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

Jia Liu; Huijie Hou; Xiaofen Chen; Guillermo C. Bazan; Hiroyuki Kashima; Bruce E. Logan

doi:10.1016/j.bioelechem.2015.07.001

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

Jia Liu, Huijie Hou, Xiaofen Chen, Guillermo C. Bazan, Hiroyuki Kashima, Bruce E. Logan

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	379-382
Number of pages	4
Journal	Bioelectrochemistry
Volume	106
DOIs	https://doi.org/10.1016/j.bioelechem.2015.07.001
State	Published - Dec 1 2015

All Science Journal Classification (ASJC) codes

Biophysics
Physical and Theoretical Chemistry
Electrochemistry

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@article{40fd5995a00b4077ae43a53482a08612,

title = "Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells",

abstract = "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.",

author = "Jia Liu and Huijie Hou and Xiaofen Chen and Bazan, {Guillermo C.} and Hiroyuki Kashima and Logan, {Bruce E.}",

note = "Funding Information: 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).",

year = "2015",

month = dec,

day = "1",

doi = "10.1016/j.bioelechem.2015.07.001",

language = "English (US)",

volume = "106",

pages = "379--382",

journal = "Bioelectrochemistry",

issn = "1567-5394",

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T1 - Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells

AU - Liu, Jia

AU - Hou, Huijie

AU - Chen, Xiaofen

AU - Bazan, Guillermo C.

AU - Kashima, Hiroyuki

AU - Logan, Bruce E.

N1 - Funding Information: 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).

PY - 2015/12/1

Y1 - 2015/12/1

N2 - 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.

AB - 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.

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