TY - JOUR
T1 - Spectroelectrochemical study of trichloroacetic acid reduction at copper electrodes in an aqueous sodium sulfate medium
AU - Esclapez, María Deseada
AU - Díez-García, María Isabel
AU - Sáez, Verónica
AU - Tudela, Ignacio
AU - Pérez, Juan Manuel
AU - González-García, José
AU - Bonete, Pedro
PY - 2011/10/1
Y1 - 2011/10/1
N2 - 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.
AB - 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.
KW - Copper electrode
KW - Degradation
KW - SERS
KW - Treatment
KW - Trichloroacetic acid
UR - http://www.scopus.com/inward/record.url?scp=80052816301&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2011.05.133
DO - 10.1016/j.electacta.2011.05.133
M3 - Article
AN - SCOPUS:80052816301
SN - 0013-4686
VL - 56
SP - 8138
EP - 8146
JO - Electrochimica Acta
JF - Electrochimica Acta
IS - 24
ER -