Abstract
Abstract Iridium nanodendrites were synthesized using tetradecyltrimethyl ammonium bromide (TTAB) as an organic capping agent, and the electrocatalytic activity toward oxygen evolution reaction (OER) was evaluated. X-ray photoelectron spectroscopy revealed that an anodically grown iridium oxide film was created on the Ir dendrite through a repeated potential sweep between 0.04 and 1.54 V vs. SHE. The highly branched structure of the Ir dendrites with a particle size of ~ 10 nm provides an increased active facet area that is available for OER in comparison to a commercial Ir catalyst, resulting in enhanced activity toward OER.
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