Anodic Formation of Self-Organized Cobalt Oxide Nanoporous Layers

Authors

  • Dr. Chong-Yong Lee,

    1. Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany)
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  • Kiyoung Lee,

    1. Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany)
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  • Prof. Dr. Patrik Schmuki

    Corresponding author
    1. Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany)
    • Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany)
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  • We acknowledge the financial support from the DFG and the DFG cluster of excellence (EAM). Helga Hildebrand and Dr. Matthias Moll are acknowledged for the X-ray photoelectron spectroscopy and oxygen measurements, respectively.

Abstract

original image

Nanoporous materials: High-aspect-ratio, ordered porous Co3O4 layers were formed by self-organizing anodization of a cobalt substrate and subsequent annealing. The key for successful formation of such layers is to sufficiently suppress competing oxygen evolution during anodization. The aligned Co3O4 channel layers behave as a highly efficient water oxidation catalyst (see picture).

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