Set potential regulation reveals additional oxidation peaks of Geobacter sulfurreducens anodic biofilms

Handle URI:
http://hdl.handle.net/10754/599605
Title:
Set potential regulation reveals additional oxidation peaks of Geobacter sulfurreducens anodic biofilms
Authors:
Zhu, Xiuping; Yates, Matthew D.; Logan, Bruce E.
Abstract:
Higher current densities produced in microbial fuel cells and other bioelectrochemical systems are associated with the presence of various Geobacter species. A number of electron transfer components are involved in extracellular electron transfer by the model exoelectrogen, Geobacter sulfurreducens. It has previously been shown that 5 main oxidation peaks can be identified in cyclic voltammetry scans. It is shown here that 7 separate oxidation peaks emerged over relatively long periods of time when a larger range of set potentials was used to acclimate electroactive biofilms. The potentials of oxidation peaks obtained with G. sulfurreducens biofilms acclimated at 0.60 V (vs. Ag/AgCl) were different from those that developed at - 0.46 V, and both of their peaks were different from those obtained for biofilms incubated at - 0.30 V, 0 V, and 0.30 V. These results expand the known range of potentials for which G. sulfurreducens produces identifiable oxidation peaks that could be important for extracellular electron transfer. © 2012 Elsevier B.V.
Citation:
Zhu X, Yates MD, Logan BE (2012) Set potential regulation reveals additional oxidation peaks of Geobacter sulfurreducens anodic biofilms. Electrochemistry Communications 22: 116–119. Available: http://dx.doi.org/10.1016/j.elecom.2012.06.013.
Publisher:
Elsevier BV
Journal:
Electrochemistry Communications
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Aug-2012
DOI:
10.1016/j.elecom.2012.06.013
Type:
Article
ISSN:
1388-2481
Sponsors:
This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST). We also thank Hiroyuki Kashima for help in confirming the purity of the reactors.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZhu, Xiupingen
dc.contributor.authorYates, Matthew D.en
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-28T05:54:10Zen
dc.date.available2016-02-28T05:54:10Zen
dc.date.issued2012-08en
dc.identifier.citationZhu X, Yates MD, Logan BE (2012) Set potential regulation reveals additional oxidation peaks of Geobacter sulfurreducens anodic biofilms. Electrochemistry Communications 22: 116–119. Available: http://dx.doi.org/10.1016/j.elecom.2012.06.013.en
dc.identifier.issn1388-2481en
dc.identifier.doi10.1016/j.elecom.2012.06.013en
dc.identifier.urihttp://hdl.handle.net/10754/599605en
dc.description.abstractHigher current densities produced in microbial fuel cells and other bioelectrochemical systems are associated with the presence of various Geobacter species. A number of electron transfer components are involved in extracellular electron transfer by the model exoelectrogen, Geobacter sulfurreducens. It has previously been shown that 5 main oxidation peaks can be identified in cyclic voltammetry scans. It is shown here that 7 separate oxidation peaks emerged over relatively long periods of time when a larger range of set potentials was used to acclimate electroactive biofilms. The potentials of oxidation peaks obtained with G. sulfurreducens biofilms acclimated at 0.60 V (vs. Ag/AgCl) were different from those that developed at - 0.46 V, and both of their peaks were different from those obtained for biofilms incubated at - 0.30 V, 0 V, and 0.30 V. These results expand the known range of potentials for which G. sulfurreducens produces identifiable oxidation peaks that could be important for extracellular electron transfer. © 2012 Elsevier B.V.en
dc.description.sponsorshipThis research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST). We also thank Hiroyuki Kashima for help in confirming the purity of the reactors.en
dc.publisherElsevier BVen
dc.subjectAnode potentialen
dc.subjectBioelectrochemical systemen
dc.subjectExtracellular electron transferen
dc.subjectGeobacter sulfurreducensen
dc.titleSet potential regulation reveals additional oxidation peaks of Geobacter sulfurreducens anodic biofilmsen
dc.typeArticleen
dc.identifier.journalElectrochemistry Communicationsen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
kaust.grant.numberKUS-I1-003-13en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.