Effects of aqueous buffers on electrocatalytic water oxidation with an iridium oxide material electrodeposited in thin layers from an organometallic precursor

Maxwell N. Kushner-Lenhoff, James D. Blakemore, Nathan D. Schley, Robert H. Crabtree, Gary W Brudvig

Research output: Contribution to journalArticle

21 Citations (Scopus)

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 languageEnglish
Pages (from-to)3617-3622
Number of pages6
JournalJournal of the Chemical Society. Dalton Transactions
Volume42
Issue number2
DOIs
Publication statusPublished - Jan 4 2013

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Organometallics
Buffers
Oxidation
Water
Catalysts
Electrocatalysts
Phosphates
Oxygen
iridium oxide

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 journalArticle

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