Enhanced CO2 electroconversion of Rhodobacter sphaeroides by cobalt-phosphate complex assisted water oxidation

Fitriana, Hana Nur; Lee, Sang‐Min; Kim, Hui Su; Lee, Jiye; Lee, Yurim; Lee, Jin-Suk; Park, Hyo Jung; Ko, Chang Hyun; Lim, Sinye; Lee, Soo-Youn

doi:10.1016/j.bioelechem.2022.108102

Cited by 4 publications

(1 citation statement)

References 39 publications

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“…In recent years, microbial electrosynthesis (MES) has gained wide attention as famous green energy conversion and utilization technology. , MES is used in CO 2 electroreduction to transportable fuels, effectively solving the problem of CO 2 recycling. This approach is of great significance for environmental remediation, energy production, and resource management .…”

Section: Introductionmentioning

confidence: 99%

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO₂ Conversion

Zhou

Cheng

Xia

et al. 2022

ACS Sustainable Chem. Eng.

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In order to improve microbial electromethane generation (mEMG) with CO 2 conversion using excess renewable power, an electrical stimulation period was optimized to enrich active microorganisms on a biocathode and directionally strengthened electron transfer with a start-up mode of stepwisepromoted intermittent voltage. A highly adaptive microbial community was enriched on the biocathode for an electrical stimulation period of 1 h with the highest population abundance and diversity of archaea and bacteria. The living cell density and average coverage area ratio on the biocathode were 81.37 and 22.07%, respectively. The tryptophan, fulvic acid, and humic acid substances with peak fluorescence intensities in extracelluar polymers effectively improved electron transport in the mEMG system. The highest area capacitance of the biocathode was 13.96 mF/cm 2 . The biofilm and solution resistances first decreased to valleys (102.3 and 1.541 Ω) and then increased. The highest faradaic efficiency (95.37%) of CH 4 was obtained with 2.35 μmol/L coenzyme F420, leading to an increased CH 4 production rate by 39.68%.

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Section: Introductionmentioning

confidence: 99%

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO₂ Conversion

Zhou

Cheng

Xia

et al. 2022

ACS Sustainable Chem. Eng.

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Enhancing microbial CO₂ electrocatalysis for multicarbon reduction in a wet amine‐based catholyte

Su Kim,

Lee,

Moon

et al. 2024

ChemSusChem

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Microbial CO2 electroreduction (mCO2ER) offers a promising approach for producing high‐value multicarbon reductants from CO2 by combining CO2 fixing microorganisms with conducting materials (i.e., cathodes). However, the solubility and availability of CO2 in an aqueous electrolyte pose significant limitations in this system. This study demonstrates the efficient production of long‐chain multicarbon reductants, specifically carotenoids (~C40), within a wet amine‐based catholyte medium during mCO2ER. Optimizing the concentration of the biocompatible CO2 absorbent, monoethanolamine (MEA), led to enhanced CO2 fixation in the electroautotroph bacteria. Molecular biological analyses revealed that MEA in the catholyte medium redirected the carbon flux towards carotenoid biosynthesis during mCO2ER. The faradaic efficiency of mCO2ER with MEA for carotenoid production was 4.5‐fold higher than that of the control condition. These results suggest the mass transport bottleneck in bioelectrochemical systems could be effectively addressed by MEA‐assissted mCO2ER, enabling highly efficient production of valuable products from CO2.

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Evaluation of Growth and Utilization Potential of Rhodobacter sphaeroides in Reused Medium

Park

Kim

et al. 2022

Mol Biotechnol

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Enhanced CO2 electroconversion of Rhodobacter sphaeroides by cobalt-phosphate complex assisted water oxidation

Cited by 4 publications

References 39 publications

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO₂ Conversion

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO₂ Conversion

Enhancing microbial CO₂ electrocatalysis for multicarbon reduction in a wet amine‐based catholyte

Evaluation of Growth and Utilization Potential of Rhodobacter sphaeroides in Reused Medium

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Enhanced CO2 electroconversion of Rhodobacter sphaeroides by cobalt-phosphate complex assisted water oxidation

Cited by 4 publications

References 39 publications

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO2 Conversion

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO2 Conversion

Enhancing microbial CO2 electrocatalysis for multicarbon reduction in a wet amine‐based catholyte

Evaluation of Growth and Utilization Potential of Rhodobacter sphaeroides in Reused Medium

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Product

Resources

About

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO₂ Conversion

Optimized Electrical Stimulation Period Facilitated Microbial Electromethane Generation with CO₂ Conversion

Enhancing microbial CO₂ electrocatalysis for multicarbon reduction in a wet amine‐based catholyte