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Keywords = novel electrode materials resistant to passivation

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15 pages, 300 KiB  
Review
How to Improve the Performance of Electrochemical Sensors via Minimization of Electrode Passivation
by Jiri Barek
Chemosensors 2021, 9(1), 12; https://doi.org/10.3390/chemosensors9010012 - 6 Jan 2021
Cited by 43 | Viewed by 6251
Abstract
It follows from critical evaluation of possibilities and limitations of modern voltammetric/amperometric methods that one of the biggest obstacles in their practical applications in real sample analysis is connected with electrode passivation/fouling by electrode reaction products and/or matrix components. This review summarizes possibilities [...] Read more.
It follows from critical evaluation of possibilities and limitations of modern voltammetric/amperometric methods that one of the biggest obstacles in their practical applications in real sample analysis is connected with electrode passivation/fouling by electrode reaction products and/or matrix components. This review summarizes possibilities how to minimise these problems in the field of detection of small organic molecules and critically compares their potential and acceptability in practical laboratories. Attention is focused on simple and fast electrode surface renewal, the use of disposable electrodes just for one and/or few measurements, surface modification minimising electrode fouling, measuring in flowing systems, application of rotating disc electrode, the use of novel separation methods preventing access of passivating particles to electrode surface and the novel electrode materials more resistant toward passivation. An attempt is made to predict further development in this field and to stress the need for more systematic and less random research resulting in new measuring protocols less amenable to complications connected with electrode passivation. Full article
(This article belongs to the Special Issue Feature Papers- Electrochemical Devices and Sensors)
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