Author(s):
Kambiré Ollo, Sadia Sahi Placide, Kouakou Yao Urbain, Pohan Lemeyonouin Aliou Guillaume, Koffi Konan Sylvestre, Kouadio Kouakou Etienne, Kimou Kouakou Jocelin, Koné Souleymane, Lassiné Ouattara
Email(s):
kambireollo@yahoo.fr
DOI:
10.52711/0974-4150.2022.00037 
Address:
Kambiré Ollo1*, Sadia Sahi Placide2, Kouakou Yao Urbain1, Pohan Lemeyonouin Aliou Guillaume3, Koffi Konan Sylvestre2, Kouadio Kouakou Etienne2, Kimou Kouakou Jocelin2, Koné Souleymane2 and Lassiné Ouattara2
1UFR Sciences et Technologies, Université de Man, BP 20 Man, Côte d’Ivoire.
2Laboratoire de constitution et réaction de la matière, UFR SSMT, Université Félix Houphouët-Boigny de Cocody, Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire.
3UFR Sciences Biologiques, Université Peleforo Gon Coulibaly de Korhogo, BP 1328 Korhogo, Côte d’Ivoire.
*Corresponding Author
Published In:
Volume - 15,
Issue - 3,
Year - 2022
ABSTRACT:
The platinum anode modified by metal oxides electrodes degrades Abidjan wastewater which contains a high concentration of Cl-. During this degradation process, the organic polluants are oxidized, O2 and Cl2 are produced. The purpose of this study is to contribute to the understanding of these reaction mechanisms by studying the kinetics of O2 and Cl2 evolution at neutral pH on Pt. The study was performed by interpreting the voltammograms and Tafel slopes obtained. The voltammetric measurements were carried out using an Autolab Potentiostat from ECHOCHEMIE (PGSTAT 20) connected by interface to a computer. Pt electrode was prepared on titanium (Ti) substrate by thermal decomposition techniques at 400°C. The characterization of the surface of the prepared electrode by scanning electron microscopy and X-ray photoelectron spectrometry showed the presence of platinum on its surface. The results obtained show that the OH· are adsorbed on the active sites of Pt. Then they react to form PtO. Then by reaction between the surface oxygen and PtO, O2 is produced and the active sites are regenerated. In the presence of low Cl- concentration, there is a competition between the Cl2 and O2 evolution reactions. However, Cl2 only is produced for high Cl- concentrations. The kinetics of the evolution reaction of chlorine increases with the concentration of Cl- and remains constant for concentrations greater than 0.5 M. This study also showed that the chlorine reduction reaction produced in solution is a diffusion-controlled reaction for low scan rates.
Cite this article:
Kambiré Ollo, Sadia Sahi Placide, Kouakou Yao Urbain, Pohan Lemeyonouin Aliou Guillaume, Koffi Konan Sylvestre, Kouadio Kouakou Etienne, Kimou Kouakou Jocelin, Koné Souleymane, Lassiné Ouattara. Kinetic of the Oxygen and Chlorine Evolution Reaction on Platinum Electrodes at Neutral pH. Asian Journal of Research in Chemistry. 2022; 15(3):213-9. doi: 10.52711/0974-4150.2022.00037
Cite(Electronic):
Kambiré Ollo, Sadia Sahi Placide, Kouakou Yao Urbain, Pohan Lemeyonouin Aliou Guillaume, Koffi Konan Sylvestre, Kouadio Kouakou Etienne, Kimou Kouakou Jocelin, Koné Souleymane, Lassiné Ouattara. Kinetic of the Oxygen and Chlorine Evolution Reaction on Platinum Electrodes at Neutral pH. Asian Journal of Research in Chemistry. 2022; 15(3):213-9. doi: 10.52711/0974-4150.2022.00037 Available on: https://ajrconline.org/AbstractView.aspx?PID=2022-15-3-6
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