The sloped limiting current region during ion transfer at arrays of nanointerfaces between immiscible electrolyte solutions
Rimboud, Mickaël, Austen, Benjamin J.J., Strutwolf, Jörg, Liu, Yang, and Arrigan, Damien W.M. (2024) The sloped limiting current region during ion transfer at arrays of nanointerfaces between immiscible electrolyte solutions. Journal of Electroanalytical Chemistry, 957. 118105.
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Abstract
The formation of arrays of nano-interfaces between immiscible electrolyte solutions using nanoporous membranes opens up new opportunities in electrochemical analysis. However, an unusual feature in the voltammetry, in the form of a consistently sloped current in the limiting current region, has been observed. This sloped limiting current was observed using different alkylammonium cation transfers at the nanoITIES arrays, showing the generality of the feature. Experiments with variable concentrations of organic or aqueous phase electrolytes revealed that the sloped limiting current was impacted by the concentration of the aqueous phase electrolyte. A plausible explanation for the effect is discussed based on ternary electrodiffusion which occurs due to facilitated ion transfer of the aqueous phase background electrolyte cation. As a result, the use of nanoITIES arrays as the basis for chemical sensors and detection needs to be carefully considered.
| Item ID: | 82493 |
|---|---|
| Item Type: | Article (Research - C1) |
| ISSN: | 1873-2569 |
| Keywords: | Interface, ITIES, Nanopore, Array, Voltammetry, Ternary electrodiffusion |
| Copyright Information: | © 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Date Deposited: | 19 Mar 2024 05:32 |
| FoR Codes: | 34 CHEMICAL SCIENCES > 3401 Analytical chemistry > 340103 Electroanalytical chemistry @ 30% 34 CHEMICAL SCIENCES > 3406 Physical chemistry > 340604 Electrochemistry @ 70% |
| SEO Codes: | 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences @ 100% |
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