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  Electrochemistry in ultra-high vacuum: The fully transferrable ultra-high vacuum compatible electrochemical cell

Kerger, P., Vogel, D., & Rohwerder, M. (2018). Electrochemistry in ultra-high vacuum: The fully transferrable ultra-high vacuum compatible electrochemical cell. Review of Scientific Instruments, 89(11): 113102. doi:10.1063/1.5046389.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-CF63-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-CF64-5
Genre: Journal Article

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 Creators:
Kerger, Philipp1, Author              
Vogel, Dirk1, Author              
Rohwerder, Michael1, Author              
Affiliations:
1Corrosion, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2074315              

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Free keywords: Electrochemistry; Electrodes; Graphene; Hydrogen; Modular construction; Palladium compounds; Redox reactions; Silicon nitride; X ray absorption spectroscopy; X ray photoelectron spectroscopy, Applied potentials; Electrochemical redox reactions; Electron exchange; Long term stability; Reference electrodes; Sample preparation; Solid/liquid interfaces; Working electrode, Ultrahigh vacuum
 Abstract: A new experimental setup for in situ/operando investigations of redox reactions is introduced. This setup, in combination with ultra-high vacuum (UHV) methods from the field of surface science, provides completely new possibilities to investigate electrochemical redox reactions. Two types of cells are distinguished conceptionally: in the permeation configuration, the working electrode is electrochemically polarised on one side of a membrane (entry side), leading to atomic hydrogen uptake, and allowing proton and electron exchange between the entry and the other side (exit side) of the membrane. Here it is found that the applied potential on the entry side shows a 1:1 correlation with the measured potential on the exit side. The concept of the "window" cell requires ultra-thin, electron transparent "windows," such as single layer graphene, for X-ray photoelectron spectroscopy or X-ray transparent silicon nitride "windows" for X-ray absorption spectroscopy. In this case, the solid/liquid interface can be directly probed under applied potentials. In both configurations, the applied potential is measured with a palladium hydride reference electrode, with so far unseen precision and long-term stability. The cell design is constructed with regard to transferability within a UHV system, allowing sample preparation, and a modular construction, allowing a straightforward changeover between these two configurations. As a first application, an approach based on atomic hydrogen is presented. Further application concepts are discussed. The setup functionality is demonstrated by the example of in situ/operando investigation of the palladium oxide reduction. © 2018 Author(s).

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Language(s): eng - English
 Dates: 2018-11-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.5046389
 Degree: -

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Title: Review of Scientific Instruments
  Abbreviation : Rev. Sci. Instrum.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Melville, NY : AIP Publishing
Pages: - Volume / Issue: 89 (11) Sequence Number: 113102 Start / End Page: - Identifier: ISSN: 0034-6748
CoNE: https://pure.mpg.de/cone/journals/resource/991042742033452