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The open circuit potential of Geobacter sulfurreducens bioanodes depends on the electrochemical adaptation of the strain

Abstract : Bioanodes for acetate oxidation were formed with pure cultures of Geobacter sulfurreducens under constant polarization potential. With the original commercial strain, the bioanodes formed at + 0.2 V/SCE exhibited open circuit potential (OCP) of 0.0 V/SCE, while the bioanodes formed at − 0.2 V/SCE had OCP around − 0.52 V/SCE. In contrast, the bioanodes formed with bacterial cells collected from a previous current-producing bioanode exhibited OCP of − 0.52 V/SCE whatever the polarization potential used to form them (+ 0.2 V/SCE or − 0.2 V/SCE). The "electrochemically-adapted strain" kept its electrochemical characteristics after successive cultures in solution. High steady-state currents were reached (16-19 A m- 2) in all cases without any dependence on strain adaptation or applied potential.
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Submitted on : Tuesday, September 10, 2013 - 1:48:35 PM
Last modification on : Tuesday, July 5, 2022 - 9:13:59 AM
Long-term archiving on: : Thursday, December 12, 2013 - 10:19:12 AM

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Laurence Soussan, Benjamin Erable, Marie-Line Délia-Dupuy, Alain Bergel. The open circuit potential of Geobacter sulfurreducens bioanodes depends on the electrochemical adaptation of the strain. Electrochemistry Communications, Elsevier, 2013, vol. 33, pp. 35-38. ⟨10.1016/j.elecom.2013.04.013⟩. ⟨hal-00860257⟩

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