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Yixin Zhao, Nella M. Vargas-Barbosa, Emil A. Hernandez-Pagan and Thomas E. Mallouk Anodic Deposition of Colloidal Iridium Oxide Thin Films from Hexahydroxyiridate(IV) Solutions Small 7

Version of Record online: 16 JUN 2011 | DOI: 10.1002/smll.201100485

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The facile anodic deposition of colloidal iridium oxide (IrOx·nH2O) thin films from [Ir(OH)6]2− solutions is described. The stable IrOx·nH2O nanoparticle films exhibit the lowest-reported overpotential, 0.20 V at 1.5 mA cm−2 current density, for the oxygen evolution reaction (OER) and have an exchange current density for the OER of 4–8 × 10−10 A cm −2 at a 4 mC cm−2 coverage of electroactive Ir.

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