Rational design of low-cost, highly electrocatalytic activity, and stable bifunctional
electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER)
has been a great significant for metal–air batteries. Herein, an efficient bifunctional
electrocatalyst based on hollow cobalt oxide nanoparticles embedded in nitrogen-doped
carbon nanosheets (Co/N-Pg) is fabricated for Zn–air batteries. A low-cost biomass peach
gum, consisting of carbon, oxygen, and hydrogen without other heteroatoms, was used as …