However, FT-IR shows the bonding to different functional groups, confirming the presence of carbon, nitrogen, and oxygen in the system. Although the mechanism of QDs formation is unclear, the polyaddition of melamine to a two-dimensional structure and its subsequent exfoliation in IL induced by the electric field is envisaged, resulting in finite-sized QDs. Indeed, an accurate control of the electric field under potentiostatic conditions can result in different sizes of g-C3N4 QDs in monodispersed conditions. Furthermore, we can observe in the TEM that the QDs tend to get bigger as the potential difference increases. As a result, the emission wavelength becomes longer, indicating the increase in the band gap of these 0 D nanomaterials. nitrogen present likely introduces defects that enhance the oxygen reduction reaction. In this study, the increase in size observed when the potential is shifted from -1.5 V to -3 V improves ORR performance, likely due to the nature of the ions intercalated, as confirmed by mass spectrometry. A more negative potential will tend to intercalate more cations within the moiety of Quantum Dots. In addition, a smaller surface area leads to one electron pathway in the case of an 8.7 nm carbon nitride quantum dot. However, the 2.5 nm carbon nitride quantum dot prefers a two-electron pathway due to a larger surface area, and the 4.1 nm undergoes fourelectron pathways due to the presence of imidazolium cations, improving the ORR performance.