Spectroelectrochemical study of trichloroacetic acid reduction at copper electrodes in an aqueous sodium sulfate medium

被引：20

作者：

Deseada Esclapez, Maria ^{[1
,2
]}

Isabel Diez-Garcia, Maria ^{[2
,3
]}

Saez, Veronica ^{[2
,3
]}

Tudela, Ignacio ^{[2
,3
]}

Manuel Perez, Juan ^{[2
,4
]}

Gonzalez-Garcia, Jose ^{[2
,3
]}

Bonete, Pedro ^{[1
,2
]}

机构：

[1] Univ Alicante, Dept Quim Fis, Grp Fotoquim & Electroquim semicond, Alicante 03080, Spain

[2] Univ Alicante, Inst Univ Electroquim, E-03080 Alicante, Spain

[3] Univ Alicante, Dept Quim Fis, Grp Nuevos Desarrollos Tecnol Electroquim Sonoele, Alicante 03080, Spain

[4] Univ Alicante, Dept Quim Fis, Grp Espectroelectroquim Fotoelectroquim & Modeliz, Alicante 03080, Spain

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 24期

关键词：

Trichloroacetic acid; Copper electrode; Degradation; Treatment; SERS; ELECTROCHEMICAL REDUCTION; HALOACETIC ACIDS; CARBON-MONOXIDE; ADSORPTION; PERCHLOROETHYLENE; SERS; SPECTROSCOPY; SPECTRA; GOLD; FLUCTUATIONS;

D O I：

10.1016/j.electacta.2011.05.133

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical reduction of trichloroacetic acid (TCAA) in water has been analyzed through voltammetric studies with a copper rotating disc electrode supported by controlled-potential bulk electrolysis and electrochemical surface-enhanced Raman spectroscopy (SERS) experiments. The influences of the mass-transport conditions and concentration were studied. It has been pointed out that the electrochemical reduction of trichloroacetic acid takes place prior to the massive hydrogen evolution. Strong adsorption was observed on the electrode surface, and dichloroacetic acid (DCAA), monochloroacetic acid (MCAA), and chloride anions were detected as reduction products. The SERS experiments point to a secondary mechanism in which dissociative adsorption of the trichloroacetic acid gives rise to the adsorption of CO, and therefore, to the production of 1C molecules as by-products of the electrochemical reduction. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：8138 / 8146

页数：9

共 44 条

[21] Some aspects of SERS temporal fluctuations: analysis of the most intense spectra of hydrogenated amorphous carbon deposited on silver [J].