Operating mechanism of the electrolyte cathode atmospheric glow discharge

T. Cserfalvi, P. Mezei

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

Cathode fall (Ucf), cathodic current density and atomic emission intensities originating from metal salts in the electrolyte cathode were measured as a function of different discharge parameters. Emission intensities in function of cathode fall indicate a potential barrier in the sputtered mass flux. This means that the primary particles of the cathode sputtering are of positive charge and the cathode fall including its internal variables is the most important factor. The measured current density and the Ucf as a function of pressure are in accordance with the low pressure data in the literature. The observed decrease of the Ucf with decreasing pH was explained by a model in that the secondary electron emission coefficient of the cathode (γ) is controlled through a reaction net of competing reactions of different electron scavengers involving the hydroxonium ions of the cathode solution. The model revealed two different electron emission processes of the electrolyte cathode, an emission coupled with hydrated electrons is dominating below pH 2.5 while a proton-independent emission of poor efficiency is working above pH 3. Our model fits to the reported yields of the ultimate products both in the solution and in the gas phase and offers a calculation of γ and Ucf in the function of the cathode acidity. The model provides two other independent γ calculation methods based on product analysis data.

Original languageEnglish
Pages (from-to)813-819
Number of pages7
JournalFresenius' journal of analytical chemistry
Volume355
Issue number7-8
Publication statusPublished - 1996

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Glow discharges
Electrolytes
Electrodes
Cathodes
Electrons
Electron emission
Current density
Pressure
Acidity
Sputtering
Protons
Mass transfer
Salts
Gases
Metals
Ions

ASJC Scopus subject areas

  • Biochemistry

Cite this

Operating mechanism of the electrolyte cathode atmospheric glow discharge. / Cserfalvi, T.; Mezei, P.

In: Fresenius' journal of analytical chemistry, Vol. 355, No. 7-8, 1996, p. 813-819.

Research output: Contribution to journalArticle

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