In-situ observation of oxygen adlayer formation on Cu(110) electrode surfaces

John R. LaGraff, Andrew A. Gewirth

Research output: Contribution to journalArticle

Abstract

In-situ atomic force microscopy (AFM) was used to image Cu(110) single crystals in aqueous solutions during the initial stages of oxidation. Images obtained in pH 2.5-2.7 HClO4 and H2SO4 solutions revealed the growth of oxygen adlayers consisting primarily of [001] oriented chains. A majority of these chains (ca. 70%) were arranged in (2 × 1) and (3 × 1) structures. These chain structures were observed in the thermodynamically forbidden region of the pH-potential phase diagram, which indicates that stable oxygen adlayers develop prior to bulk oxide formation.

Original languageEnglish (US)
Pages (from-to)L461-L466
JournalSurface Science
Volume326
Issue number3
DOIs
StatePublished - Mar 20 1995

Keywords

  • Adatoms
  • Atomic force microscopy
  • Copper
  • Metal-electrolyte interfaces
  • Solid-liquid interfaces
  • Surface structure
  • Surface thermodynamics

ASJC Scopus subject areas

  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry

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