Generation of H/sub 2/O/sub 2/ during water photoelectrolysis at n-TiO/sub 2/

Journal Article · Thu Dec 06 00:00:00 EST 1984 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150669a013· OSTI ID:5963574

Salvador, P; Decker, F

The rotating ring-disk electrode (RRDE) technique has been used to investigate the photoproduction of H/sub 2/O during water photoelectrolysis on n-TiO/sub 2/. In spite of the fact that hydrogen peroxide is a real intermediate product of water photoelectrolysis, it cannot be detected at the ring electrode under different working conditions of illumination intensity and disk potential. Part of the photogenerated H/sub 2/O/sub 2/ is believed to be photooxidized before diffusing away from the electrode. Probably a very small amount of H/sub 2/O/sub 2/, which is under the detection limit of the RRDE technique, is able to dissolve into the electrolyte. Mechanisms describing O/sub 2/ evolution via the photogeneration of H/sub 2/O/sub 2/, which are consistent with the observed RRDE results, are postulated.

• Research Organization: Instituto de Catalisis y Petroleoquimica, Madrid, Spain
• OSTI ID: 5963574
• Journal Information: J. Phys. Chem.; (United States), Vol. 88:25
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROGEN PRODUCTION
PHOTOLYSIS
WATER
ELECTROLYSIS
ELECTRODES
EXPERIMENTAL DATA
TITANIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
HYDROGEN COMPOUNDS
INFORMATION
LYSIS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
080106* - Hydrogen- Production- Biosynthesis & Photochemical Processes
400500 - Photochemistry