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 degrees 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.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.