Dechlorination of chloroaromatics by electrocatalytic reduction over palladium-loaded carbon felt at room temperature
详细信息 查看全文
- 作者：Tsyganok ; Andrey I. ; Yamanaka ; Ichiro ; Otsuka ; Kiyoshi
- 关键词：reductive dehalogenation ; chloroaromatics ; electrocatalysis ; palladium ; carbon felt
- 刊名：Chemosphere
- 出版年：1999
- 出版时间：November, 1999
- 年：1999
- 卷：39
- 期：11
- 页码：1819-1831
- 全文大小：733 K
文摘
The selective dechlorination of various chloroaromatics in water-MeOH medium containing trifluoroacetic acid and tetraalkylammonium salts was successfully performed over Pd-loaded carbon felt cathode at room temperature. The reactivities of 2,4-dichlorophenyl derivatives varied in the order: 2,4-dichlorotoluene < 2,4-dichlorophenol ≤ 2,4-dichloroanisole ≤ 2,4-dichlorobenzoic acid < 2,4-dichlorophenoxyacetic acid < 2,4-dichlorophenethyl alcohol. For 2,4-dihaloanisoles, the ease of reductive cleavage of C--X (X=halogen) bond was as follows: F 
Cl < Br. For monochlorobiphenyls, the dechlorination and product recovery efficiencies were remarkably affected by tetraalkylammonium cations of different size. The reaction scheme for the selective electrocatalytic dehalogenation of haloaromatics over Pd-loaded felt cathode was proposed.
Cl < Br. For monochlorobiphenyls, the dechlorination and product recovery efficiencies were remarkably affected by tetraalkylammonium cations of different size. The reaction scheme for the selective electrocatalytic dehalogenation of haloaromatics over Pd-loaded felt cathode was proposed.