Interfacial instability associated with the transfer of non-adsorbing ions across the polarized water/1,2-dichloroethane interface
Result description
Polarography with the electrolyte dropping electrode is used to study the transfer of several non-adsorbing ions including Na+, H+, Cl-, tetrabutylammonium+ (TBA+) and tetraethylammonium+ (TEA+) across the water/1,2-dichloroethane interface. The transfer of Na+, H+, Cl- and TBA+ in the thermodynamically favored direction is accompanied by the interfacial instability, which is manifested by the substantial faradaic current amplification (polarographic current maximum). No such amplification is observed in case of the transfer of TEA+ in either direction. The potential range of the interfacial instability, as well as of its absence, is correctly predicted by the linear instability analysis developed by Aogaki et al. (Electrochim. Acta 23 (1978) 867). The analysis also provides an explanation for the experimentally observed decrease of the interfacial tension in the potential range of the instability. Two remarkable effects of the interfacial instability are demonstrated, specifically the irregularly repeated swapping of the faradaic current and the interfacial tension occurring close to the electrocapillary maximum between the amplified current/low interfacial tension and diffusion current/high interfacial tension levels, and the mechanical oscillation of the electrolyte drop in the former state.
Keywords
Water/1,2-dichloroethane interfaceMechanical oscillationsIon transfer
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Interfacial instability associated with the transfer of non-adsorbing ions across the polarized water/1,2-dichloroethane interface
Original language description
Polarography with the electrolyte dropping electrode is used to study the transfer of several non-adsorbing ions including Na+, H+, Cl-, tetrabutylammonium+ (TBA+) and tetraethylammonium+ (TEA+) across the water/1,2-dichloroethane interface. The transfer of Na+, H+, Cl- and TBA+ in the thermodynamically favored direction is accompanied by the interfacial instability, which is manifested by the substantial faradaic current amplification (polarographic current maximum). No such amplification is observed in case of the transfer of TEA+ in either direction. The potential range of the interfacial instability, as well as of its absence, is correctly predicted by the linear instability analysis developed by Aogaki et al. (Electrochim. Acta 23 (1978) 867). The analysis also provides an explanation for the experimentally observed decrease of the interfacial tension in the potential range of the instability. Two remarkable effects of the interfacial instability are demonstrated, specifically the irregularly repeated swapping of the faradaic current and the interfacial tension occurring close to the electrocapillary maximum between the amplified current/low interfacial tension and diffusion current/high interfacial tension levels, and the mechanical oscillation of the electrolyte drop in the former state.
Czech name
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Czech description
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Classification
Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Electroanalytical Chemistry
ISSN
1572-6657
e-ISSN
—
Volume of the periodical
819
Issue of the periodical within the volume
JUN 2018
Country of publishing house
CH - SWITZERLAND
Number of pages
6
Pages from-to
95-100
UT code for WoS article
000435619700013
EID of the result in the Scopus database
2-s2.0-85029420128
Basic information
Result type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
OECD FORD
Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Year of implementation
2018