Effects of Fe Electrolyte Impurities on Ni(OH) 2 /NiOOH Structure and Oxygen Evolution Activity
Lawrence Berkeley National Laboratory · University of California, Berkeley · +1 more institution
Abstract
Ni-(oxy)hydroxide-based materials are promising earth-abundant catalysts for electrochemical water oxidation in basic media. Recent findings demonstrate that incorporation of trace Fe impurities from commonly used KOH electrolytes significantly improves oxygen evolution reaction (OER) activity over NiOOH electrocatalysts. Because nearly all previous studies detailing structural differences between α-Ni(OH)2/γ-NiOOH and β-Ni(OH)2/β-NiOOH were completed in unpurified electrolytes, it is unclear whether these structural changes are unique to the aging phase transition in the Ni-(oxy)hydroxide matrix or if they arise fully or in part from inadvertent Fe incorporation. Here, we report an investigation of the…
Citation impact
- FWCI
- 22.03
- Percentile
- 100%
- References
- 53
Authors
5- SKShannon KlausCorresponding
Lawrence Berkeley National Laboratory, University of California, Berkeley, Joint Center for Artificial Photosynthesis
- YCYun Cai
Joint Center for Artificial Photosynthesis, University of California, Berkeley, Lawrence Berkeley National Laboratory
- MWMary W. Louie
University of California, Berkeley, Lawrence Berkeley National Laboratory, Joint Center for Artificial Photosynthesis
- LTLena Trotochaud
Lawrence Berkeley National Laboratory, University of California, Berkeley, Joint Center for Artificial Photosynthesis
- ATAlexis T. Bell
Lawrence Berkeley National Laboratory, Joint Center for Artificial Photosynthesis, University of California, Berkeley
Topics & keywords
- Electrolyte
- Hydroxide
- Tafel equation
- Oxygen evolution
- Electrochemistry
- Catalysis
- Inorganic chemistry
- Raman spectroscopy