Interaction of thiols with n-type cadmium sulfide and n-type cadmium selenide in aqueous solutions: adsorption of thiolate anion and efficient photoelectrochemical oxidation to disulfides
Organic thiols, RSH = cysteamine, 2-mercaptoethanol, penicillamine, or cysteine, effectively suppress photoanodic decomposition of n-CdS and n-CdSe in aqueous solution and undergo efficient controlled potential photoelectrochemical oxidation to the corresponding disulfides, RSSR. Photovoltage greater than 700 mV is observed for certain thiols upon excitation of the semiconductor anode with light of energy greater than the band gap. As electrodes for preparative electrosynthesis, both illuminated n-CdS and n-CdSe offer significant electrical energy savings compared to conventional electrochemical oxidation in the dark at a Pt electrode. The oxidation of RSH to RSSR at n-CdS and n-CdSe has been studied under various conditions.
- Research Organization:
- Massachusetts Institute of Technology, Cambridge
- OSTI ID:
- 5457412
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:17; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400500* -- Photochemistry
AQUEOUS SOLUTIONS
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CADMIUM SULFIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DISPERSIONS
ELECTROCHEMICAL CELLS
ELECTRODES
EQUIPMENT
EXPERIMENTAL DATA
INFORMATION
INORGANIC PHOSPHORS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOSPHORS
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
SELENIDES
SELENIUM COMPOUNDS
SOLAR EQUIPMENT
SOLUTIONS
SORPTIVE PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
VOLTAMETRY