Constructing ultrafine Pt nanoparticles anchored on N-doped porous carbon nanofibers for efficient and stable oxygen reduction reaction

Synthesis of ultrafine Pt nanoparticles with high metal utilization is essential to achieve efficient oxygen reduction reaction (ORR) a low mass loading Pt; however, it remains challenging. Here, we propose facile yet robust strategy construct (∼3 nm) anchored on porous carbon nanofibers (PCNFs) via electrospinning. It found that the architecture facilitates transport and active sites exposure, thereby providing highly accessible sites. As result, synthesized Pt@PCNFs (4.2 wt%) display excellent ORR activity 41 51 A gPt−1 at 0.9 V in alkaline acidic electrolytes, 8 times 10 corresponding value for commercial Pt/C catalyst, respectively. More importantly, strong metal-support interaction between N-doped nanofibers, as well shell protection, significantly enhances stability by suppressing aggregation during ORR, consequently much superior benchmark both acid media different temperatures. This work provides approach developing stable low-Pt-based electrocatalysts toward ORR.