Abstract
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.
Original language | English |
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Pages (from-to) | 3617-3622 |
Number of pages | 6 |
Journal | Dalton Transactions |
Volume | 42 |
Issue number | 10 |
DOIs | |
Publication status | Published - Mar 14 2013 |
ASJC Scopus subject areas
- Inorganic Chemistry