To begin the electrosynthesis process, 2 mg/mL dispersion of black phosphorus and 20 µL/mL of Nafion™ is prepared in de-aerated ethanol. 80 µL of this solution is drop-coat on the surface of a 10×10×1 mm glassy carbon plate working electrode. This is repeated 3 times on each side of the electrode. Electrosynthesis is performed by applying constant potential of -2 V for 12 h, using an inert platinum mesh as the counter electrode and a silver wire as the quasi-reference electrode. The