Ruthenium Oxide‐Doped TiO2 Nanotubes by Single‐Step Anodization for Water‐Oxidation Applications. Issue 4 (30th December 2014)

• Record Type: Journal Article
• Authors: Yoo, Hyeonseok; Choi, Yong‐Wook; Choi, Jinsub
• Is Part Of: ChemCatChem. Volume 7:Issue 4(2015:Feb.)
• Page Start: 643
• Page End: 647
• Publication Date: 2014-12-30
• Subjects: Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201402787
• Languages: English
• ISSNs: 1867-3880

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Single‐step anodization in NH₄F‐based ethylene glycol electrolyte containing KRuO₄ and H₂O led to the production of high‐aspect‐ratio TiO₂ nanotubes (NTs) with a doping of ruthenium oxide. These NTs were successfully used as electrodes for water oxidation in KOH. This method offers homogenous incor poration of a small amount of ruthenium oxide (≈0.12 wt %) into 25 μm TiO₂ nanotubes without the need for complicated facilities or steps. The addition of H₂O into electrolytes is a key step for the stable adhesion of long‐length TiO₂ NT films on a substrate. The tips of the TiO₂ nanotubes prepared by this novel method are not easily dissolved by electrolyte because the walls of the nanotubes are thickened by a factor of more than two in response to the addition of KRuO₄ and H₂O. The longest nanotubular TiO₂ with a doping of ruthenium oxide and no wall dissolution shows the largest current density in the oxygen‐evolution reaction.</p> </abstract>