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  Standardized Benchmarking of Water Splitting Catalysts in a Combined Electrochemical Flow Cell/Inductively Coupled Plasma–Optical Emission Spectrometry (ICP-OES) Setup

Spanos, I., Auer, A. A., Neugebauer, S., Deng, X., Tüysüz, H., & Schlögl, R. (2017). Standardized Benchmarking of Water Splitting Catalysts in a Combined Electrochemical Flow Cell/Inductively Coupled Plasma–Optical Emission Spectrometry (ICP-OES) Setup. ACS Catalysis, 7(6), 3768-3778. doi:10.1021/acscatal.7b00632.

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 Creators:
Spanos, Ioannis1, Author
Auer, Alexander A.2, Author              
Neugebauer, Sebastian1, Author
Deng, Xiaohui3, Author              
Tüysüz, Harun3, Author              
Schlögl, Robert1, Author              
Affiliations:
1Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, Muelheim an der Ruhr, 45470, Germany, ou_persistent22              
2Department of Molecular Theory and Spectroscopy, Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, Muelheim an der Ruhr, 45470, Germany, ou_persistent22              
3Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              

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Free keywords: catalyst benchmarking; electrochemical flow cell; electrochemistry; faradaic efficiency; ICP-OES; oxygen evolution
 Abstract: The oxygen evolution reaction (OER) is the limiting step in splitting water into its constituents, hydrogen and oxygen. Hence, research on potential OER catalysts has become the focus of many studies. In this work, we investigate capable OER catalysts but focus on catalyst stability, which is, especially in this case, at least equally as important as catalyst activity. We propose a specialized setup for monitoring the corrosion profiles of metal oxide catalysts during a stability testing protocol, which is specifically designed to standardize the investigation of OER catalysts by means of differentiating between catalyst corrosion and deactivation, oxygen evolution efficiency, and catalyst activity. For this purpose, we combined an electrochemical flow cell (EFC) with an oxygen sensor and an inductively coupled plasma–optical emission spectrometry (ICP-OES) system for the simultaneous investigation of catalyst deactivation, activity, and faradaic efficiency of catalysts. We tested various catalysts, with IrO2 and NiCoO2 used as benchmark materials in acidic and alkaline environment, respectively. The scalability of our setup will allow the user to investigate catalytic materials with supports of higher surface area than those which are typical for microelectrochemical flow cells (thus, under conditions more similar to those of commercial electrolyzers).

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Language(s): eng - English
 Dates: 2017-02-252017-04-272017-06-02
 Publication Status: Published online
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acscatal.7b00632
 Degree: -

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Title: ACS Catalysis
  Abbreviation : ACS Catal.
Source Genre: Journal
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Publ. Info: Washington, DC : ACS
Pages: - Volume / Issue: 7 (6) Sequence Number: - Start / End Page: 3768 - 3778 Identifier: ISSN: 2155-5435
CoNE: https://pure.mpg.de/cone/journals/resource/2155-5435