Probing reaction mechanisms in mixed phase TiO2 by EPR

D. C. Hurum, A. G. Agrios, S. E. Crist, K. A. Gray*, T. Rajh, M. C. Thurnauer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

231 Scopus citations


Charge separation processes in mixed phase TiO2 photocatalysts are investigated by electron paramagnetic resonance (EPR) spectroscopy. The mechanisms of interfacial electron transfer, subsequent charge migration and recombination at surface sites, and other interfacial effects on chlorophenol/TiO2 chemistry have been probed. Distorted interfacial sites have been observed and are proposed as catalytically reactive hot spots. This detailed knowledge of charge transfer processes is critical to the nanoscale design of catalysts and subsequent improvement of catalytic efficiency.

Original languageEnglish (US)
Pages (from-to)155-163
Number of pages9
JournalJournal of Electron Spectroscopy and Related Phenomena
Issue number2-3
StatePublished - Feb 2006


  • Anatase
  • Electron paramagnetic resonance (EPR)
  • Interfacial charge transfer
  • Mixed phase TiO
  • Photocatalysis
  • Rutile

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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