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Scalable Three-Dimensional Photobioelectrodes Made of Reduced Graphene Oxide Combined with Photosystem I

  • Photobioelectrodes represent one of the examples where artificial materials are combined with biological entities to undertake semi-artificial photosynthesis. Here, an approach is described that uses reduced graphene oxide (rGO) as an electrode material. This classical 2D material is used to construct a three-dimensional structure by a template-based approach combined with a simple spin-coating process during preparation. Inspired by this novel material and photosystem I (PSI), a biophotovoltaic electrode is being designed and investigated. Both direct electron transfer to PSI and mediated electron transfer via cytochrome c from horse heart as redox protein can be confirmed. Electrode preparation and protein immobilization have been optimized. The performance can be upscaled by adjusting the thickness of the 3D electrode using different numbers of spin-coating steps during preparation. Thus, photocurrents up to ∼14 μA/cm2 are measured for 12 spin-coated layers of rGO corresponding to a turnover frequency of 30 e– PSI–1 s–1 and external quantum efficiency (EQE) of 0.07% at a thickness of about 15 μm. Operational stability has been analyzed for several days. Particularly, the performance at low illumination intensities is very promising (1.39 μA/cm2 at 0.1 mW/cm2 and −0.15 V vs Ag/AgCl; EQE 6.8%).

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Metadaten
Author:Sascha MorlockORCiD, Senthil Kumar Subramanian, Athina ZouniORCiD, Fred LisdatORCiDGND
URN:urn:nbn:de:kobv:526-opus4-16760
DOI (Version of Record):https://doi.org/10.1021/acsami.1c01142
Parent Title (English):ACS Applied Materials & Interfaces
Publisher:American Chemical Society (ACS)
Document Type:Article
Language:English
Year of Publication:2021
Publishing Institution:Technische Hochschule Wildau
Release Date:2022/11/29
Tag:3D electrode structure; biophotovoltaics; carbon material; reduced graphene oxide (rGO); scalable template process; spin-coating
Volume:13
Issue:9
First Page:11237
Last Page:11246
Source:Morlock, S., Subramanian, S. K., Zouni, A., & Lisdat, F. (2021). Scalable Three-Dimensional Photobioelectrodes Made of Reduced Graphene Oxide Combined with Photosystem I. ACS Applied Materials & Interfaces, 13(9), 11237–11246. doi:10.1021/acsami.1c01142
Copyright:This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © 2021 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/abs/10.1021/acsami.1c01142.
Faculties an central facilities:Fachbereich Ingenieur- und Naturwissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 572 Biochemie
Licence (German):Das Dokument ist urheberrechtlich geschützt
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