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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Location and State of Pt in Platinized CdS/TiO2 Photocatalysts for Hydrogen Production from Water under Visible Light

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Title
Location and State of Pt in Platinized CdS/TiO2 Photocatalysts for Hydrogen Production from Water under Visible Light
Other Titles
Location and State of Pt in Platinized CdS/TiO2 Photocatalysts for Hydrogen Production from Water under Visible Light
Author
Jang, Jum SukChoi, Sun HeeKim, Hyun GyuLee, Jae Sung
Keywords
BULK COMPOSITE PHOTOCATALYSTS; SOLAR-ENERGY CONVERSION; CADMIUM-SULFIDE POWDER; X-RAY-ABSORPTION; H-2 EVOLUTION; CDS; SEMICONDUCTOR; SUSPENSIONS; PHOTOCHEMISTRY; NANOPARTICLES
Issue Date
2008-11
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.112, no.44, pp.17200 - 17205
Abstract
CdS/TiO2 composite photocatalysts were platinized by different methods such as photodeposition (PD), wet impregnation (WI), and chemical reduction (CR), and studied for hydrogen production from water under visible light. All Pt species were in the metallic state, yet PD and WI photocatalysts contained electron-deficient Pt. In particular, Pt-Ti formation was identified in the WI catalyst, which contributed to electron deficiency of Pt. These two photocatalysts of electron-deficient Pt exhibited higher rates of hydrogen evolution due to favorable diffusion of photoelectrons from excited CdS toward the Pt. Between PD and WI photocatalysts, the PD catalyst showed a lower rate because part of the Pt in the catalyst resided on US, whereas all Pt species were located on TiO2 nanoparticles for WI and CR catalysts. The results indicate that the location as well as the electronic state of Pt is important for the high performance of platinized CdS/TiO2 photocatalysts in hydrogen production from water
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DOI
10.1021/jp804699c
ISSN
1932-7447
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ECHE_Journal Papers
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