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  Catalyst Stability Benchmarking for the Oxygen Evolution Reaction: The Importance of Backing Electrode Material and Dissolution in Accelerated Aging Studies

Geiger, S., Kasian, O., Mingers, A. M., Nicley, S. S., Haenen, K., Mayrhofer, K. J. J., et al. (2017). Catalyst Stability Benchmarking for the Oxygen Evolution Reaction: The Importance of Backing Electrode Material and Dissolution in Accelerated Aging Studies. ChemSusChem, 10(21), 4140-4143. doi:10.1002/cssc.201701523.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-806D-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-806E-8
Genre: Journal Article

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 Creators:
Geiger, Simon1, Author              
Kasian, Olga1, Author              
Mingers, Andrea M.1, Author              
Nicley, Shannon S.2, Author              
Haenen, Ken2, Author              
Mayrhofer, Karl J. J.1, 3, 4, Author              
Cherevko, Serhiy1, 3, Author              
Affiliations:
1Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
2Institute for Materials Research (IMO), Hasselt University, &, IMOMEC, IMEC vzw, Diepenbeek, Belgium, persistent22              
3Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany, ou_persistent22              
4Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany , ou_persistent22              

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Free keywords: GLASSY-CARBON ELECTRODES; WATER ELECTROLYSIS; ELECTROCATALYSTS; OXIDATION; EFFICIENT; DEGRADATION; ACTIVATION; SUPPORTS; ANODES; MEDIAChemistry; Science & Technology - Other Topics; boron doped diamond; dissolution; glassy carbon; oxygen evolution reaction; stability protocols;
 Abstract: In searching for alternative oxygen evolution reaction (OER) catalysts for acidic water splitting, fast screening of the material intrinsic activity and stability in half-cell tests is of vital importance. The screening process significantly accelerates the discovery of new promising materials without the need of time-consuming real-cell analysis. In commonly employed tests, a conclusion on the catalyst stability is drawn solely on the basis of electrochemical data, for example, by evaluating potential-versus-time profiles. Herein important limitations of such approaches, which are related to the degradation of the backing electrode material, are demonstrated. State-of-the-art Ir-black powder is investigated for OER activity and for dissolution as a function of the backing electrode material. Even at very short time intervals materials like glassy carbon passivate, increasing the contact resistance and concealing the degradation phenomena of the electrocatalyst itself. Alternative backing electrodes like gold and boron-doped diamond show better stability and are thus recommended for short accelerated aging investigations. Moreover, parallel quantification of dissolution products in the electrolyte is shown to be of great importance for comparing OER catalyst feasibility.

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Language(s): eng - English
 Dates: 2017-11-09
 Publication Status: Published in print
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000414810200003
DOI: 10.1002/cssc.201701523
 Degree: -

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Title: ChemSusChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 10 (21) Sequence Number: - Start / End Page: 4140 - 4143 Identifier: ISSN: 1864-5631
CoNE: /journals/resource/1864-5631