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• W2765221970 abstract "In microbial fuel cells, electricity generation is assumed by bacterial degradation of low-grade organics generating electrons that are transferred to an electrode. The nature and efficiency of the electron transfer from the bacteria to the electrodes are determined by several chemical, physical and biological parameters. Specifically, the application of a specific potential at the bioanode has been shown to stimulate the formation of an electro-active biofilm, but the underlying mechanisms remain poorly understood. In this study, we have investigated the effect of an applied potential on the formation and electroactivity of biofilms established by Shewanella oneidensis bacteria on graphite felt electrodes in single- and double-chamber reactor configurations in oxic conditions. Using amperometry, cyclic voltammetry, and OCP/Power/Polarization curves techniques, we showed that a potential ranging between -0.3V and +0.5V (vs. Ag/AgCl/KCl sat.) and its converse application to a couple of electrodes leads to different electrochemical behaviors, anodic currents and biofilm architectures. For example, when the bacteria were confined in the anodic compartment of a double-chamber cell, a negative applied potential (-0.3V) at the bioanode favors a mediated electron transfer correlated with the progressive formation of a biofilm that fills the felt porosity and bridges the graphite fibers. In contrast, a positive applied potential (+0.3V) at the bioanode stimulates a direct electron transfer resulting in the fast-bacterial colonization of the fibers only. These results provide significant insight for the understanding of the complex bacteria-electrode interactions in microbial fuel cells." @default.
• W2765221970 created "2017-11-10" @default.
• W2765221970 creator A5035278401 @default.
• W2765221970 creator A5053906395 @default.
• W2765221970 creator A5060252948 @default.
• W2765221970 date "2018-04-01" @default.
• W2765221970 modified "2023-09-25" @default.
• W2765221970 title "Effect of anode polarization on biofilm formation and electron transfer in Shewanella oneidensis /graphite felt microbial fuel cells" @default.
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• W2765221970 doi "https://doi.org/10.1016/j.bioelechem.2017.10.008" @default.
• W2765221970 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29132011" @default.
• W2765221970 hasPublicationYear "2018" @default.
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