Electron donors and mediators in the thermodynamics and kinetics of CO2 bioreduction

Microbial electrosynthesis: carbonaceous electrode materials for CO2 conversion

“…Because of its pretty high half-saturation constant and limited solubility, microbes are extremely sensitive to minor variations in soluble CO2 concentration. A model suggests that using pure CO2 as a feeding gas can attenuate this impact, as demonstrated experimentally 121 . It is crucial to highlight, however, that eliminating a kinetic barrier may not be sufficient to significantly enhance output, because CO2 diffusion could be the primary limitation at a certain time.…”

“…Several kinetic processes, such as mass transfer, charge transfer, and microbial growth, occur concurrently in CO2 reduction, resulting in a complex and difficult-to-determine ratecontrolling step. As a result, while determining which of the kinetic phases in CO2 reduction is constraining the creation of value-added products, the system, and its situation must first be specified 121 . The rate-limiting steps in both operations are different.…”

“…A model suggests that using pure CO 2 as a feeding gas can attenuate this impact, as demonstrated experimentally. 121 It is crucial to highlight, however, that eliminating a kinetic barrier may not be sufficient to significantly enhance output because CO 2 diffusion could be the primary limitation at a certain time. The findings also showed that the CO 2 delivery strategy has a significant impact on reactor performance.…”

“…As a result, while determining which of the kinetic phases in CO 2 reduction is constraining the creation of value-added products, the system and its situation must first be specified. 121 The rate-limiting steps in both the operations are different. The main rate-controlling step in the scenario of CO 2 reduction without applied voltage is the formation of a reducing equivalent.…”

Electricity-Driven Microbial Metabolism of Carbon and Nitrogen: A Waste-to-Resource Solution

“…Microbial electrosynthesis incorporating photocatalysts has been covered extensively by multiple reviews. ,, Interested readers are referred to the original studies, including those on silicon nanowire array- Sporomusa ovata , Cd- Clostridium autoethanogenum , CdS- Moorella thermoacetica , In- Saccharomyces cerevisiae , and hierarchical pillar array electrodes- Synechocystis sp . Microbial electrosynthesis incorporating purified enzymes or hydrogen evolution reaction (HER) electrocatalysts have also been well discussed. , This section discusses the topic of microbial electrosynthesis incorporating the CO2RR electrocatalyst.…”