Sulfide ion electrooxidation catalysed by cobalt phthalocyanine microcrystals |
| |
Authors: | Šebojka Komorsky-Lovrić Milivoj Lovrić Fritz Scholz |
| |
Affiliation: | (1) Center for Marine Research, Ruder Bokovi Institute, POB 1016, 10001 Zagreb, Croatia;(2) Institut für Chemie, Humboldt-Universität, Hessische Strasse 1-2, 10115 Berlin, Federal Republic of Germany |
| |
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. |
| |
Keywords: | sulfide electrooxidation cobalt phthalocyanine cyclic voltammetry |
本文献已被 SpringerLink 等数据库收录! |
|