Interface Controlled Oxidation States in Layered Cobalt Oxide Nanoislands on Gold

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  • Alexander Walton, Denmark
  • Jakob Fester, Denmark
  • Michal Bajdich, SUNCAT Center for Interface Science and Catalysis, Denmark
  • M.A. Arman, Lund University, Denmark
  • Jacek Osiecki, University of Lund, Lund, Denmark
  • Jan Knudsen, Denmark
  • Aleksandra Vojvodic, SUNCAT Center for Interface Science and Catalysis, Denmark
  • Jeppe Vang Lauritsen
Layered cobalt oxides have been shown to be highly active catalysts for the oxygen evolution reaction (OER; half of the catalytic “water splitting” reaction), particularly when promoted with gold. However, the surface chemistry of cobalt oxides and in particular the nature of the synergistic effect of gold contact are only understood on a rudimentary level, which at present prevents further exploration. We have synthesized a model system of flat, layered cobalt oxide nanoislands supported on a single crystal gold (111) substrate.
Original languageEnglish
JournalACS Nano
Pages (from-to)2445-2453
Number of pages8
Publication statusPublished - 18 Feb 2015

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