Vectorial electron transfer on designed surfaces. Annual report, February 1986-January 1987
Bipolar CdSe/CoS semiconductor photoelectrode panels, capable of vectorial electron transfer, were used in series arrays to photodecompose water to yield hydrogen and oxygen in stoichiometric ratio with a maximum solar efficiency of about 1%. An analytical model was developed for these arrays which addresses the question of water splitting and electrical power-generation efficiencies as functions of the number of panels, the overpotentials of the gas-generating electrodes, incident light intensity, and the concentrations of the redox couples. Hydrogen production using a self-assembling zeolite system was discovered. Sensitized anatase TiO/sub 2/ electrodes were used in photoelectrochemical cells employing a variety of solution redox couples (iodide, ferrocyanide, hydroquinone derivatives). The photoassisted production of hydrogen from methanol-water solutions containing mixtures of small particles of CdS/SiO/sub 2/ and a wide bandgap semiconductor (TiO/sub 2/, ZnO, SnO/sub 2/ or WO/sub 3/), supported on silica and platinized was studied. The phenomenon of interparticle charge separation for CdS/SiO/sub 2/ was found to be operative for CdS/SiO/sub 2/ with WS/sub 2//SiO/sub 2/.
- Research Organization:
- Texas Univ., Austin (USA). Dept. of Chemistry
- OSTI ID:
- 6125434
- Report Number(s):
- PB-87-232229/XAB
- Resource Relation:
- Other Information: See also annual report for January 1983-January 1984, PB--84-198530
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
HYDROGEN PRODUCTION
PHOTOELECTROLYSIS
PHOTOELECTRIC CELLS
ELECTRON TRANSFER
WATER
CATALYSTS
DIPOLES
EFFICIENCY
ELECTRODES
GAS FUELS
METALS
OXYGEN
POLYMERS
SYNTHETIC FUELS
DIRECT ENERGY CONVERTERS
ELECTROLYSIS
ELEMENTS
FUELS
HYDROGEN COMPOUNDS
LYSIS
MULTIPOLES
NONMETALS
OXYGEN COMPOUNDS
080101* - Hydrogen- Production- Electrolysis
140505 - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)