Catalytic response of microbial biofilms grown under fixed anode potentials depends on electrochemical cell configuration
| Autor: | Dónal Leech, Alma Siggins, Vincent O'Flaherty, Piet N.L. Lens, Thérèse Mahony, Amit Kumar, Krishna P. Katuri |
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| Rok vydání: | 2013 |
| Předmět: |
medicine.medical_specialty
Microbial fuel cell Chemistry General Chemical Engineering Analytical chemistry Biofilm General Chemistry 010501 environmental sciences 010402 general chemistry 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Catalysis Anode Electrochemical cell Bioelectrochemical reactor Chemical engineering 13. Climate action Bioelectrochemistry medicine Environmental Chemistry Current density 0105 earth and related environmental sciences |
| Zdroj: | Chemical Engineering Journal. 230:532-536 |
| ISSN: | 1385-8947 |
| Popis: | In microbial electrochemical cells the anode potential can vary over a wide range, which alters the thermodynamic energy available for bacterial-electrode electron exchange (termed electroactive bacteria). We investigated how anode potential affected the microbial catalytic response of the electroactive biofilm. Microbial biofilms induced to grow on graphite electrodes by application of a fixed applied anode potential in membrane-separated and membrane-less electrochemical cells show differences in electrocatalytic response. Maximum current density is obtained using +0.2 V vs. Ag/AgCl to induce biofilm growth in membrane-less cells, in contrast to a maximum achieved at lower applied potentials in a membrane-separated electrochemical cell configuration. This insight into differences in optimal applied potentials based on cell configuration can play an important role in selection of parameters required for microbial fuel cells and bio-electrochemical systems. |
| Databáze: | OpenAIRE |
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