Highly active electrocatalyst for oxygen reduction reaction from pyrolyzing carbon-supported iron tetraethylenepentamine complex

- Tetraethylenepentamine, a low-cost N5 ligand, used as the nitrogen precursor.
- Pyrolyzing FeN5 non-macrocycle complex on carbon as oxygen reduction catalyst.
- FeTEPA/C shows higher catalytic activity than Pt/C in alkaline and acid media.
- The ORR on FeTEPA/C follows a four-electron pathway among the studied potential.