Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1002/celc.202300311 |
Licence  |
|
| Title (Primary) | High salt electrolyte solutions challenge the electrochemical CO2 reduction reaction to formate at indium and tin cathodes |
| Author | Kas, A.
; Izadi, P.
; Harnisch, F.
|
| Source Titel | ChemElectroChem |
| Year | 2023 |
| Department | UMB |
| Volume | 10 |
| Issue | 23 |
| Page From | e202300311 |
| Language | englisch |
| Topic | T7 Bioeconomy |
| Supplements | https://chemistry-europe.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fcelc.202300311&file=celc202300311-sup-0001-misc_information.pdf |
| Keywords | electrobiorefineries; electrochemical CO2 reduction reaction; halophilic microorganisms; microbial electrosynthesis; secondary microbial electrochemical technologies |
| Abstract | Formate is a promising product of the electrochemical CO2 reduction reaction (eCO2RR) that can serve as feedstock for biological syntheses. Indium (In) has been shown as a selective electrocatalyst of eCO2RR
with high coulombic efficiency (CE) for formate production at small
scale at biocompatible non-halophilic that is low salt conditions. Ohmic
losses and challenges on potential/current distribution arise for
scaling-up, where higher salt loads are advantageous for minimizing
these. Higher salt concentration within the solution or halophilic
conditions also enable the use of halophilic biocatalysts. We optimized
eCO2RR with halophilic media by introducing tin (Sn) as a
more sustainable alternative to In. At 3 % NaCl providing a catholyte
conductivity (
of 70 mS cm−1, the maximum specific formate production rates (rformate) of 0.143±0.030 mmol cm−2 h−1 and 0.167±0.027 mmol cm−2 h−1 were achieved at In and Sn electrocatalysts, respectively. Decrease in rformate and CE, in addition to higher variation between replicates was observed with further increase in NaCl concentration above 3 % (
>70 mS cm−1) up to 10 % (
=127 mS cm−1). This study sets the foundation for integrated microbial synthesis by halophiles. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=27776 |
| Kas, A., Izadi, P., Harnisch, F. (2023): High salt electrolyte solutions challenge the electrochemical CO2 reduction reaction to formate at indium and tin cathodes ChemElectroChem 10 (23), e202300311 10.1002/celc.202300311 |
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