Abstract
Using a thin platinum anode in contact with an electrolytic solution, normal electrolysis develops spontaneously to contact glow discharge electrolysis (CGDE) at sufficiently high voltage. During this transition, midpoint voltage (VD) is an important critical value. From VD on, plasma is sustained by direct current glow discharge between the electrode and the electrolyte surface. And H2O2 is the main non-faradaic yield. In this study, effects of conductivity on VD and the concentration of H2O2 have been investigated in Na2SO4 and NaCl solution. The results indicate that VD decreases with the increasing conductivity. And the value of VD and the concentration of H2O2 in NaCl solution are less than those in Na2SO4 solution. The concentration of H2O2 increases steadily and then decreases to maintain a stationary value.
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