A pH-Universal Hollow-Mn3O4/MWCNT/Nafion™ Modified Glassy Carbon Electrode for Electrochemical Oxygen Reduction

Hollow Mn3O4 nanoparticles (diameter=31 nm, cavity diameter=16 nm, and shell thickness=7 nm) were attached to the surface of multiwall carbon nanotubes (MWCNT). A suspension of hollow Mn3O4/MWCNT with Nafion (TM) was dropcast onto a glassy carbon electrode, and the electrochemical reduction of oxygen in aqueous solution was investigated with this electrode. We assess the role of MWCNT, hollow Mn3O4, and Nafion (TM) in the performance of the electrode, and investigate the kinetics of the oxygen reduction reaction. The electrode exhibits outstanding performance in measures of cathodic current density and onset potential, and performed similarly well in acidic, neutral, and alkaline conditions.

Automated summary

In this study, hollow Mn3O4 nanoparticles were attached to multiwall carbon nanotubes to create a high-performance glassy carbon electrode for the electrochemical reduction of oxygen in aqueous solution. The electrode demonstrated outstanding cathodic current density and onset potential, performing well in acidic, neutral, and alkaline conditions.