Perfluorocarbon nanoemulsion promotes the delivery of reducing equivalents for electricity-driven microbial CO2 reduction

Semi-biological approaches to solar-to-chemical conversion

“…A recent study shows that this bottleneck can be alleviated by introducing perfluorocarbon nanoemulsions as biocompatible H 2 carriers to increase the H 2 availability around cells, accelerate the H 2 transfer and thereby improve the productivity of CO 2 reduction. 244…”

Material–Microbe Interfaces for Solar-Driven CO2 Bioelectrosynthesis

“…CdS photosensitized Thiobacillus denitrificans [60,61]. The mechanism suggested that the photogenerated electrons from CdS were transferred to T. denitrificans via membrane-bound proteins such as quinols and cytochrome C. During continuous photocatalytic NO 3 − reduction, no dissolution of Cd 2+ ion was observed in the reaction medium, indicating that Cd 2+ ions may be readily captured and reused for the biomineralization of CdS.…”

“…The efficiency of biohybrid systems is limited by the low solubility of mediators like H 2 , which deliver reducing equivalents from the surface of the electrode to the targeted microbes. In this context, Rodrigues and colleagues inserted a biocompatible perfluorocarbon nanoemulsion as a H 2 carrier to a biohybrid system and increased the activity of CO 2 reduction to acetic acid by 190% [61]. For instance, an experiment with S. ovata showed an acetate production of 107 mM with 100% Faradaic efficiency.…”

Microbial electro-fermentation for synthesis of chemicals and biofuels driven by bi-directional extracellular electron transfer

“…However, the low solubility of H 2 in water may decreased the efficiency of electron transfer flow from water-splitting to CO 2 fixation [ 63 ]. To alleviate this bottleneck, Rodrigues et al recently introduced a biocompatible perfluorocarbon nanoemulsion as a H 2 carrier and improved faradaic efficiency of CO 2 reduction in S. ovata [ 64 ]. Besides, formate could be applied as a soluble and safe replacement for H 2 in MES systems, which could be oxidized to CO 2 in turn and generate NADH.…”