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Oxidized mild steel S235: an efficient anode for the electrocatalytically initiated water-splitting

Schäfer, Helmut; Küpper, Karsten; Wollschläger, Joachim; Kashaev, Nikolai; Hardege, Jörg; Walder, Lorenz; Mohsen Beladi-Mousavi, Seyyed; Hartmann-Azanza, Brigitte; Steinhart, Martin; Sadaf, Shamaila; Dorn, Falk

Authors

Helmut Schäfer

Karsten Küpper

Joachim Wollschläger

Nikolai Kashaev

Lorenz Walder

Seyyed Mohsen Beladi-Mousavi

Brigitte Hartmann-Azanza

Martin Steinhart

Shamaila Sadaf

Falk Dorn



Abstract

The surface of steel S235 was oxidized by Cl₂ gas and checked for its electrocatalytic efficiency regarding oxygen formation in aqueous solution. If exposed to humid Cl₂ gas for 110 min, steel S235 became an electrocatalyst that exhibits an overpotential for the oxygen evolution reaction (OER) of 462 mV at 1 mA cm² at pH 7. The OER activity of the same sample at pH 13 was moderate (347 mV overpotential at 2.0 mA cm² current density) in comparison with OER electrocatalysts developed recently. Potential versus time plots measured at a constant current demonstrate the sufficient stability of all samples under catalysis conditions at pH 7 and 13 for tens of hours. High-resolution X-ray photoelectron spectra could be reasonably resolved with the proviso that Fe₂O₃, FeO(OH), MnO(OH), and Mn₂O₃ are the predominant Fe and Mn species on the surface of the oxidized steel S235.

Citation

Schäfer, H., Küpper, K., Wollschläger, J., Kashaev, N., Hardege, J., Walder, L., …Dorn, F. (2015). Oxidized mild steel S235: an efficient anode for the electrocatalytically initiated water-splitting. ChemSusChem, 8(18), 3099-3110. https://doi.org/10.1002/cssc.201500666

Acceptance Date Jun 28, 2015
Online Publication Date Aug 13, 2015
Publication Date Sep 21, 2015
Deposit Date Feb 29, 2016
Publicly Available Date Feb 29, 2016
Journal Chemsuschem
Print ISSN 1864-5631
Electronic ISSN 1864-564X
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 8
Issue 18
Pages 3099-3110
DOI https://doi.org/10.1002/cssc.201500666
Keywords General Energy; General Materials Science; General Chemical Engineering; Environmental Chemistry
Public URL https://hull-repository.worktribe.com/output/411727
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/cssc.201500666/full
Copyright Statement ©2016 University of Hull
Additional Information Authors' accepted manuscript of article : Schäfer, H., Küpper, K., Wollschläger, J., Kashaev, N., Hardege, J., Walder, L., Mohsen Beladi-Mousavi, S., Hartmann-Azanza, B., Steinhart, M., Sadaf, S. and Dorn, F. (2015), Oxidized Mild Steel S235: An Efficient Anode for Electrocatalytically Initiated Water Splitting. ChemSusChem, 8: 3099–3110.

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