Electrochemical Synthesis of Diamond in Molten LiCl–KCl–K₂CO₃–KOH

We propose a novel diamond synthesis method based on molten salt electrolysis. In our method, carbon deposition and hydrogen generation occur simultaneously, reacts selectively with atoms that possess sp 2 hybrid orbitals to form CH 4 gas. Therefore, only 3 grows diamond. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, Raman spectroscopy analysis confirmed was synthesized by potentiostatic electrolysis at 1.1 V vs Li + /Li 10 C cm −2 charge density in LiCl–KCl–K CO –KOH 973 K.