2024-03-29T14:19:46Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1494382023-11-13T08:46:45Zcom_10234_2507com_10234_9col_10234_6973
Repositori UJI
author
Heijne, Annemiek ter
author
Schaetzle, Olivier
author
Gimenez, Sixto
author
Navarro, Lucia
author
Hamelers, Bert
author
Fabregat-Santiago, Francisco
2016-02-10T11:56:04Z
2016-02-10T11:56:04Z
2015-12
TER HEIJNE, Annemiek, et al. Analysis of bio-anode performance through electrochemical impedance spectroscopy. Bioelectrochemistry, 2015, vol. 106, p. 64-72.
1567-5394
http://hdl.handle.net/10234/149438
http://dx.doi.org/10.1016/j.bioelechem.2015.04.002
In this paper we studied the performance of bioanodes under different experimental conditions using polarization curves and impedance spectroscopy. We have identified that the large capacitances of up to 1 mF·cm− 2 for graphite anodes have their origin in the nature of the carbonaceous electrode, rather than the microbial culture.
In some cases, the separate contributions of charge transfer and diffusion resistance were clearly visible, while in other cases their contribution was masked by the high capacitance of 1 mF·cm− 2. The impedance data were analyzed using the basic Randles model to analyze ohmic, charge transfer and diffusion resistances. Increasing buffer concentration from 0 to 50 mM and increasing pH from 6 to 8 resulted in decreased charge transfer and diffusion resistances; lowest values being 144 Ω·cm2 and 34 Ω·cm2, respectively. At acetate concentrations below 1 mM, current generation was limited by acetate. We show a linear relationship between inverse charge transfer resistance at potentials close to open circuit and saturation (maximum) current, associated to the Butler–Volmer relationship that needs further exploration.
eng
Copyright © 2016 Elsevier B.V. or its licensors or contributors
Electrochemical impedance spectroscopy
Internal resistance
Microbial fuel cell
Charge transfer
Diffusion
Analysis of bio-anode performance through electrochemical impedance spectroscopy
info:eu-repo/semantics/article
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