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  On the faradaic selectivity and the role of surface inhomogeneity during the chlorine evolution reaction on ternary Ti–Ru–Ir mixed metal oxide electrocatalysts

Žeradjanin, A. R., Menzel, N., Schuhmann, W., & Strasser, P. (2014). On the faradaic selectivity and the role of surface inhomogeneity during the chlorine evolution reaction on ternary Ti–Ru–Ir mixed metal oxide electrocatalysts. Physical Chemistry Chemical Physics, 16(27), 13741-13747. doi:10.1039/c4cp00896k.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-A0E4-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-A0E5-C
Genre: Journal Article

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 Creators:
Žeradjanin, Aleksandar R.1, 2, Author              
Menzel, Nadine3, 4, Author              
Schuhmann, Wolfgang5, Author              
Strasser, Peter6, 7, Author              
Affiliations:
1Analytical Chemistry, Center for Electrochemical Sciences-CES, Ruhr-Universität Bochum, Universitätsstr. 150, D-44780 Bochum, Germany, ou_persistent22              
2Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
3Electrochemical Energy, Catalysis and Material Science Laboratory, Technical University Berlin, Straße des 17. Juni 124, D-10623 Berlin, Germany, ou_persistent22              
4Fraunhofer Institute for Mechanics of Materials IWM, Walter-Huelse-Straße 1, D-06120 Halle, Germany, ou_persistent22              
5Analytische Chemie – Elektroanalytik & Sensorik, Ruhr-Universität Bochum, 44780 Bochum, Germany, ou_persistent22              
6Department of Chemistry, Technical University Berlin, Straße des 17., Berlin, Germany , ou_persistent22              
7Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: Dimensionally Stable Anodes; Oxygen Evolution; Water Oxidation; Electrodes; Performance; Morphology; Behavior; Films;
 Abstract: The faradaic selectivity of the chlorine evolution reaction (CER) and oxygen evolution reaction (OER) on the industrially important Ti-Ru-Ir mixed metal oxide is discussed. Absolute evolution rates as well as volume fractions of Cl-2 and O-2 were quantified using differential electrochemical mass spectrometry (DEMS), while the catalyst surface redox behavior was analyzed using cyclic voltammetry. The spatial inhomogeneity of the surface catalytic reaction rate was probed using Scanning Electrochemical Microscopy (SECM). Although the nature of the competition between electrochemical discharging of chloride ions and water molecules remains elusive on a molecular scale, new insights into the spatial reactivity distribution of the CER and OER were obtained. Oxidation of water is the initial step in corrosion and concomitant deactivation of the oxide electrodes; however, at the same time the nature of interaction between the oxide surface and water is used as a rational indicator of selectivity and catalytic activity. An experimental procedure was established that would allow the study of selectivity of a variety of different catalyst materials using polycrystalline electrode surfaces.

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Language(s): eng - English
 Dates: 2014
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000338116700023
DOI: 10.1039/c4cp00896k
 Degree: -

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Title: Physical Chemistry Chemical Physics
  Abbreviation : Phys. Chem. Chem. Phys.
Source Genre: Journal
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Publ. Info: Cambridge, England : Royal Society of Chemistry
Pages: - Volume / Issue: 16 (27) Sequence Number: - Start / End Page: 13741 - 13747 Identifier: ISSN: 1463-9076
CoNE: /journals/resource/954925272413_1