Quantification of charge carriers and acetate diffusion lengths in intermittent electro-active biofilms using Electrochemical Impedance Spectroscopy
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Metadatos
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INVESTIGACIONMetadatos
Título
Quantification of charge carriers and acetate diffusion lengths in intermittent electro-active biofilms using Electrochemical Impedance SpectroscopyAutoría
Fecha de publicación
2023-12-30Editor
Elsevier B.V.ISSN
0378-7753Cita bibliográfica
João Pereira, Yuniki Mediayati, Tom Sleutels, Francisco Fabregat-Santiago, Annemiek ter Heijne, Quantification of charge carriers and acetate diffusion lengths in intermittent electro-active biofilms using Electrochemical Impedance Spectroscopy, Journal of Power Sources, Volume 588, 2023, 233725, ISSN 0378-7753, https://doi.org/10.1016/j.jpowsour.2023.233725.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S0378775323011011Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Intermittent anode potential regimes have been used to increase the concentration of charge carriers in electro-active biofilms (EABfs). Even though this increased number of carriers is typically correlated to higher ... [+]
Intermittent anode potential regimes have been used to increase the concentration of charge carriers in electro-active biofilms (EABfs). Even though this increased number of carriers is typically correlated to higher current densities, estimating the concentration of charge carriers in EABfs and linking it to measured current density has never been done. In this study, Electrochemical Impedance Spectroscopy (EIS) and Optical Coherence Tomography (OCT) were used to estimate charge carriers and to study mass transfer limitations in intermittently polarized anodic EABfs. Intermittent potential steps of 20, 60, and 300 s were applied and EABf equilibration times were measured. These times were in the order of 10 s and correlated to the diffusion times obtained from EIS. Acetate consumption rates 100 times faster than the diffusion time of acetate into the EABfs were also estimated with EIS, indicating that current was diffusion limited. Using the capacitance and considering the measured volume of EABf, concentrations of charge carriers ranging from 0.05 molcharge carriers m−3EABf at current densities of 1 A m−2 up to 0.2 molcharge carriers m−3EABf at current densities higher than 2 A m−2 were calculated. This study shows that EIS can be used to study developing EABfs in a non-destructive way and in real-time. [-]
Publicado en
Journal of Power Sources, Volume 588, 2023Entidad financiadora
Cooperation framework of Wetsus | Ministerie van Economische Zaken | Nederlandse Organisatie voor Wetenschappelijk Onderzoek | Ministerio de Economía y Competitividad | Ministerie van Infrastructuur en Milieu | European Regional Development Fund | Wetsus
Código del proyecto o subvención
17516 | PID2020-116093RB-C41
Derechos de acceso
© 2023 The Authors
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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