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

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    Type
    Article
    Authors
    Liu, Jia
    Hou, Huijie
    Chen, Xiaofen
    Bazan, Guillermo C. cc
    Kashima, Hiroyuki
    Logan, Bruce cc
    KAUST Grant Number
    KUS-I1-003-13
    Date
    2015-12
    Permanent link to this record
    http://hdl.handle.net/10754/597835
    
    Metadata
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    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.
    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).
    Publisher
    Elsevier BV
    Journal
    Bioelectrochemistry
    DOI
    10.1016/j.bioelechem.2015.07.001
    PubMed ID
    26265121
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.bioelechem.2015.07.001
    Scopus Count
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