Recent developments and key barriers to microbial CO2 electrobiorefinery

Lee, Soo-Youn; Oh, You-Kwan; Lee, Sang‐Min; Fitriana, Hana Nur; Moon, Myounghoon; Kim, Min‐Sik; Lee, Jiye; Min, Kyoungseon; Park, Gwon Woo; Lee, Joon-Pyo; Lee, Jin-Suk

doi:10.1016/j.biortech.2020.124350

Cited by 49 publications

(20 citation statements)

References 102 publications

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“…Electron uptake from extracellular sources is mainly dependent on direct cell contact via a biofilm on the cathode surface [17]. Modification of cathode materials by decorating with functional groups and increasing surface hydrophilicity might benefit the adhesion and growth of bacterial biofilm [1]. Generally, negatively charged functional groups on the bacterial surface are responsible for the electrostatic binding of cationic groups [18].…”

Section: Calculation Of Faradaic Efficiencymentioning

confidence: 99%

“…Microbial electrosynthesis (MES) is an economically emerging bio-electrochemical technology for transforming CO 2 and renewable electrical energy into chemicals and fuels [1,2]. It could allow the storage and increase in value of intermittent renewable energies such as solar and wind [3].…”

Section: Introductionmentioning

confidence: 99%

“…In an MES reaction, the electroactive microorganisms (called electrotrophs) can utilize electrons (e − ) from external conducting materials (i.e., electrodes) as reducing energy to catalyze the conversion of CO 2 [4]. These electrotrophs achieve CO 2 conversion through several carbon-fixation pathways including the reductive pentose phosphate cycle (e.g., photo-or chemoautotrophs), reductive tricarboxylic acid cycle (e.g., Clostridium thiosulfatophilum), and reductive acetyl-CoA pathway (e.g., Clostridium ljungdahlii) [1,5]. Rhodobacter sphaeroides, a CO 2 -fixing chemoautotrophic bacterium, can catalyze both the production and consumption of hydrogen molecules (H 2 ) [6].…”

Section: Introductionmentioning

confidence: 99%

“…Sci. 2021, 11, 7585 2 of 10 mediators) or (ii) direct electron uptake via physical contact through electron-transfer proteins or apparatus [1,8]. Although the cathodically evolved H 2 can support electrotrophic growth of a microorganism, the direct supply of cathodic electrons to microorganisms is more sustainable and energy efficient in an MES reaction [8].…”

Section: Introductionmentioning

confidence: 99%

“…In a recent investigation, MES-driven CO2 uptake and H2 production in R. sphaeroides were found to occur simultaneously without additional organic carbon substrates [7]. Extracellular electron uptake mechanisms of electrotrophs from electrodes rely on: (i) indirect electron uptake by H2 or electron shuttles (i.e., natural and artificial redox mediators) or (ii) direct electron uptake via physical contact through electron-transfer proteins or apparatus [1,8]. Although the cathodically evolved H2 can support electrotrophic growth of a microorganism, the direct supply of cathodic electrons to microorganisms is more sustainable and energy efficient in an MES reaction [8].…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of a Graphite Felt Cathode with Amide-Coupling Enhances the Electron Uptake of Rhodobacter sphaeroides

Fitriana

Lee

et al. 2021

Applied Sciences

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Microbial electrosynthesis (MES) is a promising technology platform for the production of chemicals and fuels from CO2 and external conducting materials (i.e., electrodes). In this system, electroactive microorganisms, called electrotrophs, serve as biocatalysts for cathodic reaction. While several CO2-fixing microorganisms can reduce CO2 to a variety of organic compounds by utilizing electricity as reducing energy, direct extracellular electron uptake is indispensable to achieve highly energy-efficient reaction. In the work reported here, Rhodobacter sphaeroides, a CO2-fixing chemoautotroph and a potential electroactive bacterium, was adopted to perform a cathodic CO2 reduction reaction via MES. To promote direct electron uptake, the graphite felt cathode was modified with a combination of chitosan and carbodiimide compound. Robust biofilm formation promoted by amide functionality between R. sphaeroides and a graphite felt cathode showed significantly higher faradaic efficiency (98.0%) for coulomb to biomass and succinic acid production than those of the bare (34%) and chitosan-modified graphite cathode (77.8%), respectively. The results suggest that cathode modification using a chitosan/carbodiimide composite may facilitate electron utilization by improving direct contact between an electrode and R. sphaeroides.

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Section: Calculation Of Faradaic Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Surface Modification of a Graphite Felt Cathode with Amide-Coupling Enhances the Electron Uptake of Rhodobacter sphaeroides

Fitriana

Lee

et al. 2021

Applied Sciences

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Green Chemistry, Biocatalysis, and the Chemical Industry of the Future

Sheldon

Brady

2022

ChemSusChem

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In the movement to decarbonize our economy and move away from fossil fuels we will need to harness the waste products of our activities, such as waste lignocellulose, methane, and carbon dioxide. Our wastes need to be integrated into a circular economy where used products are recycled into a manufacturing carbon cycle. Key to this will be the recycling of plastics at the resin and monomer levels. Biotechnology is well suited to a future chemical industry that must adapt to widely distributed and diverse biological chemical feedstocks. Our increasing mastery of biotechnology is allowing us to develop enzymes and organisms that can synthesize a widening selection of desirable bulk chemicals, including plastics, at commercially viable productivities. Integration of bioreactors with electrochemical systems will permit new production opportunities with enhanced productivities and the advantage of using a low‐carbon electricity from renewable and sustainable sources.

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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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Recent developments and key barriers to microbial CO2 electrobiorefinery

Cited by 49 publications

References 102 publications

Surface Modification of a Graphite Felt Cathode with Amide-Coupling Enhances the Electron Uptake of Rhodobacter sphaeroides

Surface Modification of a Graphite Felt Cathode with Amide-Coupling Enhances the Electron Uptake of Rhodobacter sphaeroides

Green Chemistry, Biocatalysis, and the Chemical Industry of the Future

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

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Recent developments and key barriers to microbial CO2 electrobiorefinery

Cited by 49 publications

References 102 publications

Surface Modification of a Graphite Felt Cathode with Amide-Coupling Enhances the Electron Uptake of Rhodobacter sphaeroides

Surface Modification of a Graphite Felt Cathode with Amide-Coupling Enhances the Electron Uptake of Rhodobacter sphaeroides

Green Chemistry, Biocatalysis, and the Chemical Industry of the Future

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

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Product

Resources

About

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