Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1279266 | International Journal of Hydrogen Energy | 2011 | 5 Pages |
A novel dual-bed system was designed to produce hydrogen through photocatalytic water splitting. The system was comprised of a photocatalytic reaction bed and a regeneration bed. Aqueous KI solution and Pt-loaded TiO2 constituted the photocatalytic reaction bed where hydrogen was produced; meanwhile the hole scavenger iodide ion was oxidized into I2. The effluent containing I2 from the photocatalytic bed entered the regeneration bed and passed through a Cu2O layer where I2 was reduced to Iā. The regeneration bed effluent was then recycled to the photocatalytic reaction bed. Since the hole scavenger KI in the photocatalytic bed was constantly kept at a high level through the continuous reduction of I2 in the regeneration bed, steady production of hydrogen was achieved in the dual-bed system for a much longer period as compared to a single-bed system without regeneration.