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Title (Primary) Redox mediators in microbial electrochemical systems
Author Gemünde, A.; Lai, B.; Pause, L.; Krömer, J.; Holtmann, D.
Journal ChemElectroChem
Year 2022
Department SOMA
Volume 9
Issue 13
Page From e202200216
Language englisch
Topic T7 Bioeconomy
Keywords electromicrobiology; redox mediators; mediated extracellular electron transfer; total turnover number; cross membrane mediator transport
Abstract Redox mediators are commonly used in microbial electrochemical systems to enable or enhance the electron transfer between microorganisms and electrodes. In recent studies, new insights into the mechanism of mediated extracellular electron transfer were gained, but some questions remain unanswered. In this review, some of the most outstanding research questions regarding the use of redox mediators in microbial electrochemical systems are being discussed. These include the recycling of artificial and natural redox mediators, limitations in electron transfer rates by mediator turnover, metabolic burden, membrane permeability, and the putative interaction sites between commonly used redox mediators and the proteins of the electron transport chain of diverse electroactive microorganisms. To simplify the planning of mediator-based bioelectrochemical systems, these molecular interaction sites are defined by their redox potential and are assigned to redox mediators, which are known or hypothesized to be able to transfer electrons from or to the specific interaction site. Furthermore, we address the kinetics of mediator transfer through the membrane and the potential rate-limiting step in mediator-based processes.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26140
Gemünde, A., Lai, B., Pause, L., Krömer, J., Holtmann, D. (2022):
Redox mediators in microbial electrochemical systems
ChemElectroChem 9 (13), e202200216