The challenge in electrochemically cleaving the O=O bond lies in its formidable bond energy of 498 kJ mol -1 . Consequently, reactions at the cathode side of fuel cells are hampered compared to the anodic oxidation of hydrogen. . g-C₃N₄ quantum dots (QDs) serve as promising electrocatalysts to address some of the aforementioned challenges due to their high surface area, abundance of active sites, and short diffusion pathways for electrons and electrolyte/ions. These attributes enhance their catalytic performance for the oxygen reduction reaction, outperforming traditional catalysts (Table ). Like many other nanomaterials, there are two celebrated routes for synthesising g-C3N4 QDs: bottom-up and top-down. The former synthesises QDs from carbon and nitrogen sources, while the latter cleaves bulk g-C3N4 into QDs by hot-tailoring methods, solvothermal, sonication, etc. For example, showing liquid exfoliation of bulk g-C3N4 in water gave blue emitting QDs having a band gap of 2.7 eV while many other similar methods provide interesting band gap variations based on their size, absorption, emission and excitation wavelength as shown in Table-S1. However, these procedures suffer from high temperatures, affecting the material's surface structure adversely and also consumes prolonged reaction time. Of various available state-of-the-art techniques, the widely employed methods for carbon nitride quantum dots synthesis include microwave, chemical vapour deposition and electrosynthesis. Although microwave-assisted methods require less time and uniform particle size, they require an expensive microwave reactor and are unscalable. There are few reports for synthesising carbon nitride quantum dots using chemical vapour deposition. Recently, An et al. synthesised a heterostructure carbon nitride quantum dots on TiO2 Nanoarray . However, this process is expensive and pure carbon nitride quantum dots without any heterojunction have not been reported. Furthermore, the electrosynthesis of g-C3N4 QDs is rapid and can be performed at room temperature thereby alleviating the above limitations and more importantly, the electrosynthesis process can be tailored to control the size, morphology, and surface properties of the QDs especially if carried out under potentiostatic conditions. Table , which shows the comparison of electrochemical methods with other methods, as listed in the supplementary data.