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 |
|---|---|
| Pages (from-to) | 3617-3622 |
| Number of pages | 6 |
| Journal | Journal of the Chemical Society. Dalton Transactions |
| Volume | 42 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jan 4 2013 |
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ASJC Scopus subject areas
- Chemistry(all)
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Effects of aqueous buffers on electrocatalytic water oxidation with an iridium oxide material electrodeposited in thin layers from an organometallic precursor. / Kushner-Lenhoff, Maxwell N.; Blakemore, James D.; Schley, Nathan D.; Crabtree, Robert H.; Brudvig, Gary W.
In: Journal of the Chemical Society. Dalton Transactions, Vol. 42, No. 2, 04.01.2013, p. 3617-3622.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Effects of aqueous buffers on electrocatalytic water oxidation with an iridium oxide material electrodeposited in thin layers from an organometallic precursor
AU - Kushner-Lenhoff, Maxwell N.
AU - Blakemore, James D.
AU - Schley, Nathan D.
AU - Crabtree, Robert H.
AU - Brudvig, Gary W
PY - 2013/1/4
Y1 - 2013/1/4
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85033271200&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85033271200&partnerID=8YFLogxK
U2 - 10.1039/c2dt32326e
DO - 10.1039/c2dt32326e
M3 - Article
C2 - 23292194
AN - SCOPUS:84873642533
VL - 42
SP - 3617
EP - 3622
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1477-9226
IS - 2
ER -