High-Performance Oxygen Redox Catalysis with Multifunctional Cobalt Oxide Nanochains: Morphology-Dependent Activity

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Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623 Berlin, Germany
Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
§ Department of Chemistry, The Electrochemical Energy, Catalysis, and Materials Science Group, Technische Universität Berlin, Straße des 17 Juni 124, Sekr. TC3, 10623 Berlin, Germany
# Ertl Center for Electrochemistry and Catalysis, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea
*E-mail for P.S.: [email protected]
*E-mail for H.D.: [email protected]
*E-mail for M.D.: [email protected]
Cite this: ACS Catal. 2015, 5, 4, 2017–2027
Publication Date (Web):February 16, 2015
Copyright © 2015 American Chemical Society
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Future advances in renewable and sustainable energy require advanced materials based on earth-abundant elements with multifunctional properties. The design and the development of cost-effective, robust, and high-performance catalysts that can convert oxygen to water, and vice versa, is a major challenge in energy conversion and storage technology. Here we report cobalt oxide nanochains as multifunctional catalysts for the electrochemical oxygen evolution reaction (OER) at both alkaline and neutral pH, oxidant-driven, photochemical water oxidation in various pH, and the electrochemical oxygen reduction reaction (ORR) in alkaline medium. The cobalt oxide nanochains are easily accessible on a multigram scale by low-temperature degradation of a cobalt oxalate precursor. What sets this study apart from earlier ones is its synoptical perspective of reversible oxygen redox catalysis in different chemical and electrochemical environments.

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The following file is available free of charge on the ACS Publications website at DOI: 10.1021/cs501724v.

  • PXRD patterns, EDX spectra, ICP-AES analyses, IR spectra, Raman spectra, thermal analysis, TPR, SEM, TEM, BET, and XPS, all plots concerning oxidant-driven, photochemical, and electrochemical OER and ORR and characterizations after the electrochemical measurements (PDF)

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