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Effects of Applied Voltages on the Electronic Properties of TiO2 Electrodes and the Photocatalytic Water Splitting

Shin-Tae Bae 1Jin Young Kim 1Sangwook Lee 1Dong Wook Kim 1Hyunho Shin 2Kug Sun Hong 1

1. Seoul National University, Department of Materials Science and Engineering (MSE, SNU), San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-744, Korea, South
2. Kangnung National University, Kangnung 210-710, Korea, South


Applied voltage between anode (TiO2) nanoparticles and cathode (Pt) in a water photolysis reactor drastically increased water photolysis-induced photocurrent and hydrogen production. The amounts of hydrogen production increased by 30 times with a small applied voltage of 1.5 V. The notable increase of hydrogen production was explained in terms of the decreased Schottky contact potential barrier at indium tin oxide (ITO)/TiO2 by the applied voltage, while at high voltage regime, the alteration of the Helmholtz layer by the applied voltage further modifies the voltage-assisted increase of the photocurrent.


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Presentation: Poster at E-MRS Fall Meeting 2007, Symposium A, by Shin-Tae Bae
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-14 10:00
Revised:   2009-06-07 00:44