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

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

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

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.
Original languageEnglish (US)
Pages (from-to)379-382
Number of pages4
JournalBioelectrochemistry
Volume106
DOIs
StatePublished - Dec 2015
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-I1-003-13
Acknowledgements: 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).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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