Spontaneous photoelectrolysis of HBr and HI
Spontaneous and efficient photoelectrolysis of HBr into hydrogen and bromine is reported for light of wavelengths to 950 nm in a p-n photoelectrolysis cell composed of a p-InP photocathode with noble metal catalyst islands on the surface and an n-MoSe/sub 2/ or an n-WSe/sub 2/ photoanode. Photoelectrolysis of HI with the same photoelectrodes yields hydrogen and iodine and simultaneously produces electrical power. The efficiency of the photoelectrolysis is calculated by two methods, one based on the stored free energy and the other based on electrical power saved. The efficiencies for HBr photoelectrolysis by 632.8 nm light are 7.8%, if calculated by the first method, and 11.2%, if calculated by the second. 34 refs.
- Research Organization:
- CNRS, Meudon, Fr
- OSTI ID:
- 6492350
- Journal Information:
- J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 129:8; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Energetics of p/n photoelectrolysis cells
Photochemical energy storage: studies of inorganic photoassistance agents. Progress report, April 1, 1982-September 30, 1984
Related Subjects
080101 -- Hydrogen-- Production-- Electrolysis
14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
ANODES
CATALYSTS
CATHODES
CHALCOGENIDES
EFFICIENCY
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYSIS
ELECTROLYTIC CELLS
EQUIPMENT
HALOGEN COMPOUNDS
HYDRIODIC ACID
HYDROBROMIC ACID
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
INORGANIC ACIDS
IODINE COMPOUNDS
LYSIS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SELENIDES
PHOTOANODES
PHOTOCATHODES
PHOTOELECTROCHEMICAL CELLS
PHOTOELECTROLYSIS
PHOTOELECTROLYTIC CELLS
SELENIDES
SELENIUM COMPOUNDS
SOLAR EQUIPMENT
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN SELENIDES