A porphyrin-stabilized iridium oxide water oxidation catalyst

Benjamin D. Sherman, Smitha Pillai, Gerdenis Kodis, Jesse Bergkamp, Thomas E. Mallouk, Devens Gust, Thomas Moore, Ana Moore

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Colloidal solutions of iridium oxide hydrate (IrO2· nH2O) were formed using porphyrin stabilizers bearing malonate-like functional groups at each of the four meso positions of the porphyrin ring. Cyclic voltammetry and monitoring of solution oxygen concentrations under constant applied potential demonstrated the electrochemical catalytic activity of the porphyrin-IrO2·nH2O complexes for the oxidation of water to oxygen. Quenching of the porphyrin fluorescence in the complex implies strong interaction between the porphyrin and the IrO 2·nH2O. These results mark a step toward developing a porphyrin-based photoanode for use in a photoelectrochemical water-splitting cell.

Original languageEnglish (US)
Pages (from-to)152-157
Number of pages6
JournalCanadian Journal of Chemistry
Volume89
Issue number2
DOIs
StatePublished - 2011

Keywords

  • Electrochemical catalysis
  • Iridium oxide
  • Porphyrin
  • Water oxidation

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Organic Chemistry

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