PtCu anchored on N,S-codoped electrospinning porous carbon nanofibers for oxygen reduction reaction

A facile and general strategy for preparing carbon supports with ideal sintering resistance using electrospinning and sulfidation treatment is reported in this paper. The strong interaction between PtCu and N,S-codoped electrospinning porous carbon nanofibers can stabilize PtCu nanoparticles (NPs) below 4 nm to 800 °C. The as-prepared PtCu-800/NS-PCNFs exhibit superior catalytic performances for oxygen reduction reaction (ORR). The PtCu-800/NS-PCNFs presents the mass activity (MA) and specific activity (SA) of 0.4785 A mg−1 and 0.6343 mA cm−2, which is 3.1 times and 2.4 times that of commercial Pt/C. More important, the electrochemical surface area (ECSA) of PtCu-800/NS-PCNFs is 1.3 times larger than that of commercial Pt/C. Therefore, the improved ORR activity can be ascribed to the synergistic interaction between Pt and Cu and the uniform distribution of catalyst nanoparticles.