Visualization of Electrolytic Reactions at a Plasma-Liquid Interface

Author

Rumbach, Paul ; Griggs, Nathaniel ; Sankaran, R. Mohan ; Go, David B.

Author_Institution

Dept. of Aerosp. & Mech. Eng., Univ. of Notre Dame, Notre Dame, IN, USA

Volume

42

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

2610

Lastpage

2611

Abstract

A dc microplasma jet in flowing argon (Ar) gas is used to electrolyte aqueous sodium chloride (NaCl) solutions. Electrolytic reactions at the plasma-liquid interface make the solution more basic and result in H₂ gas evolution. The pH change is visualized using a pH sensitive dye, which becomes dark green under basic conditions. The basic solution created at the plasma-liquid interface is subsequently transported to the bottom of the reactor vessel by an apparent electrohydrodynamic flow.

Keywords

argon; electrolysis; hydrogen; pH; plasma chemistry; plasma jets; Ar; H₂; H₂ gas evolution; argon gas; dc microplasma jet; electrohydrodynamic flow; electrolytic reactions; electrolyze aqueous sodium chloride solutions; pH sensitive dye; plasma-liquid interface; Argon; Cathodes; Electrohydrodynamics; Inductors; Liquids; Plasmas; Visualization; Atmospheric-pressure plasmas; pH measurements; plasma chemistry; plasma materials processing; plasma materials processing.;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2014.2322976

Filename

6823181