Spectroelectrochemical study of perchloroethylene reduction at copper electrodes in neutral aqueous medium

Abstract

Ag/AgCl/KCl(3M) carbon residues are the main product, detected on the copper surface by SERS (and confirmed by XPS), whereas in solution higher levels of dichloroethylene and trichloroethylene are detected with a DCE/TCE ratio bellow 1.

20kHz sonoelectrochemical degradation of perchloroethylene in sodium sulfate aqueous media: Influence of the operational variables in batch mode

“…Perchloroethylene (PCE) is a widely used solvent in many areas of industry and has been reported as a major intermediate in the degradation of other chlorinated compounds. In our laboratory we are analyzing the degradation of this compound using different approaches: (i) by electrochemical treatments with not only fundamental [25,26] but also applied [27,28] studies; (ii) sonochemical treatments [29] and now (iii) sonoelectrochemical treatments, as in the present study.…”

Electrochemical hydrodechlorination of perchloroethylene in groundwater on a Ni-doped graphene composite cathode driven by a microbial fuel cell

“…are widely used as cathode materials. [26][27][28][29] Especially noble metals such as Pt and Pd have excellent catalytic property for electrochemical hydrodechlorination due to their low electric potential of producing hydrogen and high capacity of adsorbing hydrogen. [30][31][32] However, high cost actually limits the application of noble metals Pt and Pd.…”

Electroreduction of aliphatic chlorides at silver cathodes in water

“…Recently, some electrochemical methods have been proposed for the abatement and the detection [24] of these substances. The electrochemical abatement in water can be performed by the anodic oxidation to carbon dioxide, often called ''electrochemical incineration" [2][3][4][5] or the cathodic reduction to de-halogenated aliphatic hydrocarbons [6][7][8][9][10][11][12][13][14][15][16][17][18]. Furthermore, a third electrochemical route, based on the anodic oxidation to carbon dioxide coupled with the cathodic reduction to de-halogenated hydrocarbons, was proposed [19][20][21].…”

“…Hence, a certain attention has been devoted to the utilization of electrode materials characterized by electrocatalytic activity for the reduction of organic halides such as Pd, Pt, Ag, and Cu [6][7][8][9][10][11][12][13][14][15][16][17]. Sonoyama and Sakata showed that chloroform can be mainly converted in the corresponding alkane in water at Ag impregnated carbon fiber electrodes up to residual concentrations below 1 ppm.…”

“…The cathodic treatment of waste waters contaminated by chlorinated aliphatic hydrocarbons has been widely investigated by many authors [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The electrochemical reduction of organic chlorides was performed also in aprotic solvents with the aims of developing friendly electrosynthetic processes [25][26][27][28][29][30]37,47,48] and for wastewater treatment after the separation of pollutants from water and the successive dissolution in suitable organic solvents [17].…”