Microwave reflectance studies of photoelectrochemical kinetics at semiconductor electrodes. 3. Photolectrochemical reduction of Ru(NH3)(6)(3+) at p-Si

L M Peter, S Ushiroda

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The reduction of Ru(NH3)(6)(3+) at illuminated p-Si in ammonium fluoride solutions was studied by a light modulated microwave reflectivity method. Ru(NH3)(6)(3+) was chosen as an example of a one electron outer sphere redox system that is expected to exhibit facile electron transfer kinetics. The results of the microwave measurements show that the transfer of photogenerated electrons to Ru(NH3)(6)(3+) at an illuminated p-Si electrode is very slow compared to an order of magnitude estimate for outer sphere electron transfer. It is concluded that the reduction of Ru(NH3)(6)(3+) does not involve direct electron transfer from the conduction band but is instead mediated by photogenerated hydrogen states.
Original languageEnglish
Pages (from-to)2660-2665
Number of pages6
JournalJournal of Physical Chemistry B
Volume108
Issue number8
DOIs
Publication statusPublished - 2004

Fingerprint Dive into the research topics of 'Microwave reflectance studies of photoelectrochemical kinetics at semiconductor electrodes. 3. Photolectrochemical reduction of Ru(NH3)(6)(3+) at p-Si'. Together they form a unique fingerprint.

  • Cite this