Oxidized Mild Steel S235: An Efficient Anode for Electrocatalytically Initiated Water Splitting. Issue 18 (13th August 2015)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: ChemSusChem. Volume 8:Issue 18(2015:Sep.)
• Page Start: 3099
• Page End: 3110
• Publication Date: 2015-08-13
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201500666
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 cm⁻² at pH 7. The OER activity of the same sample at pH 13 was moderate (347 mV overpotential at 2.0 mA cm⁻² 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.</p> </abstract>