Competition reactions at. cap alpha. -Fe/sub 2/O/sub 3/ photoanodes

Journal Article · Fri Apr 01 04:00:00 EST 1983 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2119835· OSTI ID:5102903

Shinar, R; Kennedy, J H

Photoanodic oxidation of iodide and bromide ions at polycrystalline doped ..cap alpha..-Fe/sub 2/O/sub 3/ electrodes in competition with oxygen production was investigated in the pH range 0-13 in aqueous media. It appears that at high pH values only iodide oxidation could compete effectively with water oxidation. However, in addition to the photoelectrochemical oxidation of iodide, evidence for secondary reactions involving electrogenerated species was observed mainly in highly basic solutions. Adsorption of I/sup -/ plays a significant role in the reaction as well as in the photoelectrochemical properties of ..cap alpha..-Fe/sub 2/O/sub 3/. ..cap alpha..-Fe/sub 2/O/sub 3/ photoanodes were found to be stable under illumination in solution at pH 0 with or without the presence of bromide ions. 13 references, 5 figures, 1 table.

• Research Organization: Univ. of California, Santa Barbara
• OSTI ID: 5102903
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 130:4; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALKALI METAL COMPOUNDS
ANODES
BROMINE
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
HALOGENS
HYDROGEN COMPOUNDS
HYDROXIDES
ILLUMINANCE
INFORMATION
INORGANIC ACIDS
IODINE
IONS
IRON COMPOUNDS
IRON OXIDES
KINETICS
NONMETALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOTOANODES
PHOTOCURRENTS
PHOTOELECTROCHEMICAL CELLS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
RADIATIONS
REACTION KINETICS
SILICON COMPOUNDS
SILICON OXIDES
SOLAR EQUIPMENT
SULFURIC ACID
TIME DEPENDENCE
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET RADIATION
YIELDS