We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Operando X‐Ray Absorption Spectroscopy Shows Iron Oxidation Is Concurrent with Oxygen Evolution in Cobalt–Iron (Oxy)hydroxide Electrocatalysts.
- Authors
Enman, Lisa J.; Stevens, Michaela Burke; Dahan, Meir Haim; Nellist, Michael R.; Toroker, Maytal Caspary; Boettcher, Shannon W.
- Abstract
Iron cations are essential for the high activity of nickel and cobalt‐based (oxy)hydroxides for the oxygen evolution reaction, but the role of iron in the catalytic mechanism remains under active investigation. Operando X‐ray absorption spectroscopy and density functional theory calculations are used to demonstrate partial Fe oxidation and a shortening of the Fe−O bond length during oxygen evolution on Co(Fe)OxHy. Cobalt oxidation during oxygen evolution is only observed in the absence of iron. These results demonstrate a different mechanism for water oxidation in the presence and absence of iron and support the hypothesis that oxidized iron species are involved in water‐oxidation catalysis on Co(Fe)OxHy.
- Subjects
X-ray absorption; IRON oxidation; IRON sulfates; OXYGEN evolution reactions; ELECTROCATALYSTS; OXIDATION
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 39, p13022
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201808818