Activity and Durability of Iridium Nanoparticles in the Oxygen Evolution Reaction
Journal Article
·
· Journal of the Electrochemical Society
- National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemical and Materials Science Center
- Giner, Inc., Newton, MA (United States)
- Colorado School of Mines, Golden, CO (United States). Dept. of Chemistry
Unsupported iridium (Ir) nanoparticles, that serve as standard oxygen evolution reaction (OER) catalysts in acidic electrolyzers, were investigated for electrochemical performance and durability in rotating disk electrode (RDE) half-cells. Fixed potential holds and potential cycling were applied to probe the durability of Ir nanoparticles, and performance losses were found to be driven by particle growth (coarsening) at moderate potential (1.4 to 1.6 V) and Ir dissolution at higher potential (>/=1.8 V). Several different commercially available samples were evaluated and standardized conditions for performance comparison are reported. In conclusion, the electrocatalyst RDE results have also been compared to results obtained for performance and durability in electrolysis cells.
- Research Organization:
- NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC36-08GO28308; SC0007471
- OSTI ID:
- 1290782
- Report Number(s):
- NREL/JA--5900-66915
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 11 Vol. 163; ISSN 0013-4651
- Publisher:
- The Electrochemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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