Autor segons l'article: Baez JF, Compton M, Chahrati S, Cánovas R, Blondeau P, Andrade FJ
Departament: Química Analítica i Química Orgànica
Autor/s de la URV: Andrade, Francisco Javier / Blondeau, Pascal Jean Claude Leon
Codi de projecte: CTQ2016-77128-R
Paraules clau: Sodium Response mechanism Polyelectrolytes Platinum Ph Oxygen reduction reaction Monitoring glucose Mixed potential Hydrogen peroxide Cell Biosensors
Resum: The use of a Pt electrode coated with a layer of Nation has been described in previous works as an attractive way to perform the potentiometric detection of hydrogen peroxide. Despite of the attractive features of this approach, the nature of the non-Nernstian response of this system was not properly addressed. In this work, using a mixed potential model, the open circuit potential of the Pt electrode is shown to be under kinetic control of the oxygen reduction reaction (ORR). It is proposed that hydrogen peroxide acts as an oxygenated species that blocks free sites on the Pt surface, interfering with the ORR. Therefore, the effect of the polyelectrolyte coating can be understood in terms of the modulation of the factors that affects the kinetics of the ORR, such as an increase of the H + concentration, minimization of the effect of the spectator species, etc. Because of the complexity and the lack of models that accurately describe systems with practical applications, this work is not intended to provide a mechanistic but rather a phenomenological view on problem. A general framework to understand the factors that affect the potentiometric response is provided. Experimental evidence showing that the use of polyelectrolyte coatings are a powerful way to control the mixed potential open new ways for the development of robust and simple potentiometric sensors. (C) 2019 Elsevier B.V. All rights reserved.
Àrees temàtiques: Spectroscopy Química Odontología Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências General medicine Farmacia Environmental chemistry Engenharias iv Engenharias iii Engenharias ii Enfermagem Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, analytical Biotecnología Biodiversidade Biochemistry Astronomia / física Analytical chemistry
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 00032670
Adreça de correu electrònic de l'autor: pascal.blondeau@urv.cat franciscojavier.andrade@urv.cat
Identificador de l'autor: 0000-0003-1331-5055 0000-0003-1199-2837
Data d'alta del registre: 2023-02-18
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/abs/pii/S0003267019313625
Programa de finançament: Programa Estatal de Investigación, Desarrollo e Innovación Orientada a los Retos de la Sociedad (Agencia Estatal de Investigación - Ministerio de Economía, Industria y Competitividad)
Referència a l'article segons font original: Analytica Chimica Acta. 1097 204-213
Referència de l'ítem segons les normes APA: Baez JF, Compton M, Chahrati S, Cánovas R, Blondeau P, Andrade FJ (2020). Controlling the mixed potential of polyelectrolyte-coated platinum electrodes for the potentiometric detection of hydrogen peroxide. Analytica Chimica Acta, 1097(), 204-213. DOI: 10.1016/j.aca.2019.11.018
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Acrònim: HOMESENS
DOI de l'article: 10.1016/j.aca.2019.11.018
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2020
Acció del programa de finançament: Proyecto de I+D
Tipus de publicació: Journal Publications