中文摘要：

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。

英文摘要：

A carbon nanofiber/carbon paper （CNF/CP） composite was synthesized directly on CP by a catalytic chemical vapor-deposition method, and the physicochemical properties of and oxygen-reduction reaction （ORR） on this com- posite were investigated. Scanning electron microscopy shows that the CNFs are uniformly distributed on the CP, and high-resolution transmission electron microscopy results show that the CNFs have a narrow size distribution. The CNF/ CP composite has a large surface area, and its mesoporous character is confirmed by N2physisorption. Raman spectrum studies show that the CNF/CP composite has a high ratio of edge atoms to basal atoms compared with that of CP. From cyclic voltammetry studies, the CNF/CP composite was found to be more active than CP in terms of ORR, which may be due to the contribution from the CNFs. The CNF/CP composite shows a higher exchange current density and more positive equilibrium potential than CP, as verified by Tafel analysis. Moreover, linear-sweep voltammetry confirms that ORR on the CNF/CP composite is conducted through a two-electron reaction pathway.