Previous studies have symbolized Pt-based catalysts are the most efficient for the ORR process, while the Ir-or Ru-based catalysts, for the OER, show promising catalytic activity. However, the mentioned catalysts before contains the noble metals so that the expensive cost is a fundamental obstacle for their large-scale practical application . In this scenario, developing the cost-effective or even bifunctional electrocatalysts for both ORR and OER with industrially relevant activity is highly desired for metal-air batteries at the current stage.