Ba0.5Sr0.5Co0.8Fe0.2O3‐δ Perovskite Activity towards the Oxygen Reduction Reaction in Alkaline Media. Issue 2 (12th November 2013)

• Record Type: Journal Article
• Authors: Fabbri, Emiliana; Mohamed, Rhiyaad; Levecque, Pieter; Conrad, Olaf; Kötz, Rüdiger; Schmidt, Thomas J.
• Is Part Of: ChemElectroChem. Volume 1:Issue 2(2014)
• Page Start: 338
• Page End: 342
• Publication Date: 2013-11-12
• Subjects: Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201300157
• Languages: English
• ISSNs: 2196-0216

Abstract

<abstract abstract-type="graphical" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <bold>Perovskite catalysts:</bold> Cyclic voltammograms in Ar‐ and O₂‐saturated KOH reveal that the onset for the oxygen reduction reaction (ORR) occurs at potentials below ∼0.77 V_RHE. Rotating ring‐disk electrode measurements and Koutecky–Levich analysis prove that for Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3‐δ, the ORR does not fully proceed via a four‐electron process, leading to the parallel formation of OH⁻ and HO₂⁻ (see picture).<boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgg4smq3dwz" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>