Electrode reactions of methanol and ethanol radicals at mercury

Journal Article · Sat Nov 01 04:00:00 EST 1986 · Sov. Electrochem. (Engl. Transl.); (United States)

OSTI ID:5387227

Benderskii, V A; Krivenko, A G; Kurmaz, V A

By laser-pulse photoelectron emission measurements in aqueous methanol and ethanol solutions (which contained N/sub 2/O in order to produce OH radicals for alcohol oxidation), the rate constants of oxidation and reduction (W/sub 2/ and W/sub 3/, respectively) of the alcohol radicals (adsorbed on the mercury electrode) were determined. The rates of reduction of CH/sub 2/OH and CH/sub 3/CHOH are pH-independent, while their potential dependence is well described by the slow-discharge relation. In alkaline solutions, the W/sub 2/ of these radicals decrease with decreasing pH and with potential when this is made more cathodic. It is concluded that the reduction of the alcohol radicals involves the formation of ions CH/sub 2/OH/sup -/ and CH/sub 3/CHOH/sup -/, while oxidation is an electron-proton transfer reaction which at pH between 8 and 12 involves hydroxyl ions. The values found for the rate constants are used to describe the electrochemical one-electron reduction reactions of formaldehyde.

• Research Organization: Institute of Chemical Physics, Moscow (USSR)
• OSTI ID: 5387227
• Journal Information: Sov. Electrochem. (Engl. Transl.); (United States), Journal Name: Sov. Electrochem. (Engl. Transl.); (United States) Vol. 22:5; ISSN SOECA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
400500 -- Photochemistry
ALCOHOLS
ALDEHYDES
ALKOXY RADICALS
ANODES
CATHODES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CURRENTS
ELECTRIC CURRENTS
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYSIS
ELECTROMAGNETIC RADIATION
ELECTRON TRANSFER
EMISSION
EQUATIONS
ETHANOL
ETHOXY RADICALS
FORMALDEHYDE
HYDROGEN TRANSFER
HYDROXY COMPOUNDS
KINETIC EQUATIONS
KINETICS
LASER RADIATION
LASER SPECTROSCOPY
LYSIS
METHANOL
METHOXY RADICALS
ORGANIC COMPOUNDS
OXIDATION
PH VALUE
PHOTOCURRENTS
PHOTOEMISSION
PRODUCTION
RADIATIONS
RADICALS
REACTION INTERMEDIATES
REACTION KINETICS
REDUCTION
SECONDARY EMISSION
SPECTROSCOPY