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Interfacing Iodine‐Doped Hydrothermally Carbonized Carbon with Escherichia coli through an “Add‐on” Mode for Enhanced Light‐Driven Hydrogen Production

Interfacing Iodine‐Doped Hydrothermally Carbonized Carbon with Escherichia coli through an... The recently emerged photosynthetic biohybrid systems (PBSs) integrate the advantages of the light‐harvesting ability of semiconductors and the catalytic power of biological metabolism. Herein, negatively charged iodine‐doped hydrothermally carbonized carbon (I‐HTCC) is interfaced with surface modified Escherichia coli cells through a facile “add‐on” mode via electrostatic interactions. As a result of the photoexcited electrons, the self‐assembled I‐HTCC@E. coli biohybrid shows enhanced hydrogen production efficiency with a quantum efficiency of 9.11% under irradiation. The transduction of photoelectrons from I‐HTCC to cells is the rate‐limiting step for H2 production and is delivered through both direct injection and the NADH/NAD+‐mediated pathways. The injected photoelectrons fine‐tune the H2 production through the formate and NADH pathways in a subtle manner. The excellent biocompatibility and photostability of the I‐HTCC@E. coli biohybrid demonstrate its potential real‐world application under sunlight. In addition, the proposed “add‐on” mode is extended to a series of negatively charged common carbon‐based materials with different levels of promotion effects compared with that of pure bacterial cultures. This facile and effective mode provides an insight into the rational design of the whole‐cell PBSs with various semiconductors for H2 production. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Energy Materials Wiley

Interfacing Iodine‐Doped Hydrothermally Carbonized Carbon with Escherichia coli through an “Add‐on” Mode for Enhanced Light‐Driven Hydrogen Production

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References (50)

Publisher
Wiley
Copyright
© 2021 Wiley‐VCH GmbH
ISSN
1614-6832
eISSN
1614-6840
DOI
10.1002/aenm.202100291
Publisher site
See Article on Publisher Site

Abstract

The recently emerged photosynthetic biohybrid systems (PBSs) integrate the advantages of the light‐harvesting ability of semiconductors and the catalytic power of biological metabolism. Herein, negatively charged iodine‐doped hydrothermally carbonized carbon (I‐HTCC) is interfaced with surface modified Escherichia coli cells through a facile “add‐on” mode via electrostatic interactions. As a result of the photoexcited electrons, the self‐assembled I‐HTCC@E. coli biohybrid shows enhanced hydrogen production efficiency with a quantum efficiency of 9.11% under irradiation. The transduction of photoelectrons from I‐HTCC to cells is the rate‐limiting step for H2 production and is delivered through both direct injection and the NADH/NAD+‐mediated pathways. The injected photoelectrons fine‐tune the H2 production through the formate and NADH pathways in a subtle manner. The excellent biocompatibility and photostability of the I‐HTCC@E. coli biohybrid demonstrate its potential real‐world application under sunlight. In addition, the proposed “add‐on” mode is extended to a series of negatively charged common carbon‐based materials with different levels of promotion effects compared with that of pure bacterial cultures. This facile and effective mode provides an insight into the rational design of the whole‐cell PBSs with various semiconductors for H2 production.

Journal

Advanced Energy MaterialsWiley

Published: Jun 1, 2021

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