Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.elecom.2026.108188 |
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| Title (Primary) | Low-cost thermistor electrodes for numbering-up thermodynamic studies on electroactive biofilms |
| Author | Schößow, Y.; Harnisch, F.
; Korth, B.
|
| Source Titel | Electrochemistry Communications |
| Year | 2026 |
| Department | MIBITECH |
| Volume | 188 |
| Page From | art. 108188 |
| Language | englisch |
| Topic | T7 Bioeconomy |
| Keywords | Microbial thermodynamics; Bioelectrochemical system; Microbial electrochemical; Technologies; Geobacter; Entropy |
| Abstract | First bioelectrocalorimetric investigations of Geobacter enrichment biofilms performing extracellular electron transfer (EET) revealed the microbial electrochemical Peltier heat (Πm) as an entropic barrier leading to energy losses. Like its abiotic analog, Πm can be assumed to be a material constant, depending on the redox species performing EET, the working electrode material, and the electrolyte composition. To foster bioelectrocalorimetric research, a thermistor electrode setup was developed for determining Πm. Thermistor electrodes can be easily numbered up and hence allow systematic thermodynamic studies of the consequences of Πm on the energy balances of electroactive microorganisms and microbial electrochemical technologies. Thermistor electrodes were calibrated by applying defined heat pulses, resulting in a heat transfer coefficient K (0.595 ± 0.303 W K 1) and a heat capacity mCp (78.057 ± 28.705 J K 1). Subsequently, Πm of Geobacter enrichment biofilms cultivated on gold thermistor electrodes was measured, and the obtained Πm= 16.6 kJ e-mol 1 is comparable to values determined using an established bioelectrocalorimetric setup. This proof-of-concept lays the foundation for optimizing thermistor electrodes to systematically investigate and engineer the energy fluxes at the interface of electroactive microorganisms and electrodes. |
| Schößow, Y., Harnisch, F., Korth, B. (2026): Low-cost thermistor electrodes for numbering-up thermodynamic studies on electroactive biofilms Electrochem. Commun. 188 , art. 108188 10.1016/j.elecom.2026.108188 |
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