| Carbon-supported manganese dioxide nanoparticles as an electrocatalyst for oxygen reduction reaction (ORR) in microbial fuel cells |
| Paper ID : 1629-UFGNSM-FULL |
| Authors: |
|
Fatemeh Shahbazi Farahani * 3rd floor, Morvarid tower, Madreseh Alley, Koohsar Avenue, Shahran, Tehran |
| Abstract: |
| Manganese dioxide (MnO2) catalyst were chemically deposited onto high speciļ¬c surface area nitrogen-doped Carbon Vulcan. N-doped carbon Vulcan/MnO2 nanomaterial have been synthesized via a facile solvent-free method. The N-doped carbon Vulcan/MnO2 electrocatalyst were characterized using X-ray diffractometer (XRD) and Field Emission Scanning Electron Microscope (FESEM). The N-doped carbon Vulcan/MnO2 catalytic activity were evaluated using a rotating disk electrode and cyclic voltametery and found to be promising as alternative, non-platinised, catalysts for the oxygen reduction reaction (ORR) in neutral pH solution. The catalyst showed a distinct oxygen reduction peak near 0.25 V. The shift of the oxygen reduction peak towards a less negative potential is attributed to a decrease in the overpotential, which improves the ORR activity of catalyst. As such it was considered suitable as cathode material for microbial fuel cells (MFCs). Thus This catalyst orientated the ORR mechanism towards the 4-electron reduction, yielding less peroxide as an intermediate, demonstrating a good electrochemical performance in terms of voltage and power density |
| Keywords: |
| microbial fuel cell, oxygen reduction reaction, MnO2, carbon vulcan |
| Status : Paper Accepted (Oral Presentation) |
