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

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 reactio...

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Veröffentlicht in:Catalysis letters Jg. 151; H. 7; S. 1843 - 1856
Hauptverfasser: Spanos, Ioannis, Masa, Justus, Zeradjanin, Aleksandar, Schlögl, Robert
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York Springer US 01.07.2021
Springer
Springer Nature B.V
Schlagworte:
Catalysis
Catalysts
Chemical properties
Chemical reaction, Rate of
Chemistry
Chemistry and Materials Science
Electrolysis
Electrolytes
Energy minerals
Force and energy
Fossil fuels
Hydrogen as fuel
Impurities
Industrial Chemistry/Chemical Engineering
Iron
Metal catalysts
Nickel
Organometallic Chemistry
Oxides
Oxygen evolution reactions
Perspective
Physical Chemistry
Reaction kinetics
Transition metal compounds
Transition metals
Reaction mechanism
Electrocatalysis
Alkaline water electrolysis
Fe impurities
ISSN:1011-372X, 1572-879X
Online-Zugang:Volltext
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Zusammenfassung: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. Graphic Abstract
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-020-03478-4