C03O4 NPs Embedded in N-doped Carbon Fibers as a Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions

摘要

Oxygen reduction and evolution reactions are important and major challenges to Li-air batteries. In this report, a three-dimensional (3D) bifunctional electrocatalyst was prepared by embedding C03O4 nanoparticles into nitrogen-doped carbon nanofibers (denoted as C03O4-NCNF) by a facile method. The C03O4-NCNF possesses a high specific surface area(403.5 m~2/g) and porous structure. The Co3O4-NCNF exhibits an excellent catalytic activity and long-time durability for both oxygen reduction and evolution reactions in alkaline solutions.