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利用催化气相化学沉积(Catalytic chemical vapor deposition,CCVD)法在炭纸上原位生长得到CNF/CP复合体,并对这种复合体的物理化学性能和氧气电催化还原反应(Oxygen reduction reaction,ORR)性能进行了研究。结果表明:纳米炭纤维较为均匀地分散在炭纸上,其中纳米炭纤维具有窄的直径分布。所制CNF/CP复合体具有较大的比表面积和独特的中孔结构;相对于炭纸,CNF/CP复合体的端面碳原子和基面碳原子比例较高。另外,CNF/CP还具有较高的ORR反应活性,其ORR为2电子反应过程,原因可以归结于纳米炭纤维独特的微结构。同时,CNF/CP也具有较高的交换电流密度和较正的平衡电压。
The CNF / CP composite was grown in situ on a carbon paper by the catalytic chemical vapor deposition (CCVD) method. The physicochemical properties and Oxygen reduction reaction (ORR) ) Performance has been studied. The results show that carbon nanofibers are dispersed more evenly on carbon paper, in which carbon nanofibers have a narrow diameter distribution. The prepared CNF / CP composites have larger specific surface area and unique mesoporous structure. Compared with carbon paper, CNF / CP composites have a higher ratio of carbon atoms on the surface and carbon on the surface. In addition, CNF / CP also has a high ORR reactivity, and its ORR is a 2-electron reaction. The reason can be attributed to the unique microstructure of nanocarbon fibers. At the same time, CNF / CP also has higher exchange current density and more balanced voltage.