Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1002/anie.202312647
Licence creative commons licence
Title (Primary) Cable bacteria skeletons as catalytically active electrodes
Author Digel, L.; Mierzwa, M.; Bonné, R.; Zieger, S.; Pavel, I.; Ferapontova, E.; Koren, K.; Boesen, T.; Harnisch, F. ORCID logo ; Marshall, I.; Nielsen, L.P.; Kuhn, A.
Source Titel Angewandte Chemie-International Edition
Year 2024
Department MIBITECH
Volume 63
Issue 6
Page From e202312647
Language englisch
Topic T7 Bioeconomy
Keywords Bioelectrochemistry; Cable bacteria; oxygen reduction reaction; oxygen evolution reaction; Bipolar electrochemistry
Abstract Cable bacteria are multicellular, filamentous bacteria that use internal conductive fibers to transport electrons over centimeter distances from donors within anoxic sediment layers to oxygen at the surface. We extracted the fibers and used them as free-standing bio-based electrodes to investigate their electrocatalytic behavior. The fibers catalyzed the reversible interconversion of oxygen and water, and an electric current was running through the fibers even when the potential difference was generated solely by a gradient of oxygen concentration. Oxygen reduction as well as oxygen evolution were confirmed by optical measurements. Within living cable bacteria, oxygen reduction by direct electrocatalysis on the fibers and not by membrane-bound proteins readily explains exceptionally high cell-specific oxygen consumption rates observed in the oxic zone, while electrocatalytic water oxidation may provide oxygen to cells in the anoxic zone.
Persistent UFZ Identifier
Digel, L., Mierzwa, M., Bonné, R., Zieger, S., Pavel, I., Ferapontova, E., Koren, K., Boesen, T., Harnisch, F., Marshall, I., Nielsen, L.P., Kuhn, A. (2024):
Cable bacteria skeletons as catalytically active electrodes
Angew. Chem.-Int. Edit. 63 (6), e202312647 10.1002/anie.202312647