Articles producció científica> Química Analítica i Química Orgànica

Controlling the mixed potential of polyelectrolyte-coated platinum electrodes for the potentiometric detection of hydrogen peroxide

  • Identification data

    Identifier: imarina:6021087
    Authors:
    Baez JF, Compton M, Chahrati S, Cánovas R, Blondeau P, Andrade FJ
    Abstract:
    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.
  • Others:

    Author, as appears in the article.: Baez JF, Compton M, Chahrati S, Cánovas R, Blondeau P, Andrade FJ
    Department: Química Analítica i Química Orgànica
    URV's Author/s: Andrade, Francisco Javier / Blondeau, Pascal Jean Claude Leon
    Project code: CTQ2016-77128-R
    Keywords: Sodium Response mechanism Polyelectrolytes Platinum Ph Oxygen reduction reaction Monitoring glucose Mixed potential Hydrogen peroxide Cell Biosensors
    Abstract: 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.
    Thematic Areas: 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
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 00032670
    Author's mail: pascal.blondeau@urv.cat franciscojavier.andrade@urv.cat
    Author identifier: 0000-0003-1331-5055 0000-0003-1199-2837
    Record's date: 2023-02-18
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0003267019313625
    Funding program: Programa Estatal de Investigación, Desarrollo e Innovación Orientada a los Retos de la Sociedad (Agencia Estatal de Investigación - Ministerio de Economía, Industria y Competitividad)
    Papper original source: Analytica Chimica Acta. 1097 204-213
    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
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Acronym: HOMESENS
    Article's DOI: 10.1016/j.aca.2019.11.018
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2020
    Funding program action: Proyecto de I+D
    Publication Type: Journal Publications
  • Keywords:

    Analytical Chemistry,Biochemistry,Chemistry, Analytical,Environmental Chemistry,Spectroscopy
    Sodium
    Response mechanism
    Polyelectrolytes
    Platinum
    Ph
    Oxygen reduction reaction
    Monitoring glucose
    Mixed potential
    Hydrogen peroxide
    Cell
    Biosensors
    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
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