Effect of the discharge-gap distance on the formation of hydrogen peroxide in a plasma-solution system with atmospheric-pressure glow discharge

The accumulation of hydrogen peroxide in an inert electrolyte solution (Na2SO4) under the action of an atmospheric-pressure glow discharge was studied. The amounts of OH radicals and hydrogen peroxide transferred from the solution to gas phase were estimated. The H2O2 yield was shown to decrease with increasing the interelectrode distance due to the growth of hydrogen-peroxide transfer to the gas phase under the action of the ion bombardment of the solution surface.