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Ultrasonic Effects on Electroorganic Processes. Part 10. Product‐Selectivity in Mixed Kolbe Electrolysis of Carboxylic Acids
Author(s) -
Fujiwara Hiroki,
Atobe Mahito,
Kanetsuna Hidenori,
aka Tsutomu
Publication year - 1998
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199800029
Subject(s) - chemistry , electrolysis , selectivity , ultrasonic sensor , aqueous solution , anode , anodic oxidation , cavitation , electrode , photochemistry , inorganic chemistry , organic chemistry , catalysis , thermodynamics , physics , acoustics , electrolyte
Product‐selectivity was examined in mixed Kolbe electrolysis of carboxylic acids on a platinum anode in aqueous methanolic solutions under ultrasonic irradiation. It was found that an ultrasonic effect on the selectivity is caused not only by promotion of mass transport across the electrode interface but also by adsorption control of intermediated radical species by ultrasonic acoustic and cavitation effects. Namely, formation of the one‐electron oxidation products is favourable at low current densities compared with two‐electron oxidation products under irradiation, while the two‐electron oxidation is promoted at high current density. This is the ultrasonic effect characteristic of the Kolbe electrolysis. The mechanism of the ultrasonic effect is discussed with a hypothesis.