Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy

This paper reports on a study aimed to modify the surface of glassy carbon (VC) with Co-Mo nanoparticles and to determine their morphology and composition in order to evaluate their electrocatalytic activity for degrading phenol. The electrochemical deposition of Co-Mo from CoSO4 and Na2MoO4 in two...

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Autores principales: Orozco, S.I., Blanco Jerez, Leonor María, Garza Elizondo, Mario Alberto
Formato: Artículo
Lenguaje:inglés
Publicado: 2013
Materias:
Acceso en línea:http://eprints.uanl.mx/25381/1/25381.pdf
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author Orozco, S.I.
Blanco Jerez, Leonor María
Garza Elizondo, Mario Alberto
author_facet Orozco, S.I.
Blanco Jerez, Leonor María
Garza Elizondo, Mario Alberto
author_sort Orozco, S.I.
collection Repositorio Institucional
description This paper reports on a study aimed to modify the surface of glassy carbon (VC) with Co-Mo nanoparticles and to determine their morphology and composition in order to evaluate their electrocatalytic activity for degrading phenol. The electrochemical deposition of Co-Mo from CoSO4 and Na2MoO4 in two molar relations (Co:Mo 2.3:1 and 20:1) was analyzed. Experiments were conducted in a conventional three-electrode cell using glassy carbon as the working electrode (WE), Ag/AgCl(s) as the reference electrode (RE) and Pt as the auxiliary electrode (CE). A citrate bath at pH 6 was used as supporting electrolyte. The electrode modification was carried out potentiostatically at –1.1 V vs. Ag/AgCl(s) and galvanostatically at –0.003 A/cm2. The modified electrodes were characterized by XRD, TEM and XPS. Analyses showed that the obtained deposits were a mixture of Co2Mo3 alloy and CoMoO3 oxide. The ability of the electrode modified with Co-Mo particles to degrade phenol was studied. Degradation rate was 95% in 3 hours on a synthetic solution of phenol 30 ppm. UV-Vis spectra of the solutions obtained during electrochemical phenol reduction allowed identifying benzene and cyclohexane as the reaction products.
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spelling eprints-253812023-05-06T03:48:43Z http://eprints.uanl.mx/25381/ Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy Orozco, S.I. Blanco Jerez, Leonor María Garza Elizondo, Mario Alberto QD Química This paper reports on a study aimed to modify the surface of glassy carbon (VC) with Co-Mo nanoparticles and to determine their morphology and composition in order to evaluate their electrocatalytic activity for degrading phenol. The electrochemical deposition of Co-Mo from CoSO4 and Na2MoO4 in two molar relations (Co:Mo 2.3:1 and 20:1) was analyzed. Experiments were conducted in a conventional three-electrode cell using glassy carbon as the working electrode (WE), Ag/AgCl(s) as the reference electrode (RE) and Pt as the auxiliary electrode (CE). A citrate bath at pH 6 was used as supporting electrolyte. The electrode modification was carried out potentiostatically at –1.1 V vs. Ag/AgCl(s) and galvanostatically at –0.003 A/cm2. The modified electrodes were characterized by XRD, TEM and XPS. Analyses showed that the obtained deposits were a mixture of Co2Mo3 alloy and CoMoO3 oxide. The ability of the electrode modified with Co-Mo particles to degrade phenol was studied. Degradation rate was 95% in 3 hours on a synthetic solution of phenol 30 ppm. UV-Vis spectra of the solutions obtained during electrochemical phenol reduction allowed identifying benzene and cyclohexane as the reaction products. 2013 Article NonPeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/25381/1/25381.pdf http://eprints.uanl.mx/25381/1.haspreviewThumbnailVersion/25381.pdf Orozco, S.I. y Blanco Jerez, Leonor María y Garza Elizondo, Mario Alberto (2013) Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy. International Journal of Electrochemical Science, 8. pp. 5698-5709. ISSN 14523981
spellingShingle QD Química
Orozco, S.I.
Blanco Jerez, Leonor María
Garza Elizondo, Mario Alberto
Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy
thumbnail https://rediab.uanl.mx/themes/sandal5/images/online.png
title Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy
title_full Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy
title_fullStr Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy
title_full_unstemmed Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy
title_short Phenol degradation using glassy carbon electrodes modified with particles of Co-Mo alloy
title_sort phenol degradation using glassy carbon electrodes modified with particles of co mo alloy
topic QD Química
url http://eprints.uanl.mx/25381/1/25381.pdf
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AT blancojerezleonormaria phenoldegradationusingglassycarbonelectrodesmodifiedwithparticlesofcomoalloy
AT garzaelizondomarioalberto phenoldegradationusingglassycarbonelectrodesmodifiedwithparticlesofcomoalloy