Current trends in enzymatic electrosynthesis for CO2 reduction

Abstract

Enzymatic electrosynthesis offers a novel approach to the production of chemicals through CO 2 sequestration. In this mini-review, we present the most recent state-of-the-art information on enzymatic CO 2 reduction for the production of chemicals such as formic acid using oxidoreductase (single or multiple) enzymes as electrocatalysts in enzymatic electrosynthesis cell (EEC). Key challenges towards upscaling of this CO 2 utilization approach are identified and future research directions are discussed briefly.

Life Cycle Assessment of Microbial Electrosynthesis for Commercial Product Generation

“…Therefore, the chemical could be used as substrate by other formate consuming bacteria species attached to the biocathode after generation. However, using enzymatic electro-synthesis which uses CO2 like MES, high formic acid productivity has been achieved (Chiranjeevi et al, 2019). Nevin and co-worker showed direct synthesis of formic acid from CO2 in MES at potentials close to its theoretical value (-0.430 vs SHE) (Nevin et al, 2011).…”

Recent advances in the roles of minerals for enhanced microbial extracellular electron transfer

“…Armed with the photocatalysis effect by semimineral substituents, energy efficiencies of biohybrid systems using CO 2 /H 2 O and solar radiation as substrate and an energy source could exceed that of natural photosynthesis. Given the advantage of the abovementioned engineered biohybrids, fuels and chemicals could be synthesized from CO 2 with a high quantum efficiency due to the combination direct enzyme activation and photocatalysis effects in a given biohybrid system [101,109,149]. Thus far, the efficacy of renewable energy, such as hydrogen, methane or other hydrocarbons, has been successfully demonstrated using bioelectro-synthesis from various engineered biohybrids (Table 3).…”

Cadmium sulfide nanoparticles-assisted intimate coupling of microbial and photoelectrochemical processes: Mechanisms and environmental applications

“…Under illumination, carbon dioxide-reducing equivalent ([H]) is generated from photoelectrons (either from outside the cell or by direct electron transport to the cell) concomitant with hole oxidation of cysteine into cystine, enabling the effective separation of photoelectronhole pairs. Subsequently, acetic acid was biosynthesized via the acetyl coenzyme A Wood-Lungdahl pathway where [H] and carbon dioxide are reacted (Chiranjeevi et al, 2019). Thus far, there is a paucity of research regarding carbon dioxide conversion to clean fuels using CdS NP-immobilized biohybrids.…”