Journal
DALTON TRANSACTIONS
Volume 42, Issue 10, Pages 3617-3622Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2dt32326e
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Funding
- Argonne-Northwestern Solar Energy Research (ANSER) Center
- Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001059]
- U.S. DOE [DE-FG02-84ER13297]
- U.S. Department of Energy (DOE) [DE-FG02-84ER13297] Funding Source: U.S. Department of Energy (DOE)
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A thin layer of an amorphous, mixed-valence iridium oxide (electrodeposited from an organometallic precursor, [Cp*Ir(H2O)(3)](2+)) is a heterogeneous catalyst among the most active and stable currently available for electrochemical water oxidation. We show that buffers can improve the oxygen-evolution activity of such thin-layer catalysts near neutral pH, but that buffer identity and concentration, as well as the solution pH, remain key determinants of long-term electrocatalyst activity and stability; for example, phosphate buffer can reduce the overpotential by up to 173 mV.
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