Direct oxygen isotope effect identifies the rate-determining step of electrocatalytic OER at an oxidic surface

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Haschke S, Mader M, Schlicht S, Roberts AM, Angeles-Boza A, Barth J, Bachmann J
Zeitschrift: Nature Communications
Verlag: NATURE PUBLISHING GROUP
Jahr der Veröffentlichung: 2018
Band: 9
ISSN: 2041-1723


Abstract

Understanding the mechanism of water oxidation to dioxygen represents the bottleneck towards the design of efficient energy storage schemes based on water splitting. The investigation of kinetic isotope effects has long been established for mechanistic studies of various such reactions. However, so far natural isotope abundance determination of O-2 produced at solid electrode surfaces has not been applied. Here, we demonstrate that such measurements are possible. Moreover, they are experimentally simple and sufficiently accurate to observe significant effects. Our measured kinetic isotope effects depend strongly on the electrode material and on the applied electrode potential. They suggest that in the case of iron oxide as the electrode material, the oxygen evolution reaction occurs via a rate-determining O-O bond formation via nucleophilic water attack on a ferryl unit.


FAU-Autoren / FAU-Herausgeber

Bachmann, Julien Prof.
Lehrstuhl für Chemistry of thin film materials
Barth, Johannes Prof.
Lehrstuhl für Angewandte Geologie
Haschke, Sandra
Professur für Anorganische Chemie
Mader, Michael
Lehrstuhl für Angewandte Geologie
Roberts, André Michael
Lehrstuhl für Angewandte Geologie
Schlicht, Stefanie
Lehrstuhl für Chemistry of thin film materials


Zitierweisen

APA:
Haschke, S., Mader, M., Schlicht, S., Roberts, A.M., Angeles-Boza, A., Barth, J., & Bachmann, J. (2018). Direct oxygen isotope effect identifies the rate-determining step of electrocatalytic OER at an oxidic surface. Nature Communications, 9. https://dx.doi.org/10.1038/s41467-018-07031-1

MLA:
Haschke, Sandra, et al. "Direct oxygen isotope effect identifies the rate-determining step of electrocatalytic OER at an oxidic surface." Nature Communications 9 (2018).

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Zuletzt aktualisiert 2019-07-01 um 04:10