A Three-dimensional Hybrid Electrode with Electroactive Microbes for Efficient Electrogenesis and Chemical Synthesis

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2020 Feb 14

PMID 32051251

Citations 13

Authors

Xin Fang

Shafeer Kalathil

Giorgio Divitini

Qian Wang

Erwin Reisner

Affiliations

Soon will be listed here.

Abstract

Integration of electroactive bacteria into electrodes combines strengths of intracellular biochemistry with electrochemistry for energy conversion and chemical synthesis. However, such biohybrid systems are often plagued with suboptimal electrodes, which limits the incorporation and productivity of the bacterial colony. Here, we show that an inverse opal-indium tin oxide electrode hosts a large population of current-producing and attains a current density of 3 mA cm stemming from bacterial respiration. Differential gene expression analysis revealed 's transcriptional regulations to express more electron-relaying proteins when interfaced with electrodes. The electrode also allows coculturing with for syntrophic electrogenesis, which grants the system additional flexibility in converting electron donors. The biohybrid electrode containing can also catalyze the reduction of soluble fumarate and heterogenous graphene oxide, with electrons from an external power source or an irradiated photoanode. This biohybrid electrode represents a platform to employ live cells for sustainable power generation and biosynthesis.

Citing Articles

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