Cargando…
Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis
Hydrogen is a key intermediate element in microbial electrosynthesis as a mediator of the reduction of carbon dioxide (CO(2)) 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 comp...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7670457/ https://www.ncbi.nlm.nih.gov/pubmed/33199799 http://dx.doi.org/10.1038/s41598-020-76694-y |
_version_ | 1783610742509928448 |
---|---|
author | Perona-Vico, Elisabet Feliu-Paradeda, Laura Puig, Sebastià Bañeras, Lluis |
author_facet | Perona-Vico, Elisabet Feliu-Paradeda, Laura Puig, Sebastià Bañeras, Lluis |
author_sort | Perona-Vico, Elisabet |
collection | PubMed |
description | Hydrogen is a key intermediate element in microbial electrosynthesis as a mediator of the reduction of carbon dioxide (CO(2)) 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 CO(2) 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 H(2) 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. |
format | Online Article Text |
id | pubmed-7670457 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-76704572020-11-18 Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis Perona-Vico, Elisabet Feliu-Paradeda, Laura Puig, Sebastià Bañeras, Lluis Sci Rep Article Hydrogen is a key intermediate element in microbial electrosynthesis as a mediator of the reduction of carbon dioxide (CO(2)) 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 CO(2) 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 H(2) 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. Nature Publishing Group UK 2020-11-16 /pmc/articles/PMC7670457/ /pubmed/33199799 http://dx.doi.org/10.1038/s41598-020-76694-y Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Perona-Vico, Elisabet Feliu-Paradeda, Laura Puig, Sebastià Bañeras, Lluis Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis |
title | Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis |
title_full | Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis |
title_fullStr | Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis |
title_full_unstemmed | Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis |
title_short | Bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis |
title_sort | bacteria coated cathodes as an in-situ hydrogen evolving platform for microbial electrosynthesis |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7670457/ https://www.ncbi.nlm.nih.gov/pubmed/33199799 http://dx.doi.org/10.1038/s41598-020-76694-y |
work_keys_str_mv | AT peronavicoelisabet bacteriacoatedcathodesasaninsituhydrogenevolvingplatformformicrobialelectrosynthesis AT feliuparadedalaura bacteriacoatedcathodesasaninsituhydrogenevolvingplatformformicrobialelectrosynthesis AT puigsebastia bacteriacoatedcathodesasaninsituhydrogenevolvingplatformformicrobialelectrosynthesis AT baneraslluis bacteriacoatedcathodesasaninsituhydrogenevolvingplatformformicrobialelectrosynthesis |