The Effect of Iron Impurities on Transition Metal Catalysts for the Oxygen 
Evolution Reaction in Alkaline Environment: Activity Mediators or Active Sites?

Spanos, I.; Masa, J.; Zeradjanin, A.; Schlögl, Robert

doi:10.1007/s10562-020-03478-4

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The Effect of Iron Impurities on Transition Metal Catalysts for the Oxygen Evolution Reaction in Alkaline Environment: Activity Mediators or Active Sites?

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Schlögl, Robert
Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion;
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Spanos, I., Masa, J., Zeradjanin, A., & Schlögl, R. (2021). The Effect of Iron Impurities on Transition Metal Catalysts for the Oxygen Evolution Reaction in Alkaline Environment: Activity Mediators or Active Sites? Catalysis Letters, 151(7), 1843-1856. doi:10.1007/s10562-020-03478-4.

Cite as: https://hdl.handle.net/21.11116/0000-0007-A32D-F

Abstract

There is an ongoing debate on elucidating the actual role of Fe impurities in alkaline water electrolysis, acting either as reactivity mediators or as co-catalysts through synergistic interaction with the main catalyst material. This perspective summarizes the most prominent oxygen evolution reaction (OER) mechanisms mostly for Ni-based oxides as model transition metal catalysts and highlights the effect of Fe incorporation on the catalyst surface in the form of impurities originating from the electrolyte or co-precipitated in the catalyst lattice, in modulating the OER reaction kinetics, mechanism and stability