Abstract
An electrochemical steel corrosion process to generate the iron-only oxygen evolution catalyst mössbauerite with earth-abundant and non-hazardous materials is described.
Highlights
Cheap and scalable anodes for the oxygen evolution reaction (OER) are highly sought-after since noble metal oxides are considered unsuitable due to dissolution, high production price, and catalyst material maintenance.[6]
The materials subjected to chemical (GR*ChOx) and electrochemical oxidation (GR*ElOx) allowed obtaining a current density of 100 mA cmÀ2 at 1.82 V and 1.84 V, respectively, improving the electrocatalytic capabilities and outperforming the bare steel substrate operated in 1 M KOH solutions
The previously deposited green rust (GR) on the steel substrate was subjected to electrochemical oxidation (GR*ElOx) via cyclic voltammetry in the range of 1.10–1.47 V vs. RHE
Summary
Cheap and scalable anodes for the OER are highly sought-after since noble metal oxides are considered unsuitable due to dissolution, high production price, and catalyst material maintenance.[6]. The materials subjected to chemical (GR*ChOx) and electrochemical oxidation (GR*ElOx) allowed obtaining a current density of 100 mA cmÀ2 at 1.82 V and 1.84 V, respectively, improving the electrocatalytic capabilities and outperforming the bare steel substrate operated in 1 M KOH solutions.
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