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Rodrigues MP, Dourado AH, Krischer K, Torresi SIC. Gold–rhodium nanoflowers for the plasmon enhanced ethanol electrooxidation under visible light for tuning the activity and selectivity. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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How to Improve the Performance of Electrochemical Sensors via Minimization of Electrode Passivation. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9010012] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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 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.
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Dourado AH, De Angelis LD, Arenz M, Córdoba de Torresi SI. L-cysteine oxidation on Pt and Au rotating disk electrodes: Insights on mixed controlled kinetics. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114920] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Dourado AHB, Arenz M, Córdoba de Torresi SI. Mechanism of Electrochemical L‐Cysteine Oxidation on Pt. ChemElectroChem 2019. [DOI: 10.1002/celc.201801575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- André H. B. Dourado
- Instituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
| | - Matthias Arenz
- Chemistry departamentKøbenhavn Universitet Universistetsparken 5 2100 Copenhagen, Denmark
- Present address: Department of Chemistry and BiochemistryUniversität Bern Freiestrasse 3 CH – 3012 Bern Switzerland
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