Cobalt analogs of Ru-based water oxidation catalysts: Overcoming thermodynamic instability and kinetic lability to achieve electrocatalytic O 2 evolution

Matthew L. Rigsby, Sukanta Mandal, Wonwoo Nam, Lara C. Spencer, Antoni Llobet, Shannon S. Stahl

Research output: Contribution to journalArticlepeer-review

120 Scopus citations

Abstract

Several binuclear cobalt(iii) complexes that mimic Ru-based water oxidation catalysts have been prepared. The initial complexes exhibited thermodynamic instability and kinetic lability that complicated efforts to use these cobalt complexes as electrocatalysts for water oxidation. Binuclear cobalt(iii) complexes supported by a bridging bispyridylpyrazolate (bpp) ligand overcome these limitations. Two bpp-ligated dicobalt(iii)-peroxo complexes were prepared and structurally characterized, and electrochemical investigation of these complexes supports their ability to serve as molecular electrocatalysts for water oxidation under acidic conditions (pH 2.1).

Original languageEnglish
Pages (from-to)3058-3062
Number of pages5
JournalChemical Science
Volume3
Issue number10
DOIs
StatePublished - Oct 2012

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