Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells

Handle URI:
http://hdl.handle.net/10754/597835
Title:
Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells
Authors:
Liu, Jia; Hou, Huijie; Chen, Xiaofen; Bazan, Guillermo C.; Kashima, Hiroyuki; Logan, Bruce E. ( 0000-0001-7478-8070 )
Abstract:
© 2015 Elsevier B.V. A conjugated oligoelectrolyte (COE), which spontaneously aligns within cell membranes, was shown to completely inhibit H2 uptake by Geobacter sulfurreducens in microbial electrolysis cells. Coulombic efficiencies that were 490±95%, due to H2 recycling between the cathode and microorganisms on the anode, were reduced to 86±2% with COE addition. The use of the COE resulted in a 67-fold increase in H2 gas recovery, and a 4.4-fold increase in acetate removal. Current generation, H2 recovery and COD removals by Geobacter metallireducens, which cannot use H2, were unaffected by COE addition. These results show that this COE is an effective H2 uptake inhibitor, and that it can enable improved and sustained H2 gas recovery in this bioelectrochemical system.
Citation:
Liu J, Hou H, Chen X, Bazan GC, Kashima H, et al. (2015) Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells. Bioelectrochemistry 106: 379–382. Available: http://dx.doi.org/10.1016/j.bioelechem.2015.07.001.
Publisher:
Elsevier BV
Journal:
Bioelectrochemistry
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Dec-2015
DOI:
10.1016/j.bioelechem.2015.07.001
PubMed ID:
26265121
Type:
Article
ISSN:
1567-5394
Sponsors:
Funding for this research was provided by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) (Pennsylvania State University) and the Institute for Collaborative Biotechnologies through grant W911NF-09-0001 from the U.S. Army Research Office (University of California,Santa Barbara).
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorLiu, Jiaen
dc.contributor.authorHou, Huijieen
dc.contributor.authorChen, Xiaofenen
dc.contributor.authorBazan, Guillermo C.en
dc.contributor.authorKashima, Hiroyukien
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T12:57:31Zen
dc.date.available2016-02-25T12:57:31Zen
dc.date.issued2015-12en
dc.identifier.citationLiu J, Hou H, Chen X, Bazan GC, Kashima H, et al. (2015) Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells. Bioelectrochemistry 106: 379–382. Available: http://dx.doi.org/10.1016/j.bioelechem.2015.07.001.en
dc.identifier.issn1567-5394en
dc.identifier.pmid26265121en
dc.identifier.doi10.1016/j.bioelechem.2015.07.001en
dc.identifier.urihttp://hdl.handle.net/10754/597835en
dc.description.abstract© 2015 Elsevier B.V. A conjugated oligoelectrolyte (COE), which spontaneously aligns within cell membranes, was shown to completely inhibit H2 uptake by Geobacter sulfurreducens in microbial electrolysis cells. Coulombic efficiencies that were 490±95%, due to H2 recycling between the cathode and microorganisms on the anode, were reduced to 86±2% with COE addition. The use of the COE resulted in a 67-fold increase in H2 gas recovery, and a 4.4-fold increase in acetate removal. Current generation, H2 recovery and COD removals by Geobacter metallireducens, which cannot use H2, were unaffected by COE addition. These results show that this COE is an effective H2 uptake inhibitor, and that it can enable improved and sustained H2 gas recovery in this bioelectrochemical system.en
dc.description.sponsorshipFunding for this research was provided by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) (Pennsylvania State University) and the Institute for Collaborative Biotechnologies through grant W911NF-09-0001 from the U.S. Army Research Office (University of California,Santa Barbara).en
dc.publisherElsevier BVen
dc.subjectConjugated oligoelectrolyteen
dc.subjectEnergy recoveryen
dc.subjectGeobacter sulfurreducensen
dc.subjectH<inf>2</inf> uptake inhibitionen
dc.subjectMicrobial electrolysis cellsen
dc.titleConjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cellsen
dc.typeArticleen
dc.identifier.journalBioelectrochemistryen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
dc.contributor.institutionHuazhong University of Science and Technology, Wuhan, Chinaen
dc.contributor.institutionUniversity of California, Santa Barbara, Santa Barbara, United Statesen
kaust.grant.numberKUS-I1-003-13en
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