Ultralong nitrogen/sulfur Co?doped carbon nano?hollow?sphere chains with encapsulated cobalt nanoparticles for highly efficient oxygen electrocatalysis

The development of simple and effective strategies to prepare electrocatalysts, which possess unique stable structures comprised metal/nonmetallic atoms for oxygen reduction reaction (ORR) evolution (OER), is currently an urgent issue. Herein, efficient bifunctional electrocatalyst featured by ultralong N, S-doped carbon nano-hollow-sphere chains about 1300 nm with encapsulated Co nanoparticles (Co-CNHSCs) developed. multifunctional catalytic properties together the heteroatom-induced charge redistribution (i.e., modulating electronic structure active site) result in superior activities toward OER ORR alkaline media. optimized catalyst Co-CNHSC-3 displays outstanding electrocatalytic ability OER, a high specific capacity 1023.6 mAh gZn?1, excellent reversibility after 80 h at 10 mA cm?2 Zn-air battery system. This work presents new strategy design synthesis carbon-based catalysts energy storage conversion devices.