ZIF-67 derived Ag-Co3O4@N-doped carbon/carbon nanotubes composite and its application in Mg-air fuel cell

Ag-Co3O4@N-doped carbon/carbon nanotubes composites are synthesized by dispersing Ag nanoparticles throughout the N-doped carbon derived from ZIF-67/CNT. In oxygen reduction reaction (ORR), the synthesized composites possess a one-step 4 electron pathway, and a synergistic effect between Ag nanoparticles and N-doped carbon is proposed. In the Mg-air fuel cell, the synthesized composites show the highest power density of 88.9 mW/cm2 at current density of 140 mA/cm2, better than that of 20%Pt/C. This excellent performance ensures this composite a promising ORR catalyst for Mg-air fuel cell. Keywords: ZIF-67 derived, Synergistic effect, Oxygen reduction reaction, Mg-air fuel cell