ATR-SEIRAS Investigation of the Fermi Level of Pt Cocatalyst on a GaN Photocatalyst for Hydrogen Evolution under Irradiation
- 28 August 2009
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 131 (37), 13218-13219
- https://doi.org/10.1021/ja904991p
Abstract
The interaction of photogenerated carries in GaN photocatalyst with Pt cocatalyst for hydrogen evolution under irradiation was investigated from in situ ATR-SEIRAS measurement by following the CO vibrational frequency. After irradiation, the CO frequency shifted higher, indicating that the Fermi level of Pt particles was positively shifted by the photogenerated holes. Thereafter, a lower frequency peak appeared, indicating that the Fermi level of some Pt particles was negatively shifted to the hydrogen evolution potential by photogenerated electrons, which is the essential function of cocatalysis for hydrogen evolution.Keywords
This publication has 28 references indexed in Scilit:
- Photocatalytic water splitting by RuO2-loaded metal oxides and nitrides with d0- and d10 -related electronic configurationsEnergy & Environmental Science, 2009
- Heterogeneous photocatalyst materials for water splittingChemical Society Reviews, 2008
- A metal-free polymeric photocatalyst for hydrogen production from water under visible lightNature Materials, 2008
- Inorganic Materials as Catalysts for Photochemical Splitting of WaterChemistry of Materials, 2007
- New Non-Oxide Photocatalysts Designed for Overall Water Splitting under Visible LightThe Journal of Physical Chemistry C, 2007
- Noble‐Metal/Cr2O3 Core/Shell Nanoparticles as a Cocatalyst for Photocatalytic Overall Water SplittingAngewandte Chemie-International Edition, 2006
- Photocatalyst releasing hydrogen from waterNature, 2006
- Photocatalytic Water Splitting Under Visible Light with Particulate Semiconductor CatalystsCatalysis Surveys from Asia, 2005
- Light-to-Chemical Energy Conversion in Lamellar Solids and Thin FilmsInorganic Chemistry, 2005
- GaN:ZnO Solid Solution as a Photocatalyst for Visible-Light-Driven Overall Water SplittingJournal of the American Chemical Society, 2005