Rahman, Gul Joo, Oh-Shim 2024-01-20T12:03:51Z 2024-01-20T12:03:51Z 2021-09-05 2013-06-15 0254-0584 https://pubs.kist.re.kr/handle/201004/127964 Electrochemically deposited alpha-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 alpha-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 alpha-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 alpha-Fe2O3 thin films. The Pt doped films exhibited higher photoelectrochemical activity by a factor of 1.4 over un-doped alpha-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 alpha-Fe2O3 thin films. (C) 2013 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA IRON-OXIDE FILMS HYDROGEN-PRODUCTION HEMATITE OXIDATION TIO2 COMPOSITE OXYGEN XPS Electrodeposited nanostructured alpha-Fe2O3 thin films for solar water splitting: Influence of Pt doping on photoelectrochemical performance Article 10.1016/j.matchemphys.2013.03.042 1 MATERIALS CHEMISTRY AND PHYSICS, v.140, no.1, pp.316 - 322 MATERIALS CHEMISTRY AND PHYSICS 140 1 316 322 scie scopus 000319789500046 2-s2.0-84877578069 Materials Science, Multidisciplinary Materials Science Article IRON-OXIDE FILMS HYDROGEN-PRODUCTION HEMATITE OXIDATION TIO2 COMPOSITE OXYGEN XPS Semiconductors Electrochemical techniques Nanostructures Thin films Electrochemical properties