Characterization of Atmospheric-Pressure DC-Glow Discharge in Contact with Liquid with a Miniature Argon Flow

Atmospheric pressure dc glow discharges in contact with liquid with a miniature argon flow were created between a needle cathode and an electrolyte anode (NaCl solution) in the open air. The effect of argon flow in stabilizing the obtained discharge was explored. Electric characterization of the discharge was studied for electrode separation range from 1 to 12 mm at atmospheric pressure. The electrical characterization of the discharge revealed that the obtained Paschen curve showed a bi-straight line for the relation between the gas breakdown voltage and the product of the gas pressure p with the electrode separation distance d. The current-voltage characteristics of the discharge revealed that the discharge was operated in the normal glow mode. Optical characterization of the discharge showed that the discharge was strongly non-equilibrium, which is suitable for electrochemistry applications such as synthesizing magnetic nanoparticles from the iron electrode. Proposed chemical reaction routes for different electrochemical applications of DC glow discharge in contact with the liquid electrode were discussed.