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Optimal Thickness of a Porous Micro-Electrode Operating a Single Redox Reaction

dc.contributor.authorLE, Tien
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorZHANG, Lin
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorRECULUSA, Stephane
hal.structure.identifierLaboratoire des Composites Thermostructuraux [LCTS]
dc.contributor.authorVIGNOLES, Gérard
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorMANO, Nicolas
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorKUHN, Alexander
dc.contributor.authorLASSEUX, Didier
dc.date.accessioned2021-05-14T09:39:29Z
dc.date.available2021-05-14T09:39:29Z
dc.date.issued2019-08-27
dc.identifier.issn2196-0216
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/76497
dc.description.abstractEnThis article reports on a procedure to predict the optimal thickness of cylindrical porous electrodes operating a single redox reaction. This is obtained from a macroscopic model for the coupled diffusion-reaction process that is first validated with voltammetry experiments of H 2 O 2 /H 2 O reduction reaction carried out with a series of porous electrodes elaborated in this work. An analytical solution to this model is developed in the steady regime and for electrodes featuring a thickness to mean radius ratio small enough compared to unity. An analytical expression of the optimal electrode thickness is derived corresponding to the crossover value of two asymptotic regimes characterizing the dependence of the volume current density produced by the electrode upon its thickness. The predictive tool of the optimal thickness is general, regardless the porous microsc-tructure. The case of the electrodes used in the reported experiments illustrates that the optimal thickness is not intrinsic to the microsctructure characterized by the size of the representative volume, its specific area and effective diffusion coefficient. It also depends on the operating conditions reflected in the kinetic number, Ki, and the thickness of the diffusion layer surrounding the electrode. The dependence of the optimal thickness on these two parameters is quite significant in a range of very small values of Ki but remains quasi constant beyond
dc.description.sponsorshipAdvanced Materials by Design - ANR-10-LABX-0042
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.description.sponsorshipModélisation d'électrodes poreuses pour leur conception optimisée - ANR-17-CE08-0005
dc.description.sponsorshipElectrodes poreuses biocompatibles et biofonctionnelles pour des biopiles enzymatiques miniaturisées
dc.language.isoen
dc.publisherWeinheim : Wiley-VCH
dc.subject.encomputational chemistry, optimization, porous electrodes, redox chemistry, volume averaging method
dc.title.enOptimal Thickness of a Porous Micro-Electrode Operating a Single Redox Reaction
dc.typeArticle de revue
dc.identifier.doi10.1002/celc.201800972
dc.subject.halSciences de l'ingénieur [physics]/Milieux fluides et réactifs
bordeaux.journalChemElectroChem
bordeaux.page173-180
bordeaux.volume6
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.issue1
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-02367334
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02367334v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ChemElectroChem&rft.date=2019-08-27&rft.volume=6&rft.issue=1&rft.spage=173-180&rft.epage=173-180&rft.eissn=2196-0216&rft.issn=2196-0216&rft.au=LE,%20Tien&ZHANG,%20Lin&RECULUSA,%20Stephane&VIGNOLES,%20G%C3%A9rard&MANO,%20Nicolas&rft.genre=article


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