Capacitance of the interface between two immiscible electrolyte solutions - A controversial issue
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00549372" target="_blank" >RIV/61388955:_____/22:00549372 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0325384" target="_blank" >http://hdl.handle.net/11104/0325384</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.electacta.2021.139720" target="_blank" >10.1016/j.electacta.2021.139720</a>
Alternative languages
Result language
angličtina
Original language name
Capacitance of the interface between two immiscible electrolyte solutions - A controversial issue
Original language description
Electrochemical impedance spectroscopy is used to evaluate the capacitance of the polarizable interface between a solution of LiCl + HCl in water and a solution of bis(triphenylphospho-ranylidene)ammonium tetrakis(pentafluorophenyl)borate in 1,2-dichloroethane (DCE).nnA significant effect of both the interfacial potential difference and the electrolyte concentration on the capacitance is observed using two different experimental arrangements. The former effect is supported by an independent evaluation of the capacitance as the second derivative of the interfacial tension vs. the potential difference plot. It is shown that the experimental data can be reproduced relatively well by means of the Gouy-Chapman theory and the modified Verwey-Niessen model of the electric double layer consisting of two back-to-back space charge regions separated by an inner layer of the solvent molecules. However, the effect of the electrolyte concentration points to an easy penetration of ions into the inner layer leading to its negative contribution to the inverse capacitance. These conclusions are at variance with those made recently on the basis of the impedance measurements at the micro-hole supported water/DCE interface. A tentative explanation is proposed, which refers to the possible absence of the direct control of the active area of the liquid/liquid interface shape and position in the micro-hole over a broad range of the potential differences.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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
<a href="/en/project/GA20-01589S" target="_blank" >GA20-01589S: New strategies for improving sensing properties of novel electrode materials via their surface pretreatment or modification</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Electrochimica acta
ISSN
0013-4686
e-ISSN
1873-3859
Volume of the periodical
403
Issue of the periodical within the volume
JAN 2022
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
139720
UT code for WoS article
000776113700010
EID of the result in the Scopus database
2-s2.0-85121256921