Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 501580
Title Biologically Induced Hydrogen Production Drives High Rate/High Efficiency Microbial Electrosynthesis of Acetate from Carbon Dioxide
Author(s) Jourdin, Ludovic; Lu, Yang; Flexer, Victoria; Keller, Jurg; Freguia, Stefano
Source ChemElectroChem 3 (2016)4. - ISSN 2196-0216 - p. 581 - 591.
DOI https://doi.org/10.1002/celc.201500530
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Biofilms - Biohydrogen - Carbon dioxide fixation - Electron transfer - Microbial electrosynthesis
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.

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