Scientific article
OA Policy
English

A Solid‐State Reference Electrode Based on a Self‐Referencing Pulstrode

Published inAngewandte Chemie: International Edition, vol. 59, no. 6, p. 2294-2298
Publication date2020
Abstract

The design of solid‐state reference electrodes without a liquid junction is important to allow miniature and cost‐effective electrochemical sensors. To address this, a pulse control is proposed using an Ag/AgI element as reliable solid‐state reference electrode. It involves the local release of iodide by a cathodic current that is immediately followed by an electromotive force (EMF) measurement that serves as the reference potential. The recapture of iodide ions is achieved by potentiostatic control. This results in intermittent potential values that are reproducible to less than one millivolt (SD=0.27 mV, n =50). The ionic strength is shown to influence the activity coefficient of released iodide in accordance with the extended Debye–Hückel equation, resulting in a predictable change of the potential reading. The principle is applied to potentiometric potassium detection with a valinomycin‐based ion‐selective electrode (ISE), demonstrating a completely solid‐state sensor configuration.

Research groups
Funding
  • Swiss National Science Foundation - FN 200021_175622
  • Autre - National Natural Science Foundation of China (21874063)
Citation (ISO format)
GAO, Wenyue et al. A Solid‐State Reference Electrode Based on a Self‐Referencing Pulstrode. In: Angewandte Chemie: International Edition, 2020, vol. 59, n° 6, p. 2294–2298. doi: 10.1002/anie.201912651
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Article (Accepted version)
accessLevelPublic
Identifiers
Journal ISSN1433-7851
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Technical informations

Creation08/06/2020 10:36:00
First validation08/06/2020 10:36:00
Update time15/03/2023 22:03:47
Status update15/03/2023 22:03:47
Last indexation31/10/2024 18:50:13
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