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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/25704

Title: Catalyst Stability Benchmarking for the Oxygen Evolution Reaction: The Importance of Backing Electrode Material and Dissolution in Accelerated Aging Studies
Authors: Geiger, Simon
Kasian, Olga
Mingers, Andrea M.
Nicley, Shannon S.
Haenen, Ken
Mayrhofer, Karl J. J.
Cherevko, Serhiy
Issue Date: 2017
Citation: CHEMSUSCHEM, 10(21), p. 4140-4143
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.
Notes: [Geiger, Simon; Kasian, Olga; Mingers, Andrea M.; Mayrhofer, Karl J. J.; Cherevko, Serhiy] Max Planck Inst Eisenforsch GmbH, Dept Interface Chem & Surface Engn, D-40237 Dusseldorf, Germany. [Nicley, Shannon S.; Haenen, Ken] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Nicley, Shannon S.; Haenen, Ken] IMEC Vzw, IMOMEC, B-3590 Diepenbeek, Belgium. [Mayrhofer, Karl J. J.; Cherevko, Serhiy] Forschungszentrum Julich, Helmholtz Inst Erlangen Nurnberg Renewable Energy, D-91058 Erlangen, Germany. [Mayrhofer, Karl J. J.] Friedrich Alexander Univ Erlangen Nurnberg, Dept Chem & Biol Engn, D-91058 Erlangen, Germany.
URI: http://hdl.handle.net/1942/25704
DOI: 10.1002/cssc.201701523
ISI #: 000414810200003
ISSN: 1864-5631
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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