Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 39, Pages 12840-12844Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201808818
Keywords
electrocatalysts; heterogeneous catalysis; oxygen evolution; water electrolysis; X-ray absorption spectroscopy
Categories
Funding
- National Science Foundation [CHE-1566348]
- Nancy and Stephen Grand Technion Energy Program (GTEP)
- Ministry of Science and Technology (MOST), Israel
- DOE Office of Science User Facility [DE-AC02-05CH11231]
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available