Constructing Pt and Pt/MoC Co-Anchored on Nitrogen-Doped Carbon Toward Excellent Methanol-Resilient Oxygen Reduction Performance for Zinc-Air Batteries

Drastically lowering the usage of platinum while enhancing activity and stability toward oxygen reduction is critical to promoting energy conversion efficiency in metal-air batteries. Herein, an efficient oxygen reduction catalyst was rationally designed by constructing ultrasmall Pt and Pt/MoC dual active sites co-anchored on nitrogen-doped carbon. Owing to the synergistic effect of the dual active sites, the optimized Pt-MoC@NC delivers superior oxygen reduction activity with ultralow Pt loading. Especially, the Pt-MoC@NC shows robust methanol tolerance. As the cathodic catalyst, Pt-MoC@NC based zinc-air battery possesses outstanding performance with a large peak power density of 100 mW cm(-2) and long charge-discharge durability.