Premium
Electrogeneration of superoxide ion at mercury electrodes with a hydrophobic adsorption film in aqueous media
Author(s) -
Matsumoto Futoshi,
Tokuda Koichi,
Ohsaka Takeo
Publication year - 1996
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140080709
Subject(s) - mercury (programming language) , adsorption , superoxide , electrode , aqueous solution , ion , aqueous medium , inorganic chemistry , chemistry , materials science , chemical engineering , organic chemistry , computer science , enzyme , engineering , programming language
The electrogeneration of superoxide ion (O 2 − ) by the one‐electron reduction of O 2 in alkaline aqueous media has been examined using the hanging mercury drop electrode in the presence of several surfactants of the quinoline groups. Based on the superoxide dismutase (SOD)‐catalyzed disproportionation behavior of O 2 −on the cyclic voltammograms, new surfactants, in the presence of which O 2 −was actually electrogenerated, could be searched: 2‐, 4‐, 6‐, 7‐ and 8‐methylquinolines (3,4,5,6 and 7), and 2‐phenyl and 5,6‐benzoquinolines (8 and 9). It was found that the effectiveness for the electrogeneration of O 2 −largely depends on the surfactant and decreases in the order of quinoline (l), isoquinoline (2) > 5, 6, 7 > 3, 4 > 8 > triphenylphosphine oxide (10) > 9. In addition, a brief discussion on the structure and physicochemical properties of the surfactant film desirable for the effective O 2 −electrogeneration in aqueous media is given.