A study of glassy carbon electrodes modified with azobenzene derivatives
作者： Elo Kibena , Uno Mäeorg , Leonard Matisen , Priit Sulamägi , Kaido Tammeveski
DOI: 10.1016/J.JELECHEM.2012.09.017
关键词:
摘要: Abstract Three different azobenzene derivatives (azobenzene diazonium tetrafluoroborate, Fast Garnet GBC sulphate salt and Black K salt) were covalently attached to glassy carbon (GC) electrodes by electrochemical grafting. The grafting of GC surfaces was controlled varying the number potential cycles during modification procedures. presence azo groups on modified electrode confirmed X-ray photoelectron spectroscopy. properties characterised cyclic voltammetry rotating disc (RDE) technique using Fe ( CN ) 6 3 - / 4 redox system. blocking behaviour aryl films towards oxygen reduction studied linear sweep RDE method. action aryl-modified for ferricyanide significantly greater than O2 reduction. By estimating parameter relative efficiency best barrier observed azobenzene-modified electrodes.
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