ISSN:
1436-5073
Keywords:
sulfide
;
electrooxidation
;
cobalt phthalocyanine
;
cyclic voltammetry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Electrooxidation of sulfide ion catalysed by microcrystals of cobalt phthalocyanine was investigated by cyclic voltammetry in 0.5M KNO3 at pH 9.22. Traces of catalyst were immobilized at the surface of a paraffin-impregnated graphite electrode by the mechanical transfer of its powder. The electro-oxidation of HS− proceeds in two irreversible steps, with the first peak between 0 V and −0.12 V and the second at 0.17 V. The first step is second order in HS− and its product is the adsorbed disulfide, which may further dissociate to give adsorbed sulfur atoms. The reduction of sulfur occurs at −0.1 V.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01243171
