Interfacial charge transfer in Pt-loaded TiO^sub 2^ P25 photocatalysts studied by in-situ diffuse reflectance FTIR spectroscopy of adsorbed CO

Interfacial charge transfer in Pt-loaded TiO^sub 2^ P25 photocatalysts studied by in-situ diffuse reflectance FTIR spectroscopy of adsorbed CO

The efficiency of photocatalytic systems is strongly depending on the charge carrier transfer from the excited semiconductor to co-catalyst particles attached on its surface. In this study, we investigated the influence of photo-induced charge transfer in photoplatinized TiO2 P25 photocatalysts by d...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2019-02, Vol.370, p.84
Hauptverfasser: Litke, Anton, Frei, Heinz, Hensen, Emiel JM, Hofmann, Jan P
Format: Artikel
Sprache:eng
Schlagworte:
Aqueous electrolytes
Catalysis
Catalysts
Charge transfer
Cobalt
Current carriers
Dielectric properties
Electrical properties
Fourier transforms
Infrared spectroscopy
Photocatalysis
Photocatalysts
Platinum
Reflectance
Spectroscopy
Spectrum analysis
Stark effect
Surface reactions
Titanium dioxide
Vacuum
Vapor phases
Vibration
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The efficiency of photocatalytic systems is strongly depending on the charge carrier transfer from the excited semiconductor to co-catalyst particles attached on its surface. In this study, we investigated the influence of photo-induced charge transfer in photoplatinized TiO2 P25 photocatalysts by diffuse reflectance FTIR spectroscopy of CO molecules adsorbed on the Pt co-catalyst under well-defined gas phase conditions. In contrast to aqueous conditions, where shifts of the CO stretching vibration of up to 50 cm−1 have been reported, the observed shifts under gas phase conditions are very small (
ISSN:1010-6030
1873-2666
DOI:10.1016/j.jphotochem.2018.10.023