Reconstruction and electrochemical oxidation of Au(110) surface in 0.1 M H2SO4

Koji Yoshida, Akiyoshi Kuzume, Peter Broekmann, Ilya V. Pobelov, Thomas Wandlowski

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    Variations of the surface structure and composition of the Au(110) electrode during the formation/lifting of the surface reconstruction and during the surface oxidation/reduction in 0.1 M aqueous sulfuric acid were studied by cyclic voltammetry, scanning tunneling microscopy and shell-isolated nanoparticle enhanced Raman spectroscopy. Annealing of the Au(110) electrode leads to a thermally-induced reconstruction formed by intermixed (1×3) and (1×2) phases. In a 0.1 M H2SO4 solution, the decrease of the potential of the atomically smooth Au(110)-(1×1) surface leads to the formation of a range of structures with increasing surface corrugation. The electrochemical oxidation of the Au(110) surface starts by the formation of anisotropic atomic rows of gold oxide. At higher potentials we observed a disordered structure of the surface gold oxide, similar to the one found for the Au(111) surface.

    Original languageEnglish
    Pages (from-to)281-288
    Number of pages8
    JournalElectrochimica Acta
    Volume139
    DOIs
    Publication statusPublished - 2014 Sep 1

    Keywords

    • Au(110)
    • Electrochemical scanning tunneling spectroscopy
    • SHINERS
    • Surface oxidation
    • Surface reconstruction

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Electrochemistry

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