Journal article
Highly Conductive Poly(3,4-ethylenedioxythiophene) Polystyrene Sulfonate Polymer Coated Cathode for the Microbial Electrosynthesis of Acetate From Carbon Dioxide
Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark1
Wuhan University of Technology2
Department of Chemical and Biochemical Engineering, Technical University of Denmark3
The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark4
Microbial electrosynthesis (MES) is a bioelectrochemical technology developed for the conversion of carbon dioxide and electric energy into multicarbon chemicals of interest. As with other biotechnologies, achieving high production rate is a prerequisite for scaling up. In this study, we report the development of a novel cathode for MES, which was fabricated by coating carbon cloth with conductive poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) polymer.
Sporomusa ovata-driven MES reactors equipped with PEDOT:PSS-carbon cloth cathodes produced 252.5 ± 23.6 mmol d−1 acetate per m2 of electrode over a period of 14 days, which was 9.3 fold higher than the production rate observed with uncoated carbon cloth cathodes. Concomitantly, current density was increased to −3.2 ± 0.8 A m−2, which was 10.7-fold higher than the untreated cathode.
The coulombic efficiency with the PEDOT: PSS-carbon cloth cathodes was 78.6 ± 5.6%. Confocal laser scanning microscopy and scanning electron microscopy showed denser bacterial population on the PEDOT:PSS-carbon cloth cathodes. This suggested that PEDOT:PSS is more suitable for colonization by S. ovata during the bioelectrochemical process.
The results demonstrated that PEDOT: PSS is a promising cathode material for MES
Language: | English |
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Publisher: | Frontiers Media S.A. |
Year: | 2018 |
ISSN: | 2296598x |
Types: | Journal article |
DOI: | 10.3389/fenrg.2018.00072 |
ORCIDs: | Aryal, Nabin , Daugaard, Anders E. and Zhang, Tian |
A General Works acetate acetogens carbon dioxide microbial electrosynthesis