Soft X-ray spectromicroscopic proof of a reversible oxidation/reduction of microbial biofilm structures using a novel microfluidic in situ electrochemical device

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008011
URN to cite this document: urn:nbn:de:bvb:703-epub-8011-5

Title data

Ingino, Pablo ; Eraky, Haytham ; Zhang, Chunyang ; Hitchcock, Adam P. ; Obst, Martin:
Soft X-ray spectromicroscopic proof of a reversible oxidation/reduction of microbial biofilm structures using a novel microfluidic in situ electrochemical device.
In: Scientific Reports. Vol. 14 (2024) Issue 1 . - 24009.
ISSN 2045-2322
DOI der Verlagsversion: https://doi.org/10.1038/s41598-024-74768-9

	Format: PDF Name: s41598-024-74768-9.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Project information

Project title:	Project's official title Project's id Open Access Publizieren No information
Project financing:	Deutsche Forschungsgemeinschaft

Abstract

In situ electrochemistry on micron and submicron-sized individual particles and thin layers is a valuable, emerging tool for process understanding and optimization in a variety of scientific and technological fields such as material science, process technology, analytical chemistry, and environmental sciences. Electrochemical characterization and manipulation coupled with soft X-ray spectromicroscopy helps identify, quantify, and optimize processes in complex systems such as those with high heterogeneity in the spatial and/or temporal domain. Here we present a novel platform optimized for in situ electrochemistry with variable liquid electrolyte flow in soft X-ray scanning transmission X-ray microscopes (STXM). With four channels for fluid control and a modular design, it is suited for a wealth of experimental conditions. We demonstrate its capabilities by proving the reversible oxidation and reduction of individual microbial biofilm structures formed by microaerophilic Fe(II)-oxidizing bacteria, also known as twisted stalks. We show spectromicroscopically the heterogeneity of the redox activity on the submicron scale. Examples are also provided of electrochemical modification of liquid electrolyte species (Fe(II) and Fe(III) cyanides), and in situ studies of electrodeposited copper nanoparticles as CO₂ reduction electrocatalysts under reaction conditions.

Further data

Item Type:	Article in a journal
Keywords:	In situ liquid phase electrochemistry; Soft X-ray spectromicroscopy; STXM; Electrochemistry; K₂Fe(CN)₆; K₃Fe(CN)₆; CO₂ reduction catalyst; Fe(II)-oxidizing bacteria
DDC Subjects:	500 Science > 550 Earth sciences, geology
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor - Experimental Biogeochemistry > Professor Experimental Biogeochemistry - Univ.-Prof. Dr. Martin Obst Research Institutions > Central research institutes > Bayreuth Center of Ecology and Environmental Research- BayCEER Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor - Experimental Biogeochemistry Research Institutions Research Institutions > Central research institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8011-5
Date Deposited:	16 Oct 2024 08:48
Last Modified:	17 Oct 2024 05:02
URI:	https://epub.uni-bayreuth.de/id/eprint/8011

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