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


Reference:

Peter, L. M. and Ushiroda, S., 2004. Microwave reflectance studies of photoelectrochemical kinetics at semiconductor electrodes. 3. Photolectrochemical reduction of Ru(NH3)(6)(3+) at p-Si. Journal of Physical Chemistry B, 108 (8), pp. 2660-2665.

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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.

Details

Item Type Articles
CreatorsPeter, L. M.and Ushiroda, S.
DOI10.1021/jp0311963
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code4881
Additional InformationID number: ISI:000189152000026

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