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  Self-activation of copper electrodes during CO electro-oxidation in alkaline electrolyte

Auer, A., Andersen, M., Werning, E.-M., Hörmann, N. G., Buller, N., Reuter, K., et al. (2020). Self-activation of copper electrodes during CO electro-oxidation in alkaline electrolyte. Nature Catalysis. doi:10.1038/s41929-020-00505-w.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-FF41-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-FF42-1
Genre: Journal Article

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 Creators:
Auer, Andrea1, Author
Andersen, Mie2, Author
Werning, Eva-Maria1, Author
Hörmann, Nicolas G.2, Author
Buller, Nico1, Author
Reuter, Karsten2, 3, Author              
Kunze-Liebhäuser, Julia1, Author
Affiliations:
1Department of Physical Chemistry, University of Innsbruck, Innsbruck, Austria, ou_persistent22              
2Chair of Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Garching, Germany, ou_persistent22              
3Theory, Fritz Haber Institute, Max Planck Society, ou_634547              

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 Abstract: The development of low-temperature fuel cells for clean energy production is an appealing alternative to fossil-fuel technologies. CO is a key intermediate in the electro-oxidation of energy carrying fuels and, due to its strong interaction with state-of-the-art Pt electrodes, it is known to act as a poison. Here we demonstrate the ability of Earth-abundant Cu to electro-oxidize CO effi-ciently in alkaline media, reaching high current densities of ≥0.35 mA cm−2 on single-crystal Cu(111) model catalysts. Strong and continuous surface structural changes are observed under reaction conditions. Supported by first-principles microkinetic modelling, we show that the concomitant presence of high-energy undercoordinated Cu structures at the surface is a prereq-uisite for the high activity. Similar CO-induced self-activation has been reported for gas–surface reactions at coinage metals, demonstrating the strong parallels between heterogeneous thermal catalysis and heterogeneous electrocatalysis.

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Language(s): eng - English
 Dates: 2020-04-212020-07-292020-09-07
 Publication Status: Published online
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41929-020-00505-w
 Degree: -

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Title: Nature Catalysis
  Abbreviation : Nat. Catal.
Source Genre: Journal
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Publ. Info: New York : Nature Publishing Group
Pages: 10 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 25201158
CoNE: https://pure.mpg.de/cone/journals/resource/25201158