Biologically induced hydrogen production drives high rate/high efficiency microbial electrosynthesis of acetate from carbon dioxide

Jourdin, Ludovic, Lu, Yang, Flexer, Victoria, Keller, Jurg and Freguia, Stefano (2016) Biologically induced hydrogen production drives high rate/high efficiency microbial electrosynthesis of acetate from carbon dioxide. ChemElectroChem, 3 4: 581-591. doi:10.1002/celc.201500530


Author Jourdin, Ludovic
Lu, Yang
Flexer, Victoria
Keller, Jurg
Freguia, Stefano
Title Biologically induced hydrogen production drives high rate/high efficiency microbial electrosynthesis of acetate from carbon dioxide
Journal name ChemElectroChem   Check publisher's open access policy
ISSN 2196-0216
Publication date 2016-01-13
Year available 2016
Sub-type Article (original research)
DOI 10.1002/celc.201500530
Open Access Status Not Open Access
Volume 3
Issue 4
Start page 581
End page 591
Total pages 12
Place of publication Weinheim, Germany
Publisher Wiley-VCH Verlag
Collection year 2017
Language eng
Formatted abstract
Electron-transfer pathways occurring in biocathodes are still unknown. We demonstrate here that high rates of acetate production by microbial electrosynthesis are mainly driven by an electron flux from the electrode to carbon dioxide, occurring via biologically induced hydrogen, with (99±1) % electron recovery into acetate. Nevertheless, acetate production is shown to occur exclusively within the biofilm. The acetate producers, putatively Acetoanaerobium, showed the remarkable ability to consume a high H2 flux before it could escape from the biofilm. At zero wastage of H2 gas, it allows superior production rates and lesser technical bottlenecks over technologies that rely on mass transfer of H2 to microorganisms suspended in aqueous solution. This study suggests that bacterial modification of the electrode surface (possibly via synthesis of Cu nanoparticles) is directly involved in the significant enhancement of the hydrogen production.
Keyword Biofilms
Biohydrogen
Carbon dioxide fixation
Electron transfer
Microbial electrosynthesis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
 
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