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The electrochemical oxidation of aqueous phenol at a glassy carbon electrode
Author(s) -
Gattrell M.,
Kirk D. W.
Publication year - 1990
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450680615
Subject(s) - phenol , electrolysis , aqueous solution , electrochemistry , chemistry , anode , glassy carbon , bulk electrolysis , passivation , product distribution , electrode , inorganic chemistry , carbon fibers , nuclear chemistry , cyclic voltammetry , materials science , organic chemistry , catalysis , electrolyte , layer (electronics) , composite material , composite number
The electrooxidation of phenol is of interest as a model compound for the treatment of aqueous organic wastes. The effect of voltage, concentration and temperature on the electrochemical oxidation of acidic dilute aqueous solutions of phenol was studied. Electrolysis was carried out by recirculating phenol solutions through a flow‐by electrochemical reactor employing a reticulated glassy carbon anode. Concentrations of phenol and some breakdown products were monitored using HPLC analysis. Increased voltage was found to shift the product distribution to favour more oxidized products but also to increase electrode corrosion and decrease current efficiency. Higher phenol concentrations (over the range of 5‐20 mmol/L) showed a shift in product distribution to favour less oxidized, mostly insoluble products. Elevated temperatures (about 50°C and higher) showed a marked ability to reduce electrode passivation and increase the phenol oxidation rate.