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Geiger S, Kasian O, Mingers AM, et al. Catalyst Stability Benchmarking for the Oxygen Evolution Reaction: The Importance of Backing Electrode Material and Dissolution in Accelerated Aging Studies. ChemSusChem. 2017;10(21):4140-4143doi: 10.1002/cssc.201701523.
Geiger, S., Kasian, O., Mingers, A. M., Nicley, S. S., Haenen, K., Mayrhofer, K. J. J., & Cherevko, S. (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. https://doi.org/10.1002/cssc.201701523
Geiger, Simon, et al. "Catalyst Stability Benchmarking for the Oxygen Evolution Reaction: The Importance of Backing Electrode Material and Dissolution in Accelerated Aging Studies." ChemSusChem vol. 10,21 (2017): 4140-4143. doi: https://doi.org/10.1002/cssc.201701523
Geiger S, Kasian O, Mingers AM, Nicley SS, Haenen K, Mayrhofer KJJ, Cherevko S. Catalyst Stability Benchmarking for the Oxygen Evolution Reaction: The Importance of Backing Electrode Material and Dissolution in Accelerated Aging Studies. ChemSusChem. 2017 Nov 09;10(21):4140-4143. doi: 10.1002/cssc.201701523. Epub 2017 Oct 17. PMID: 28922570.
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ChemSusChem. 2017 Nov 09;10(21):4140-4143. doi: 10.1002/cssc.201701523. Epub 2017 Oct 17.

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

ChemSusChem

Simon Geiger, Olga Kasian, Andrea M Mingers, Shannon S Nicley, Ken Haenen, Karl J J Mayrhofer, Serhiy Cherevko

Affiliations

  1. Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, 40237, Düsseldorf, Germany.
  2. Institute for Materials Research (IMO), Hasselt University, &, IMOMEC, IMEC vzw, 3590, Diepenbeek, Belgium.
  3. Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, 91058, Erlangen, Germany.
  4. Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058, Erlangen, Germany.

PMID: 28922570 DOI: 10.1002/cssc.201701523

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.

© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: boron doped diamond; dissolution; glassy carbon; oxygen evolution reaction; stability protocols

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