Bacteria coated cathodes as an in‑situ hydrogen evolving platform for microbial electrosynthesis
| Autor: | Elisabet Perona-Vico, Laura Feliu-Paradeda, Sebastià Puig, Lluís Bañeras |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Hydrogen Bioelectric Energy Sources chemistry.chemical_element lcsh:Medicine 02 engineering and technology Biosensing Techniques Bacterial Physiological Phenomena Article Sporomusa Applied microbiology Microbial ecology 03 medical and health sciences Bioelectrochemistry Stress Physiological RNA Ribosomal 16S lcsh:Science Rhodocyclus Hydrogen production Bioelectroquímica Multidisciplinary Rhodobacter biology Bacteria Chemistry lcsh:R Microbial electrosynthesis Ecologia molecular Electrochemical Techniques 021001 nanoscience & nanotechnology biology.organism_classification Desulfovibrio Ecologia microbiana 030104 developmental biology Biofilms lcsh:Q Molecular ecology 0210 nano-technology Nuclear chemistry Biotechnology |
| Zdroj: | Scientific Reports, 2020, vol. 10, art.núm.19852 Articles publicats (D-EQATA) Perona Vico, Elisabet Feliu Paradeda, Laura Puig Broch, Sebastià. Bañeras Vives, Lluís 2020 Bacteria coated cathodes as an in‑situ hydrogen evolving platform for microbial electrosynthesis Scientific Reports 10 art.núm.19852 DUGiDocs – Universitat de Girona instname Scientific Reports Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020) |
| Popis: | Hydrogen is a key intermediate element in microbial electrosynthesis as a mediator of the reduction of carbon dioxide (CO2) into added value compounds. In the present work we aimed at studying the biological production of hydrogen in biocathodes operated at − 1.0 V vs. Ag/AgCl, using a highly comparable technology and CO2 as carbon feedstock. Ten bacterial strains were chosen from genera Rhodobacter, Rhodopseudomonas, Rhodocyclus, Desulfovibrio and Sporomusa, all described as hydrogen producing candidates. Monospecific biofilms were formed on carbon cloth cathodes and hydrogen evolution was constantly monitored using a microsensor. Eight over ten bacteria strains showed electroactivity and H2 production rates increased significantly (two to eightfold) compared to abiotic conditions for two of them (Desulfovibrio paquesii and Desulfovibrio desulfuricans). D. paquesii DSM 16681 exhibited the highest production rate (45.6 ± 18.8 μM min−1) compared to abiotic conditions (5.5 ± 0.6 μM min−1), although specific production rates (per 16S rRNA copy) were similar to those obtained for other strains. This study demonstrated that many microorganisms are suspected to participate in net hydrogen production but inherent differences among strains do occur, which are relevant for future developments of resilient biofilm coated cathodes as a stable hydrogen production platform in microbial electrosynthesis This study has received funding from the European Union’s Horizon 2020 research and innovation program under the grant agreement no 760431. LEQUIA and IEA have been recognized as a consolidated research groups by the Catalan Government (2017-SGR-1552 and 2017SGR-548, respectively). E. P.-V. is grateful for the Research Training grant from the University of Girona (IFUdG2018/52). S.P. is a Serra Hunter Fellow (UdG-AG-575) and acknowledges the funding from the ICREA Academia award |
| Databáze: | OpenAIRE |
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