Electrodeposited nanostructured α-Fe2O3 thin films for solar water splitting: Influence of Pt doping on photoelectrochemical performance
- Electrodeposited nanostructured α-Fe2O3 thin films for solar water splitting: Influence of Pt doping on photoelectrochemical performance
- 걸라흐만; 주오심
- Semiconductors; Electrochemical techniques; Nanostructures; Thin films; Electrochemical properties
- Issue Date
- Materials chemistry and physics
- VOL 140, NO 1, 316-322
- Electrochemically deposited a-Fe2O3 thin films, whose composition was tuned by Pt doping, were
investigated as photoanode for photoelectrochemical water splitting. Morphological and structural
characteristics of the nanostructured a-Fe2O3 thin films were studied by scanning electron microscopy
and X-ray diffraction techniques. The films were characterized by Raman spectroscopy and X-ray
photoelectron spectroscopy to determine the effect of Pt doping on the a-Fe2O3 structure. The photoelectrochemical
performance of the films was examined by linear sweep voltammetry and electrochemical
impedance spectroscopy. Results of these studies showed that Pt doping increased the density
of small-sized nanoparticles in a-Fe2O3 thin films. The Pt doped films exhibited higher photoelectrochemical
activity by a factor of 1.4 over un-doped a-Fe2O3 films. The highest photocurrent density
of 0.56 mA cm 2 was registered for 3% pt doped film at 0.4 V versus Ag/AgCl in 1 M NaOH electrolyte and
under standard illumination conditions (AM 1.5 G, 100 mW cm-2). This high photoactivity can be
attributed to the high active surface area and increased donor density caused by Pt doping in the film.
Electrochemical impedance analysis also revealed significantly low charge transfer resistance of Pt doped
films, indicating its superior electrocatalytic activity for water splitting reaction compared to un-doped
a-Fe2O3 thin films.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.