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Nanoscale membranes that chemically isolate and electronically wire up the abiotic/biotic interface.

Abstract：

:By electrochemically coupling microbial and abiotic catalysts, bioelectrochemical systems such as microbial electrolysis cells and microbial electrosynthesis systems synthesize energy-rich chemicals from energy-poor precursors with unmatched efficiency. However, to circumvent chemical incompatibilities between the microbial cells and inorganic materials that result in toxicity, corrosion, fouling, and efficiency-degrading cross-reactions between oxidation and reduction environments, bioelectrochemical systems physically separate the microbial and inorganic catalysts by macroscopic distances, thus introducing ohmic losses, rendering these systems impractical at scale. Here we electrochemically couple an inorganic catalyst, a SnO2 anode, with a microbial catalyst, Shewanella oneidensis, via a 2-nm-thick silica membrane containing -CN and -NO2 functionalized p-oligo(phenylene vinylene) molecular wires. This membrane enables electron flow at 0.51 μA cm-2 from microbial catalysts to the inorganic anode, while blocking small molecule transport. Thus the modular architecture avoids chemical incompatibilities without ohmic losses and introduces an immense design space for scale up of bioelectrochemical systems.

journal_name

Nat Commun

journal_title

Nature communications

authors

Cornejo JA,Sheng H,Edri E,M Ajo-Franklin C,Frei H

doi

10.1038/s41467-018-04707-6

subject

Has Abstract

pub_date

2018-06-11 00:00:00

pages

2263

issue

1

issn

2041-1723

pii

10.1038/s41467-018-04707-6

journal_volume

9

pub_type

杂志文章

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