H₂ mediated mixed culture microbial electrosynthesis for high titer acetate production from CO₂.

ABSTRACT: Microbial electrosynthesis (MES) converts CO₂ into value-added products such as volatile fatty acids (VFAs) with minimal energy use, but low production titer has limited scale-up and commercialization. Mediated electron transfer via H₂ on the MES cathode has shown a higher conversion rate than the direct biofilm-based approach, as it is tunable via cathode potential control and accelerates electrosynthesis from CO₂. Here we report high acetate titers can be achieved via improved in situ H₂ supply by nickel foam decorated carbon felt cathode in mixed community MES systems. Acetate concentration of 12.5 g L^-1 was observed in 14 days with nickel-carbon cathode at a poised potential of -0.89 V (vs. standard hydrogen electrode, SHE),

SUBMITTER: Bian Y 

PROVIDER: S-EPMC10637882 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature