Electrocatalytic Hydrogenolysis of Chlorophenolic Compounds by Modified Electrodes in Aqueous Medium in the Absence and the Presence of Ionic Surfactant

Sadia Boukreris; Hocine Ilikti; Mohammed Hadj Youcef; Aicha Khenifi; Tayeb Benabdallah

doi:10.3139/113.110530

Article

Electrocatalytic Hydrogenolysis of Chlorophenolic Compounds by Modified Electrodes in Aqueous Medium in the Absence and the Presence of Ionic Surfactant

Sadia Boukreris , Hocine Ilikti , Mohammed Hadj Youcef , Aicha Khenifi and Tayeb Benabdallah

Published/Copyright: November 13, 2017

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From the journal Tenside Surfactants Detergents Volume 54 Issue 6

Abstract

The electrocatalytic hydrogenolysis of different chlorophenolic compounds, namely 2-chlorophenol (2CP) and pentachlorophenol (PCP) was performed on nickel-silica (Ni-SiO₂) and nickel-clay (Ni-CY) electrode catalyts. The influence of the catalytic support and the surfactant agent was studied in aqueous media at different pH. Results demonstrated that different regioselectivities were observed according to the used catalytic support. The cyclohexanone was obtained as the major product. In presence of ionic surfactants (SDS and CTAB), the investigated electrodes exhibited a promising dechlorination and hydrogenation potential of aromatic halides with high electrocatalytic activity and good stability.

Kurzfassung

Die elektrokatalytische Hydrogenolyse von verschiedenen chlorphenolischen Verbindungen, nämlich 2-Chlorphenol (2CP) und Pentachlorphenol (PCP), wurde an Nickel-Siliciumdioxid (Ni-SiO₂)- und Nickel-Ton (Ni-CY)-Elektrodenkatalysatoren durchgeführt. Der Einfluss des katalytischen Trägers und des Tensids wurde in wässrigen Medien bei unterschiedlichem pH-Werten untersucht. Die Ergebnisse zeigten, dass unterschiedliche Regioselektivitäten vorliegen, je nachdem, welcher katalytische Träger verwendet wurde. Cyclohexanon wurde als Hauptprodukt erhalten. In Gegenwart der ionischen Tenside SDS und CTAB zeigten die untersuchten Elektroden ein vielversprechendes Dechlorierungs- und Hydrierungspotential von aromatischen Halogeniden mit hoher elektrokatalytischer Aktivität und guter Stabilität.

Key words: Hydrogenolysis; aromatic halides; chlorophenols; ionic surfactants; modified electrodes

Stichwörter: Hydrogenolyse; aromatische Halogenide; Chlorphenole; ionische Tenside; modifizierte Elektroden

*Correspondence address, Dr. Sadia Boukreris, Laboratoire de Chimie et d'Electrochimie des Complexes Métalliques (LCECM), Département de Chimie Organique Industrielle, Faculté de Chimie, Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf-(USTO-MB), BP: 1505 El-M'naouer, Oran 31000, Algérie, E-Mail: Sadia.boukreris@univ-usto.dz

Dr. Sadia Boukreris was born in 1971; she has received her bachelor's degree in chemistry engineering in 1997 and her master's degree in organic chemistry in 2004 from the University of the Sciences and Technology of Oran. Her research interest is in the applied of organic Chemistry in catalysis. She is currently a lecturer at the Faculty of Chemistry, USTOMB, Oran.

Prof. Hocine Ilikti received his B. Sc. in organic chemistry in 1984 and his M. Sc. in organic chemistry in 1992 from the University of Sciences and Technology, Oran, Algeria. He was awarded his Ph. D. in organic chemistry in 2004 from the University of Sciences and Technology, Oran. He is currently a professor at the Faculty of Chemistry, University of Sciences and Technology Oran, Algeria.

Dr. Mohammed Hadj Youcef received his M. Sc. and Ph. D. degrees from the University of the Sciences and Technology of Oran. He has published about 15 publications. He is currently a lecturer at the Faculty of Chemistry, University of the Sciences and Technology of Oran, Algeria. His focus is the separation of metallic complexes species from aqueous and surfactants solutions.

Dr. Aicha Khenifi was born in 1973; she has received her M. Sc. and Ph. D. degrees from the University of the Sciences and Technology of Oran. She has published about 12 publications. She is currently a lecturer at the Faculty of Chemistry, University of the Sciences and Technology of Oran, Algeria. His focus is in the applied of the mineral materials in separation and degradation of chemical species.

Prof. Tayeb Benabdallah received his M. Sc. degree in Organic Chemistry in 1983 from the University of Oran-Es-Senia. He was awarded his Ph. D. in Organic Chemistry in 1987 from the University of AIX-Marseille II under the supervision of Professor R. Guglielmetti. He has supervised more than 15 M. Sc. and Ph. D. students and published about 30 publications. He is currently a professor at the Faculty of Chemistry, University of the Sciences and Technology of Oran, Algeria.

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Received: 2017-04-09

Accepted: 2017-05-30

Published Online: 2017-11-13

Published in Print: 2017-11-15

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https://doi.org/10.3139/113.110530

Keywords for this article

Hydrogenolysis; aromatic halides; chlorophenols; ionic surfactants; modified electrodes