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  Electrochemical Surface Oxidation of Copper Studied by in Situ Grazing Incidence X-ray Diffraction

Scherzer, M., Girgsdies, F., Stotz, E., Willinger, M. G., Frei, E., Schlögl, R., et al. (2019). Electrochemical Surface Oxidation of Copper Studied by in Situ Grazing Incidence X-ray Diffraction. The Journal of Physical Chemistry C, 123(21), 13253-13262. doi:10.1021/acs.jpcc.9b00282.

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 Creators:
Scherzer, Michael1, 2, Author              
Girgsdies, Frank1, Author              
Stotz, Eugen1, Author              
Willinger, Marc Georg1, 3, Author              
Frei, Elias1, Author              
Schlögl, Robert1, 2, Author              
Pietsch, Ullrich4, Author
Lunkenbein, Thomas1, Author              
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023874              
3Scientific Center for Optical and Electron Microscopy, ETH Zürich, 8093 Zürich, Switzerland, ou_persistent22              
4Department of Physics, University of Siegen, Siegen, Germany, ou_persistent22              

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 Abstract: Grazing incidence X-ray diffractometry (GIXRD) can deliver integral information on the structure and chemistry of surface near regions, which can be beneficial for functional materials related to interfacial reactions. Here, we present an in situ laboratory GIXRD setup for electrochemical experiments. The method is capable of directly correlating changes of the crystalline surface structure to the electrochemical conditions. It combines cyclovoltametric (CV) and chronoamperometric (CA) curves of crystalline samples, which can be recorded over the entire pH range, with simultaneous GIXRD measurements. The stepwise oxidation of polycrystalline copper in alkaline medium acts as an example to prove the functionality of the setup. In situ GIXRD measurements during CA experiments reveal a stepwise oxidation mechanism of metallic Cu to Cu2+ involving crystalline cuprite (Cu2O) intermediates. The results highlight the importance of conducting in situ experiments under controlled environments in order to track transient states even for a comparable simple oxidation reaction.

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Language(s): eng - English
 Dates: 2019-05-032019-01-102019-05-152019-05-30
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpcc.9b00282
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Title: The Journal of Physical Chemistry C
  Abbreviation : J. Phys. Chem. C
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: 10 Volume / Issue: 123 (21) Sequence Number: - Start / End Page: 13253 - 13262 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766