In this study, we report the application of an inexpensive and easily prepared lead oxide-manganese oxide catalyst combined with Nafion (designated as Nf/PbMnOx) as a highly efficient air-cathode for a zinc-air battery. We verify the mechanistic study of the reduction of O2 for Nf/PbMnOx in alkaline aqueous solution using rotating ring/disk electrode voltammetry, and also an electrochemical approach using a wall-jet screen-printed ring disk electrode. The presence of Nf/PbMnOx shows great catalytic activity for the disproportionation reaction of HO 2- to O2 and OH- with an overall 4e- reduction of O2 in the first reduction reaction. The 4e- reduction of O2 was eventually achieved at the Nf/PbMnOx through evidence from the slope of Koutecky-Levich plots. With these inherent features, we then fabricated the zinc-air battery with the Nf/PbMnOx catalyst and examine the performance for a practical application with air cathodes.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)