There are many types of cathodic oxygen reduction catalysts for proton exchange membrane fuel cell (PEMFC). Among them, Pt-based catalysts are most likely to be industrialized because of their incomparable high activity. However, most of the Pt-based catalysts have not reached the maximum activity and stability. Herein, porous carbon nanofibers (p-CNF) with self-nitrogen-doped as catalyst supports were successfully prepared by the method of electrospinning. After functionalization, the functionalized porous carbon nanofibers (f-p-CNF) were loaded with PtPd alloy nanoparticles to obtain the catalyst (Pt_0.66Pd_0.33/f-p-CNF), which has excellent electrochemical performance. Its specific activities (SA) and Pt mass activities (Pt MA) are 1.73 and 1.86 times of the commercial JM 20% Pt/C (JM20), respectively. The results can be attributed to the porous structure of nanofibers, which not only facilitate the transmission of gas-liquid and electron but also increase the exposure of active sites. And the doped nitrogen of fibers may regulate the electronic structure of the metal active substance to increase the activity. This work provides catalyst with novel structure which could enable PEMFCs to be more efficient in operation.

用于质子交换膜燃料电池（PEMFC）的阴极氧还原催化剂的类型很多。其中，基于Pt的催化剂由于其无与伦比的高活性而最有可能被工业化。但是，大多数基于Pt的催化剂尚未达到最大活性和稳定性。在此，通过电纺丝法成功地制备了自掺杂氮的多孔碳纳米纤维（p-CNF）作为催化剂载体。功能化后，在功能化的多孔碳纳米纤维（fp-CNF）上负载PtPd合金纳米颗粒，以获得催化剂（Pt _0.66 Pd _0.33/ fp-CNF），具有出色的电化学性能。其比活（SA）和Pt质量活度（Pt MA）分别是商品JM 20％Pt / C（JM20）的1.73倍和1.86倍。结果可以归因于纳米纤维的多孔结构，其不仅促进了气液和电子的传输，而且增加了活性位点的暴露。并且纤维中的掺杂氮可以调节金属活性物质的电子结构以增加活性。这项工作为催化剂提供了新颖的结构，可以使PEMFC的运行效率更高。