Selective removal of chlorine from chloroaromatic pollutants by electrocatalytic reduction over palladium-loaded carbon felt |
| |
Authors: | A I Tsyganok |
| |
Institution: | (1) Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie Street, Ottawa, Ontario, KIN 6N5, Canada |
| |
Abstract: | This brief review outlines work on effective hydrodechlorination of environmentally persistent chlorine-containing aromatic
pollutants by electrocatalytic reduction at Pd-loaded carbon felt. The selective removal of chlorine from phenoxy herbicides
2,4-D and 2,4,5-T, chlorinated biphenyls and naphthalene was readily achieved (i) at room temperature and (ii) directly in
aqueous media. No highly active reducing chemicals were required for such a treatment. The use of carbon felt of high surface
area as a solution-permeable cathode offered high adsorption capacity for chloroaromatics, while supported palladium provided
the system with a highly reactive reducing species supposed to be a surface-bound hydride, which was generated upon electrochemical
reductive decomposition of water. A facilitating effect of bulky tetraalkylammonium cations of a supporting electrolyte on
substrate conversion and product recovery is considered. The reaction mechanism for selective hydrodechlorination of chloroaromatics
in aqueous media and scheme for activation of Pd-loaded carbon felt by electrolytic pre-treatment are proposed and discussed. |
| |
Keywords: | Hydrodechlorination electrocatalytic reduction carbon felt selective removal |
本文献已被 SpringerLink 等数据库收录! |
|