4)催化剂。通过扫描电镜、透射电镜、X射线衍射和红外吸收光谱对其形貌、结构、组成进行表征;并通过电化学工作站对其在碱性电解质中的氧气还原(oxygen reduction reaction, ORR)性能进行测试。探究HCNs、g-C3N4和HCNs@g-C3N4复合材料的结构对ORR性能的影响。结果表明,组成复合材料后,HCNs@g-C3N4的ORR性能相比HCNs,如半波电位提高了80 mV和循环稳定性保持最初电流的90%,得到显著提高。
Cyanamide usedas precursor of the graphitic carbon nitride (g-C3N4),hollow carbon nanospheres (HCNs) used as carbon support, core-shell HCNs@g-C3N4 catalysts were synthesized via a pyrolysis approach. The morphologies,structures, and compositions were characterized by scanning electronmicroscopy, transmission electron microscopy, X-ray diffraction and infraredspectra. The oxygen reduction reaction (ORR) performance was performed throughelectrochemical station in alkaline medium. The effect of structure on ORRperformance of HCNs, g-C3N4, and HCNs@g-C3N4 composites were studied. It was found that HCNs@g-C3N4 composites show greatly significant ORR performances compared to HCNs, such asimproving half-wave potential (80 mV) and maintaining long-term durability (90%relative to initial current).
出处
《纳米技术》
CAS
2021年第3期85-92,共8页
Hans Journal of Nanotechnology
