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Enhanced Potentiometric Detection of Hydrogen Peroxide Using a Platinum Electrode Coated with Nafion

  • Dades identificatives

    Identificador: imarina:5131270
    Autors:
    Parrilla MCánovas RAndrade FJ
    Resum:
    The potentiometric response to hydrogen peroxide of a platinum electrode coated with a layer of Nafion is presented. The results show that the Nafion membrane acts as an effective permselective barrier, thus significantly reducing the response to some redox active species, such as ascorbate. Even more interesting, these coated electrodes show a significantly enhanced sensitivity to hydrogen peroxide (H2O2) when the measurements are performed in solutions of high ionic strength. The influence of pH, ionic strength and supporting electrolyte on this enhancement are presented. Under optimized conditions these coated electrodes show a linear dependence with the logarithm of the concentration of H2O2, with sensitivities of −125.1±5.9 mV decade−1 (several times higher than the bare electrodes) and a linear range that spans from 10−5 M to 10−3 M of H2O2. Preliminary studies suggest that the coupling between the redox potential on the Pt electrode and the Donnan potential of the membrane plays a role on this enhancement. Considering this improved sensitivity, selectivity, stability and linear ranges, this system shows promise as a future platform to build enzyme-based potentiometric biosensors.
  • Altres:

    Autor segons l'article: Parrilla M; Cánovas R; Andrade FJ
    Departament: Química Analítica i Química Orgànica
    e-ISSN: 1521-4109
    Autor/s de la URV: Andrade, Francisco Javier
    Paraules clau: Potentiometric sensors Nafion ion-exchange membrane Hydrogen peroxide Donnan potential
    Resum: The potentiometric response to hydrogen peroxide of a platinum electrode coated with a layer of Nafion is presented. The results show that the Nafion membrane acts as an effective permselective barrier, thus significantly reducing the response to some redox active species, such as ascorbate. Even more interesting, these coated electrodes show a significantly enhanced sensitivity to hydrogen peroxide (H2O2) when the measurements are performed in solutions of high ionic strength. The influence of pH, ionic strength and supporting electrolyte on this enhancement are presented. Under optimized conditions these coated electrodes show a linear dependence with the logarithm of the concentration of H2O2, with sensitivities of −125.1±5.9 mV decade−1 (several times higher than the bare electrodes) and a linear range that spans from 10−5 M to 10−3 M of H2O2. Preliminary studies suggest that the coupling between the redox potential on the Pt electrode and the Donnan potential of the membrane plays a role on this enhancement. Considering this improved sensitivity, selectivity, stability and linear ranges, this system shows promise as a future platform to build enzyme-based potentiometric biosensors.
    Àrees temàtiques: Saúde coletiva Química Psicología Medicina ii Medicina i Materiais Interdisciplinar Geociências Farmacia Engenharias iii Engenharias ii Electrochemistry Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, analytical Biotecnología Biodiversidade Astronomia / física Analytical chemistry
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: franciscojavier.andrade@urv.cat
    Identificador de l'autor: 0000-0003-1199-2837
    Data d'alta del registre: 2024-09-07
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    Enllaç font original: https://onlinelibrary.wiley.com/doi/abs/10.1002/elan.201600403
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Electroanalysis. 29 (1): 223-230
    Referència de l'ítem segons les normes APA: Parrilla M; Cánovas R; Andrade FJ (2017). Enhanced Potentiometric Detection of Hydrogen Peroxide Using a Platinum Electrode Coated with Nafion. Electroanalysis, 29(1), 223-230. DOI: 10.1002/elan.201600403
    DOI de l'article: 10.1002/elan.201600403
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2017
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Analytical Chemistry,Chemistry, Analytical,Electrochemistry
    Potentiometric sensors
    Nafion ion-exchange membrane
    Hydrogen peroxide
    Donnan potential
    Saúde coletiva
    Química
    Psicología
    Medicina ii
    Medicina i
    Materiais
    Interdisciplinar
    Geociências
    Farmacia
    Engenharias iii
    Engenharias ii
    Electrochemistry
    Ciências biológicas ii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Chemistry, analytical
    Biotecnología
    Biodiversidade
    Astronomia / física
    Analytical chemistry
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