Operando Characterization of Fe in Doped Ni x (Fe 1– x )O y H z Catalysts for Electrochemical Oxygen Evolution
Stockholm University · SLAC National Accelerator Laboratory · +12 more institutions
Abstract
Iron-doped nickel oxyhydroxides, Nix(Fe1–x)OyHz, are among the most promising oxygen evolution reaction (OER) electrocatalysts in alkaline environments. Although iron (Fe) significantly enhances the catalytic activity, there is still no clear consensus on whether Fe directly participates in the reaction or merely acts as a promoter. To elucidate the Fe’s role, we performed operando X-ray spectroscopy studies supported by DFT on Nix(Fe1–x)OyHz electrocatalysts. We probed the reversible changes in the structure and electronic character of Nix(Fe1–x)OyHz as the electrode potential is cycled between the resting (here at 1.10 VRHE) and operational states (1.66 VRHE). DFT calculations and XAS simulations on a…
Citation impact
- FWCI
- 13.14
- Percentile
- 100%
- References
- 100
Authors
15- JHJoakim Halldin Stenlid
Stockholm University, SLAC National Accelerator Laboratory, Interface (United States), Nova Management (United States), AlbaNova, Stanford University
- MGMikaela Görlin
Uppsala University, Stockholm University, Nova Management (United States), AlbaNova
- ODOscar Díaz‐Morales
Netherlands Organisation for Applied Scientific Research, Stockholm University, Nova Management (United States), AlbaNova, Holst Centre (Netherlands)
- BDBernadette Davies
Stockholm University, Nova Management (United States), AlbaNova
- ВВВ. В. Григорьев
Stockholm University, Nova Management (United States), Wallenberg Wood Science Center, AlbaNova, Institute for Sustainability
Topics & keywords
- Chemistry
- Catalysis
- Doping
- Characterization (materials science)
- Physical chemistry
- Analytical Chemistry (journal)
- Crystallography
- Inorganic chemistry