Heterogenized Iridium Water-Oxidation Catalyst from a Silatrane Precursor

Kelly L. Materna, Benjamin Rudshteyn, Bradley J. Brennan, Morgan H. Kane, Aaron J. Bloomfield, Daria L. Huang, Dimitar Y. Shopov, Victor S. Batista, Robert H. Crabtree, Gary W. Brudvig

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

A pentamethylcyclopentadienyl (Cp∗) iridium water-oxidation precatalyst was modified to include a silatrane functional group for covalent attachment to metal oxide semiconductor surfaces. The heterogenized catalyst was found to perform electrochemically driven water oxidation at an overpotential of 462 mV with a turnover number of 304 and turnover frequency of 0.035 s-1 in a 0.1 M KNO3 electrolyte at pH 5.8. Computational modeling of the experimental IR spectra suggests that the catalyst retains its Cp∗ group during the first hour of catalysis and likely remains monomeric.

Original languageEnglish
Pages (from-to)5371-5377
Number of pages7
JournalACS Catalysis
Volume6
Issue number8
DOIs
Publication statusPublished - Aug 5 2016

Keywords

  • alternative energy
  • electrocatalysis
  • iridium
  • metal oxide
  • silatrane
  • surface binding
  • water oxidation

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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