Increased carbon dioxide reduction to acetate in a microbial electrosynthesis reactor with a reduced graphene oxide-coated copper foam composite cathode
| Autor: | Marc H. Overgaard, Yiming Chen, Lulu Wan, Adam Carsten Stoot, Pier-Luc Tremblay, Nabin Aryal, Tian Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
medicine.medical_specialty
Materials science Bioelectric Energy Sources Biophysics Oxide chemistry.chemical_element Biocompatible Materials 02 engineering and technology Acetates Veillonellaceae Electrochemistry 01 natural sciences law.invention chemistry.chemical_compound Bioreactors Bioelectrochemical reactor law Microbial electrosynthesis medicine Reduced graphene oxide Physical and Theoretical Chemistry Electrodes Graphene 010401 analytical chemistry Electrochemical Techniques General Medicine Carbon Dioxide 021001 nanoscience & nanotechnology Copper Cathode 0104 chemical sciences chemistry Chemical engineering Biofilms Bioelectrochemistry Graphite 0210 nano-technology Biocatalyst Oxidation-Reduction Copper foam |
| Zdroj: | Aryal, N, Wan, L, Overgaard, M H, Stoot, A C, Chen, Y, Tremblay, P L & Zhang, T 2019, ' Increased carbon dioxide reduction to acetate in a microbial electrosynthesis reactor with a reduced graphene oxide-coated copper foam composite cathode ', Bioelectrochemistry, vol. 128, pp. 83-93 . https://doi.org/10.1016/j.bioelechem.2019.03.011 |
| DOI: | 10.1016/j.bioelechem.2019.03.011 |
| Popis: | Microbial electrosynthesis is a bioprocess where microbes reduce CO 2 into multicarbon chemicals with electrons derived from the cathode of a bioelectrochemical reactor. Developing a highly productive microbial electrosynthesis reactor requires excellent electrical connection between the electrochemical setup, the cathode, and the microbes. Copper is a highly conductive cathode material widely employed in electrochemical apparatuses. However, the antimicrobial properties of copper limit its usage for bioelectrochemistry. Here, biocompatible reduced graphene oxide coated on copper foam is synthesized as a cathode material for the microbial electrosynthesis of acetate from CO 2 . Dense and electroactive Sporomusa ovata biofilms form on the surface of reduced graphene oxide-coated copper foam electrodes while only scattered and damaged cells cover uncoated copper electrodes. Besides the formation of metabolically-active biofilms, acetate production rate from CO 2 is 21.3 and 43.5-fold higher with this novel composite cathode compared with an uncoated copper foam cathode and a reversed cathode made of reduced graphene oxide foam coated with copper, respectively. The results demonstrate that reduced graphene oxide can be employed as a biocompatible and conductive buffer between microbes and bactericidal electrode materials with excellent electrochemical property to enable highly performant microbial electrosynthesis. |
| Databáze: | OpenAIRE |
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