Boric Acid‐Assisted Pyrolysis for High‐Loading Single‐Atom Catalysts to Boost Oxygen Reduction Reaction in Zn‐Air Batteries

The emerging of single‐atom catalysts (SACs) offers a great opportunity for the development advanced energy storage and conversion devices due to their excellent activity durability, but actual mass production high‐loading SACs is still challenging. Herein, facile green boron acid (H 3 BO )‐assisted pyrolysis strategy put forward synthesize by only using chitosan, cobalt salt H as precursor, effect deeply investigated. results show that molten oxide derived from ideal high‐temperature carbonization media blocking play important role in synthesis process. As result, acquired Co/N/B tri‐doped porous carbon framework (Co–N–B–C) not presents hierarchical structure, large specific surface area abundant edges also possesses single Co atom (4.2 wt. %), thus giving rise outstanding oxygen catalytic performance. When employed catalyst air cathode Zn‐air batteries, resultant Co–N–B–C shows remarkable power density long‐term stability. Clearly, our work gains deep insight into provides new avenue high‐performance SACs.