Thin film photoelectrochemistry: Iron oxide

Journal Article · Fri Jun 01 04:00:00 EDT 1984 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2115798· OSTI ID:6138690

Itoh, K; O'M Bockris, J

Fe/sub 2/O/sub 3/ photoelectrodes offer advantages in respect to simplicity. However, at normal thickness, the efficiency is low. In this paper, the consequences of reducing the thickness of the oxide below that of the space-charge region is investigated. Allowing the light transmitted through the first electrode to be incident on further semitransparent electrodes should give a gain over a normal (ca. 1 ..mu..m thick) electrode of ca. three times for ten successive electrodes. The theory is experimentally tested. It is quantitatively in agreement with experiment for values of the hole-solution transferrate constant (for water oxidation) of 6 x 10/sup -2/ cm s/sup -1/ M/sup -1/ and a model in which 1/4 of any change in applied p.d. occurs across the Helmholtz layer.

• Research Organization: Department of Chemistry, Texas A and M University, College Station, Texas
• OSTI ID: 6138690
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 131:6; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
CHALCOGENIDES
CHEMISTRY
ELECTROCHEMISTRY
ELECTRODES
FILMS
IRON COMPOUNDS
IRON OXIDES
MASS TRANSFER
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PHOTOCHEMISTRY
TESTING
THIN FILMS
TRANSITION ELEMENT COMPOUNDS