A novel photoelectrochemical cell with self-organized TiO2 nanotubes as photoanodes for hydrogen generation |
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Authors: | Yongkun Li Hongmei Yu Wei SongGuangfu Li Baolian YiZhigang Shao |
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Affiliation: | a Laboratory of Fuel Cells, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China b Graduate University of Chinese Academy of Sciences, Beijing 100039, PR China |
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Abstract: | A photoelectrochemical (PEC) cell with an innovative design for hydrogen generation via photoelectrocatalytic water splitting is proposed and investigated. It consisted of a TiO2 nanotube photoanode, a Pt/C cathode and a commercial asbestos diaphragm. The PEC could generate hydrogen under ultraviolet (UV) light-excitation with applied bias in KOH solution. The Ti mesh was used as the substrate to synthesize the self-organized TiO2 nanotubular array layers. The effect of the morphology of the nanotubular array layers on the photovoltaic performances was investigated. When TiO2 photocatalyst was irradiated with UV-excitation, it prompted the water splitting under applied bias (0.6 V vs. Normal Hydrogen Electrode, NHE.). Photocurrent generation of 0.58 mA/cm2 under UV-light irradiation showed good performance on hydrogen production. |
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Keywords: | Photoelectrochemical cell Electrochemical anodization TiO2 nanotubes Water splitting Hydrogen production |
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