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Stability of nanostructured iridium oxide electrocatalysts during oxygen evolution reaction in acidic environment

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Nov 2014Publisher:Elsevier BVJournal:Electrochemistry Communications, volume 48, pages 81-85 (issn: 1388-2481,

Authors: Serhiy Cherevko; Zarina Pawolek; Karl Johann Jakob Mayrhofer; Peter Strasser; Aleksandar R. Zeradjanin; Tobias Reier;

doi: 10.1016/j.elecom.2014.08.027

Stability of nanostructured iridium oxide electrocatalysts during oxygen evolution reaction in acidic environment

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Abstract

AbstractThe electrochemical stability of thermally prepared Ir oxide films is investigated using a scanning flow cell (SFC)–inductively coupled plasma mass-spectrometer (ICP-MS) setup under transient and stationary potential and/or current conditions. Time-resolved dissolution rates provide important insights into critical conditions for material breakdown and a fully quantitative in-situ assessment of the electrochemical stability during oxygen evolution reaction (OER) conditions. In particular, the results demonstrate that stability and OER activity of the IrOx catalysts strongly depend on the chemical and structural nature of Ir oxide species and their synthesis conditions.

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Keywords

IrO2, Energy conversion, Corrosion, Iridium oxide, Electrochemistry, Oxygen evolution, Dissolution

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