Light-induced formation of partially reduced oxygen species limits the lifetime of photosystem 1-based biocathodes

Fangyuan Zhao, Steffen Hardt, Volker Hartmann, Huijie Zhang, Marc M. Nowaczyk, Matthias Rögner, Nicolas Plumeré, Wolfgang Schuhmann () and Felipe Conzuelo ()
Additional contact information
Fangyuan Zhao: Ruhr-Universität Bochum
Steffen Hardt: Ruhr-Universität Bochum
Volker Hartmann: Ruhr-Universität Bochum
Huijie Zhang: Ruhr-Universität Bochum
Marc M. Nowaczyk: Ruhr-Universität Bochum
Matthias Rögner: Ruhr-Universität Bochum
Nicolas Plumeré: Ruhr-Universität Bochum
Wolfgang Schuhmann: Ruhr-Universität Bochum
Felipe Conzuelo: Ruhr-Universität Bochum

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Interfacing photosynthetic proteins specifically photosystem 1 (PS1) with electrodes enables light-induced charge separation processes for powering semiartificial photobiodevices with, however, limited long-term stability. Here, we present the in-depth evaluation of a PS1/Os-complex-modified redox polymer-based biocathode by means of scanning photoelectrochemical microscopy. Focalized local illumination of the bioelectrode and concomitant collection of H2O2 at the closely positioned microelectrode provide evidence for the formation of partially reduced oxygen species under light conditions. Long-term evaluation of the photocathode at different O2 concentrations as well as after incorporating catalase and superoxide dismutase reveals the particularly challenging issue of avoiding the generation of reactive species. Moreover, the evaluation of films prepared with inactivated PS1 and free chlorophyll points out additional possible pathways for the generation of oxygen radicals. To avoid degradation of PS1 during illumination and hence to enhance the long-term stability, the operation of biophotocathodes under anaerobic conditions is indispensable.

Date: 2018
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-018-04433-z Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04433-z

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-04433-z

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().