Abstract
Enhancing the activity of Co‐based electrocatalysts can be generally achieved by increasing the active center conductivity even fabricating hybrid materials for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) process. Herein, we developed a bifunctional oxygen electrocatalyst for Zn-air batteries (ZABs). The Ce-doped Co3O4 nanoparticles embedded on carbon nanofibers complex catalyst (Ce@Co3O4/CNFs) was synthesized via the incorporation of the electrospinning technology and in-situ growth process. The Ce@Co3O4/CNFs exhibited the comparable performance to Pt/C and RuO2 in the alkaline environment with a half-wave potential of 0.810 V and overpotential of 380 mV(@ 10 mA cm−2) for the ORR and OER, respectively. Moreover, an all-solid-state rechargeable ZABs with Ce@Co3O4/CNFs cathode was also assembled, which shows a relatively narrow discharge-charge voltage gap and a good cycle performance. These results provide a novel approach in developing Co-based dual functional electrocatalysts to enable the energy applications.
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